N-CSRS 1 acgit93022n-csr.htm N-CSRS Document

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM N-CSR

CERTIFIED SHAREHOLDER REPORT OF REGISTERED
MANAGEMENT INVESTMENT COMPANIES

Investment Company Act file number811-04363
AMERICAN CENTURY GOVERNMENT INCOME TRUST
(Exact name of registrant as specified in charter)
4500 MAIN STREET, KANSAS CITY, MISSOURI64111
(Address of principal executive offices)(Zip Code)
JOHN PAK
4500 MAIN STREET, KANSAS CITY, MISSOURI 64111
(Name and address of agent for service)
Registrant’s telephone number, including area code:816-531-5575
Date of fiscal year end:03-31
Date of reporting period:09-30-2022




ITEM 1. REPORTS TO STOCKHOLDERS.

(a) Provided under separate cover.






    


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Semiannual Report
September 30, 2022
Capital Preservation Fund
Investor Class (CPFXX)

 






























Table of Contents
President’s Letter
Fund Characteristics
Shareholder Fee Example
Schedule of Investments
Statement of Assets and Liabilities
Statement of Operations
Statement of Changes in Net Assets
Notes to Financial Statements
Financial Highlights
Approval of Management Agreement
Additional Information


























Any opinions expressed in this report reflect those of the author as of the date of the report, and do not necessarily represent the opinions of American Century Investments® or any other person in the American Century Investments organization. Any such opinions are subject to change at any time based upon market or other conditions and American Century Investments disclaims any responsibility to update such opinions. These opinions may not be relied upon as investment advice and, because investment decisions made by American Century Investments funds are based on numerous factors, may not be relied upon as an indication of trading intent on behalf of any American Century Investments fund. Security examples are used for representational purposes only and are not intended as recommendations to purchase or sell securities. Performance information for comparative indices and securities is provided to American Century Investments by third party vendors. To the best of American Century Investments’ knowledge, such information is accurate at the time of printing.



President’s Letter
image6.jpg Jonathan Thomas

Dear Investor:

Thank you for reviewing this semiannual report for the period ending September 30, 2022. It provides a market overview (below), followed by a schedule of fund investments and other financial information. For additional investment insights, please visit americancentury.com.

Inflation, Rates, Recession Worries Weighed on Financial Markets

The reporting period began with financial markets digesting the effects of soaring inflation, heightened market volatility and slowing growth. For more than a year, the effects of massive fiscal and monetary support, escalating energy prices, supply chain breakdowns and labor market shortages had driven inflation to multidecade highs. The Russia-Ukraine war continued to nudge commodity prices even higher, exacerbating existing inflationary pressures and further damaging global supply chains.

The Federal Reserve (Fed), which began tightening in March with a 25-basis-points (bps) hike, increased rates an additional 275 bps during the six-month period. Inflation was slow to respond, climbing to a 40-year-high 9.1% in June before slipping to 8.2% in September, largely due to falling gasoline prices. Policymakers indicated taming inflation remains their priority, even as the economy contracted in 2022’s first two quarters and an official recession appeared imminent.

In addition to fueling recession risk, the combination of elevated inflation and a hawkish Fed helped push Treasury yields sharply higher and stock prices significantly lower. Amid persistent market unrest, most stock and bond indices ended the six-month period with steep losses. Stocks, as measured by the S&P 500 Index, plunged more than 20%, while bonds, as measured by the Bloomberg U.S. Aggregate Bond Index, tumbled more than 9%.

Staying Disciplined in Uncertain Times

We expect market volatility to linger as investors navigate a complex environment of high inflation, rising interest rates and economic uncertainty. In addition, Russia’s invasion of Ukraine complicates an increasingly tense geopolitical backdrop and threatens global energy markets. We will continue to monitor this evolving situation and what it broadly means for investors across asset classes.

We appreciate your confidence in us during these extraordinary times. Our firm has a long history of helping clients weather unpredictable markets, and we’re confident we will continue to meet today’s challenges.

Sincerely,
image48a16.jpg
Jonathan Thomas
President and Chief Executive Officer
American Century Investments
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Fund Characteristics
SEPTEMBER 30, 2022
Yields
7-Day Current Yield 2.24%
7-Day Effective Yield 2.27%
Portfolio at a Glance
Weighted Average Maturity
57 days
Weighted Average Life
101 days
Portfolio Composition by Maturity% of fund investments
1-30 days56%
31-90 days18%
91-180 days17%
More than 180 days9%

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Shareholder Fee Example

Fund shareholders may incur two types of costs: (1) transaction costs, including sales charges (loads) on purchase payments and redemption/exchange fees; and (2) ongoing costs, including management fees; distribution and service (12b-1) fees; and other fund expenses. This example is intended to help you understand your ongoing costs (in dollars) of investing in your fund and to compare these costs with the ongoing cost of investing in other mutual funds.

The example is based on an investment of $1,000 made at the beginning of the period and held for the entire period from April 1, 2022 to September 30, 2022.

Actual Expenses

The table provides information about actual account values and actual expenses for each class. You may use the information, together with the amount you invested, to estimate the expenses that you paid over the period. First, identify the share class you own. Then simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number under the heading “Expenses Paid During Period” to estimate the expenses you paid on your account during this period.

If you hold Investor Class shares of any American Century Investments mutual fund, or I Class shares of the American Century Diversified Bond Fund, in an American Century Investments account (i.e., not through a financial intermediary or employer-sponsored retirement plan account), American Century Investments may charge you a $25 annual account maintenance fee if the value of those shares is less than $10,000. We will redeem shares automatically in one of your accounts to pay the $25 fee. In determining your total eligible investment amount, we will include your investments in all personal accounts (including American Century Investments brokerage accounts) registered under your Social Security number. Personal accounts include individual accounts, joint accounts, UGMA/UTMA accounts, personal trusts, Coverdell Education Savings Accounts and IRAs (including traditional, Roth, Rollover, SEP-, SARSEP- and SIMPLE-IRAs), and certain other retirement accounts. If you have only business, business retirement, employer-sponsored or American Century Investments brokerage accounts, you are currently not subject to this fee. If you are subject to the account maintenance fee, your account value could be reduced by the fee amount.

Hypothetical Example for Comparison Purposes

The table also provides information about hypothetical account values and hypothetical expenses based on the actual expense ratio of each class of your fund and an assumed rate of return of 5% per year before expenses, which is not the actual return of a fund’s share class. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in your fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds.

Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transactional costs, such as sales charges (loads) or redemption/exchange fees. Therefore, the table is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. In addition, if these transactional costs were included, your costs would have been higher.

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Beginning
Account Value
4/1/22
Ending
Account Value
9/30/22
Expenses Paid
During Period(1)
4/1/22 - 9/30/22
Annualized
Expense Ratio(1)
Actual
Investor Class$1,000$1,004.50$2.360.47%
Hypothetical
Investor Class$1,000$1,022.71$2.380.47%
(1)Expenses are equal to the class's annualized expense ratio listed in the table above, multiplied by the average account value over the period, multiplied by 183, the number of days in the most recent fiscal half-year, divided by 365, to reflect the one-half year period. Annualized expense ratio reflects actual expenses, including any applicable fee waivers or expense reimbursements and excluding any acquired fund fees and expenses.
5


Schedule of Investments

SEPTEMBER 30, 2022 (UNAUDITED)
Principal AmountValue
U.S. TREASURY BILLS(1) — 40.8%
U.S. Treasury Bills, 2.32%, 10/4/22$25,750,000 $25,744,949 
U.S. Treasury Bills, 1.89%, 10/6/2222,000,000 21,994,347 
U.S. Treasury Bills, 2.66%, 10/25/22100,000,000 99,824,667 
U.S. Treasury Bills, 2.78%, 11/1/2247,500,000 47,394,679 
U.S. Treasury Bills, 2.65%, 11/3/2270,000,500 69,910,582 
U.S. Treasury Bills, 1.41%, 11/10/2250,000,000 49,923,055 
U.S. Treasury Bills, 3.05%, 11/22/2270,000,000 69,706,257 
U.S. Treasury Bills, 3.05%, 11/29/228,500,000 8,459,474 
U.S. Treasury Bills, 0.24%, 12/1/2220,000,000 19,991,867 
U.S. Treasury Bills, 3.03%, 12/8/2225,000,000 24,859,986 
U.S. Treasury Bills, 2.57%, 12/29/2222,500,000 22,360,938 
U.S. Treasury Bills, 2.76%, 1/12/2360,000,000 59,539,075 
U.S. Treasury Bills, 2.99%, 1/19/2333,500,000 33,202,129 
U.S. Treasury Bills, 3.01%, 1/26/2339,025,000 38,684,343 
U.S. Treasury Bills, 2.93%, 2/2/2331,250,000 30,943,229 
U.S. Treasury Bills, 3.13%, 2/9/2335,000,000 34,613,550 
U.S. Treasury Bills, 3.33%, 3/2/2320,000,000 19,726,822 
U.S. Treasury Bills, 3.58%, 3/16/2322,500,000 22,140,506 
U.S. Treasury Bills, 3.91%, 3/23/2335,000,000 34,364,225 
U.S. Treasury Bills, 3.90%, 3/30/231,420,000 1,393,495 
U.S. Treasury Bills, 1.93%, 4/20/2347,000,000 46,507,364 
U.S. Treasury Bills, 2.18%, 5/18/2335,535,000 35,060,907 
U.S. Treasury Bills, 3.14%, 6/15/2311,550,000 11,302,366 
U.S. Treasury Bills, 3.76%, 7/13/2335,000,000 34,002,500 
U.S. Treasury Bills, 3.64%, 9/7/2340,000,000 38,641,574 
TOTAL U.S. TREASURY BILLS
900,292,886 
U.S. TREASURY NOTES(1) — 25.7%
U.S. Treasury Notes, 1.875%, 10/31/2225,000,000 25,007,906 
U.S. Treasury Notes, 0.14%, 11/15/2215,000,000 14,997,460 
U.S. Treasury Notes, 1.625%, 11/15/2245,000,000 45,051,780 
U.S. Treasury Notes, 0.125%, 12/31/228,900,000 8,895,981 
U.S. Treasury Notes, 1.375%, 2/15/2340,000,000 39,931,448 
U.S. Treasury Notes, 0.125%, 2/28/2340,000,000 39,687,500 
U.S. Treasury Notes, 2.625%, 2/28/2330,000,000 29,992,928 
U.S. Treasury Notes, 0.125%, 4/30/2320,000,000 19,551,689 
U.S. Treasury Notes, 0.125%, 6/30/2310,000,000 9,710,415 
U.S. Treasury Notes, VRN, 3.35%, (3-month USBMMY plus 0.06%), 10/31/2233,950,000 33,950,993 
U.S. Treasury Notes, VRN, 3.35%, (3-month USBMMY plus 0.05%), 1/31/2375,000,000 75,006,858 
U.S. Treasury Notes, VRN, 3.33%, (3-month USBMMY plus 0.03%), 4/30/2325,000,000 25,001,318 
U.S. Treasury Notes, VRN, 3.33%, (3-month USBMMY plus 0.03%), 7/31/2390,000,000 90,077,886 
U.S. Treasury Notes, VRN, 3.33%, (3-month USBMMY plus 0.04%), 10/31/2325,000,000 24,999,178 
U.S. Treasury Notes, VRN, 3.28%, (3-month USBMMY minus 0.02%), 1/31/2460,000,000 60,025,242 
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Principal AmountValue
U.S. Treasury Notes, VRN, 3.33%, (3-month USBMMY plus 0.04%), 7/31/24$25,000,000 $24,986,182 
TOTAL U.S. TREASURY NOTES

566,874,764 
TOTAL INVESTMENT SECURITIES — 66.5%

1,467,167,650 
OTHER ASSETS AND LIABILITIES — 33.5%

740,150,926 
TOTAL NET ASSETS — 100.0%

$2,207,318,576 

NOTES TO SCHEDULE OF INVESTMENTS
USBMMY-U.S. Treasury Bill Money Market Yield
VRN-Variable Rate Note. The rate adjusts periodically based upon the terms set forth in the security’s offering documents. The rate shown is effective at the period end and the reference rate and spread, if any, is indicated. The security's effective maturity date may be shorter than the final maturity date shown.
(1)The rates for U.S. Treasury Bills are the yield to maturity at purchase. The rates for U.S. Treasury Notes are the stated coupon rates.


See Notes to Financial Statements.
7


Statement of Assets and Liabilities
SEPTEMBER 30, 2022 (UNAUDITED)
Assets
Investment securities, at value (amortized cost and cost for federal income tax purposes)$1,467,167,650 
Cash2,422 
Receivable for investments sold765,456,639 
Receivable for capital shares sold5,611,459 
Interest receivable2,284,256 
2,240,522,426 
Liabilities
Payable for investments purchased30,912,924 
Payable for capital shares redeemed1,435,208 
Accrued management fees855,718 
33,203,850 
Net Assets$2,207,318,576 
Investor Class Capital Shares
Shares outstanding (unlimited number of shares authorized)2,207,168,354 
Net Asset Value Per Share$1.00 
Net Assets Consist of:
Capital paid in$2,207,171,244 
Distributable earnings147,332 
$2,207,318,576 


See Notes to Financial Statements.
8


Statement of Operations
FOR THE SIX MONTHS ENDED SEPTEMBER 30, 2022 (UNAUDITED)
Investment Income (Loss)
Income:
Interest$14,918,050 
Expenses:
Management fees5,173,853 
Trustees' fees and expenses74,413 
Other expenses243 
5,248,509 
Fees waived(82,144)
5,166,365 
Net investment income (loss)9,751,685 
Net realized gain (loss) on investment transactions147,252 
Net Increase (Decrease) in Net Assets Resulting from Operations$9,898,937 


See Notes to Financial Statements.
9


Statement of Changes in Net Assets
SIX MONTHS ENDED SEPTEMBER 30, 2022 (UNAUDITED) AND YEAR ENDED MARCH 31, 2022
Increase (Decrease) in Net Assets
September 30, 2022March 31, 2022
Operations
Net investment income (loss)$9,751,685 $219,788 
Net realized gain (loss)147,252 
Net increase (decrease) in net assets resulting from operations9,898,937 219,794 
Distributions to Shareholders
From earnings(9,754,686)(219,788)
Capital Share Transactions
Proceeds from shares sold467,612,500 729,596,968 
Proceeds from reinvestment of distributions9,754,686 215,245 
Payments for shares redeemed(465,810,906)(821,073,800)
Net increase (decrease) in net assets from capital share transactions11,556,280 (91,261,587)
Net increase (decrease) in net assets11,700,531 (91,261,581)
Net Assets
Beginning of period2,195,618,045 2,286,879,626 
End of period$2,207,318,576 $2,195,618,045 
Transactions in Shares of the Fund
Sold467,612,500 729,596,968 
Issued in reinvestment of distributions9,754,686 215,245 
Redeemed(465,810,906)(821,073,800)
Net increase (decrease) in shares of the fund11,556,280 (91,261,587)


See Notes to Financial Statements.
10


Notes to Financial Statements

SEPTEMBER 30, 2022 (UNAUDITED)

1. Organization

American Century Government Income Trust (the trust) is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company and is organized as a Massachusetts business trust. Capital Preservation Fund (the fund) is one fund in a series issued by the trust. The fund is a money market fund and its investment objective is to seek maximum safety and liquidity. Its secondary objective is to seek to pay shareholders the highest rate of return consistent with safety and liquidity.

2. Significant Accounting Policies

The following is a summary of significant accounting policies consistently followed by the fund in preparation of its financial statements. The fund is an investment company and follows accounting and reporting guidance in accordance with accounting principles generally accepted in the United States of America. This may require management to make certain estimates and assumptions at the date of the financial statements. Actual results could differ from these estimates. Management evaluated the impact of events or transactions occurring through the date the financial statements were issued that would merit recognition or disclosure.

Investment Valuations — The fund determines the fair value of its investments and computes its net asset value (NAV) per share at the close of regular trading (usually 4 p.m. Eastern time) on the New York Stock Exchange (NYSE) on each day the NYSE is open. The value of investments of the fund is determined by American Century Investment Management, Inc. (ACIM) (the investment advisor), as the valuation designee, pursuant to its valuation policies and procedures. The Board of Trustees oversees the valuation designee and reviews its valuation policies and procedures at least annually. Investments are generally valued at amortized cost, which approximates fair value. If the valuation designee determines that the amortized cost does not reflect an investment’s fair value, such investment is valued as determined in good faith by the valuation designee.

Security Transactions — Security transactions are accounted for as of the trade date. Net realized gains and losses are determined on the identified cost basis, which is also used for federal income tax purposes.

Investment Income — Interest income is recorded on the accrual basis and includes accretion of discounts and amortization of premiums.

Treasury Roll Transactions — The fund purchases a security and at the same time makes a commitment to sell the same security at a future settlement date at a specified price. These types of transactions are known as treasury roll transactions. The difference between the purchase price and the sale price represents interest income reflective of an agreed upon rate between the fund and the counterparty.

Income Tax Status — It is the fund’s policy to distribute substantially all net investment income and net realized gains to shareholders and to otherwise qualify as a regulated investment company under provisions of the Internal Revenue Code. Accordingly, no provision has been made for income taxes. The fund files U.S. federal, state, local and non-U.S. tax returns as applicable. The fund's tax returns are subject to examination by the relevant taxing authority until expiration of the applicable statute of limitations, which is generally three years from the date of filing but can be longer in certain jurisdictions. At this time, management believes there are no uncertain tax positions which, based on their technical merit, would not be sustained upon examination and for which it is reasonably possible that the total amounts of unrecognized tax benefits will significantly change in the next twelve months.

Distributions to Shareholders — Distributions from net investment income, if any, are declared daily and paid monthly. The fund may make capital gains distributions to comply with the distribution requirements of the Internal Revenue Code.

11


Indemnifications — Under the trust’s organizational documents, its officers and trustees are indemnified against certain liabilities arising out of the performance of their duties to the fund. In addition, in the normal course of business, the fund enters into contracts that provide general indemnifications. The maximum exposure under these arrangements is unknown as this would involve future claims that may be made against a fund. The risk of material loss from such claims is considered by management to be remote.

3. Fees and Transactions with Related Parties

Certain officers and trustees of the trust are also officers and/or directors of American Century Companies, Inc. (ACC). ACIM, the trust's distributor, American Century Investment Services, Inc., and the trust's transfer agent, American Century Services, LLC, are wholly owned, directly or indirectly, by ACC.

Management Fees — The trust has entered into a management agreement with ACIM, under which ACIM provides the fund with investment advisory and management services in exchange for a single, unified management fee (the fee). The agreement provides that ACIM will pay all expenses of managing and operating the fund, except brokerage expenses, taxes, interest, fees and expenses of the independent trustees (including legal counsel fees), and extraordinary expenses. The fee is computed and accrued daily based on the daily net assets of the fund and paid monthly in arrears. The fee consists of (1) an Investment Category Fee based on the daily net assets of the fund and certain other accounts managed by the investment advisor that are in the same broad investment category as the fund and (2) a Complex Fee based on the assets of all funds in the American Century Investments family of funds that have the same investment advisor and distributor as the fund. For purposes of determining the Investment Category Fee and Complex Fee, the assets of funds managed by the investment advisor that invest exclusively in the shares of other funds (funds of funds) are not included. In order to maintain a positive yield, ACIM may voluntarily waive a portion of the management fee on a daily basis. The fee waiver may be revised or terminated at any time by the investment advisor without notice. The rates for the Investment Category Fee range from 0.1370% to 0.2500% and the rates for the Complex Fee range from 0.2500% to 0.3100%. The effective annual management fee for the period ended September 30, 2022 was 0.47% before waiver and 0.46% after waiver.

Trustees’ Fees and Expenses — The Board of Trustees is responsible for overseeing the investment advisor’s management and operations of the fund. The trustees receive detailed information about the fund and its investment advisor regularly throughout the year, and meet at least quarterly with management of the investment advisor to review reports about fund operations. The fund’s officers do not receive compensation from the fund.

Interfund Transactions — The fund may enter into security transactions with other American Century Investments funds and other client accounts of the investment advisor, in accordance with the 1940 Act rules and procedures adopted by the Board of Trustees. The rules and procedures require, among other things, that these transactions be effected at the independent current market price of the security. There were no interfund transactions during the period.

4. Fair Value Measurements

The fund’s investments valuation process is based on several considerations and may use multiple inputs to determine the fair value of the investments held by the fund. In conformity with accounting principles generally accepted in the United States of America, the inputs used to determine a valuation are classified into three broad levels.

Level 1 valuation inputs consist of unadjusted quoted prices in an active market for identical investments.

Level 2 valuation inputs consist of direct or indirect observable market data (including quoted prices for comparable investments, evaluations of subsequent market events, interest rates, prepayment speeds, credit risk, etc.). These inputs also consist of quoted prices for identical investments initially expressed in local currencies that are adjusted through translation into U.S. dollars.

Level 3 valuation inputs consist of unobservable data (including a fund’s own assumptions).

The level classification is based on the lowest level input that is significant to the fair valuation measurement. The valuation inputs are not necessarily an indication of the risks associated with investing in these securities or other financial instruments.

As of period end, the fund’s investment securities were classified as Level 2. The Schedule of Investments provides additional information on the fund’s portfolio holdings.
12


5. Federal Tax Information

The book-basis character of distributions made during the year from net investment income or net realized gains may differ from their ultimate characterization for federal income tax purposes. These differences reflect the differing character of certain income items and net realized gains and losses for financial statement and tax purposes, and may result in reclassification among certain capital accounts on the financial statements.

As of March 31, 2022, the fund had accumulated short-term capital losses of $(2,319), which represent net capital loss carryovers that may be used to offset future realized capital gains for federal income tax purposes. The capital loss carryovers may be carried forward for an unlimited period. Future capital loss carryover utilization in any given year may be subject to Internal Revenue Code limitations.
13


Financial Highlights
For a Share Outstanding Throughout the Years Ended March 31 (except as noted)
Per-Share DataRatios and Supplemental Data
Income From Investment Operations:Ratio to Average Net Assets of:
Net Asset
Value,
Beginning
of Period
Net Investment Income (Loss)Net Realized and Unrealized Gain (Loss)Total From Investment OperationsDistributions From
Net
Investment
Income
Net Asset
Value,
End
of Period
Total
Return(1)
Operating
Expenses
Operating
Expenses
(before
expense
waiver)
Net
Investment
Income
(Loss)
Net Investment Income (Loss) (before expense waiver)Net
Assets,
End of
Period
(in thousands)
Investor Class
2022(2)
$1.00
(3)
(3)
(3)
(3)
$1.000.45%
0.47%(4)
0.48%(4)
0.89%(4)
0.88%(4)
$2,207,319 
2022$1.00
(3)
(3)
(3)
(3)
$1.000.01%0.08%0.48%0.01%(0.39)%$2,195,618 
2021$1.00
(3)
(3)
(3)
(3)
$1.000.01%0.21%0.48%0.01%(0.26)%$2,286,880 
2020$1.000.01
(3)
0.01(0.01)$1.001.49%0.48%0.48%1.48%1.48%$2,174,827 
2019$1.000.02
(3)
0.02(0.02)$1.001.63%0.48%0.48%1.62%1.62%$2,091,234 
2018$1.000.01
(3)
0.01(0.01)$1.000.63%0.48%0.48%0.62%0.62%$2,067,473 

Notes to Financial Highlights
(1)Total returns are calculated based on the net asset value of the last business day. Total returns for periods less than one year are not annualized.
(2)Six months ended September 30, 2022 (unaudited).
(3)Per-share amount was less than $0.005.
(4)Annualized.


See Notes to Financial Statements.



Approval of Management Agreement

At a meeting held on June 21, 2022, the Fund’s Board of Trustees (the "Board") unanimously approved the renewal of the management agreement pursuant to which American Century Investment Management, Inc. (the “Advisor”) acts as the investment advisor for the Fund. Under Section 15(c) of the Investment Company Act of 1940 (the “Investment Company Act”), contracts for investment advisory services are required to be reviewed, evaluated, and approved by a majority of a fund’s Trustees, including a majority of the independent Trustees, each year. The Board regards this annual evaluation and renewal as one of its most important responsibilities.

The independent Trustees have memorialized a statement regarding the relationship between their ongoing obligations to oversee and evaluate the performance of the Advisor and their annual consideration of renewal of the management agreement. In that statement, the independent Trustees noted that their assessment of the Advisor’s performance is an ongoing process that takes place over the entire year and is informed by all of the extensive information that the Board and its committees receive and consider over time. This information, together with the additional materials provided specifically in connection with the review, are central to the Board’s assessment of the Advisor’s performance and its determination whether to renew the Fund’s management agreement.

Prior to its consideration of the renewal of the management agreement, the Board requested and reviewed data and analysis relating to the proposed renewal. This information and analysis was compiled by the Advisor and certain independent providers of evaluation data concerning the Fund.

In connection with its consideration of the renewal of the management agreement, the Board’s review and evaluation of the services provided by the Advisor and its affiliates included, but was not limited to, the following:

the nature, extent, and quality of investment management, shareholder services, and other services provided and to be provided to the Fund including without limitation portfolio management and trading services, shareholder and intermediary service levels and quality, compliance and legal services, fund accounting and financial reporting, and fund share distribution;
the wide range of other programs and services provided by the Advisor and its affiliates to the Fund and its shareholders on a routine and non-routine basis;
the Fund’s investment performance, including data comparing the Fund’s performance to appropriate benchmarks and/or a peer group of other mutual funds with similar investment objectives and strategies;
the cost of owning the Fund compared to the cost of owning similarly-managed funds;
the compliance policies, procedures, and regulatory experience of the Advisor and its affiliates and certain other Fund service providers;
financial data showing the cost of services provided by the Advisor and its affiliates to the Fund, the profitability of the Fund to the Advisor, and the overall profitability of the Advisor;
the Advisor’s strategic plans, generally, and with respect to the ongoing impact of the COVID-19 pandemic response, heightened areas of interest in the mutual fund industry and recent geopolitical issues;
the Advisor’s business continuity plans, vendor management practices, and cyber security practices;
any economies of scale associated with the Advisor’s management of the Fund;
services provided and charges to the Advisor’s other investment management clients;
fees and expenses associated with any investment by the Fund in other funds;
payments and practices in connection with financial intermediaries holding shares of the Fund on behalf of their clients and the services provided by intermediaries in connection therewith; and
any collateral benefits derived by the Advisor from the management of the Fund.
15


In keeping with its practice, the Board held two meetings and the independent Trustees met in private session to discuss the renewal and to review and discuss the information provided in response to their request. The Board held active discussions with the Advisor regarding the renewal of the management agreement. The independent Trustees had the benefit of the advice of their independent counsel throughout the process.

Factors Considered

The Trustees considered all of the information provided by the Advisor, the independent data providers, and the independent Trustees’ independent counsel in connection with the approval. They determined that the information was sufficient for them to evaluate the management agreement for the Fund. In connection with their review, the Trustees did not identify any single factor as being all-important or controlling and each Trustee may have attributed different levels of importance to different factors. In deciding to renew the management agreement, the Board based its decision on a number of factors, including the following:

Nature, Extent and Quality of Services — Generally. Under the management agreement, the Advisor is responsible for providing or arranging for all services necessary for the operation of the Fund. The Board noted that the Advisor provides or arranges at its own expense a wide variety of services including:

constructing and designing the Fund
portfolio research and security selection
initial capitalization/funding
securities trading
Fund administration
custody of Fund assets
daily valuation of the Fund’s portfolio
shareholder servicing and transfer agency, including shareholder confirmations, recordkeeping, and communications
legal services (except the independent Trustees’ counsel)
regulatory and portfolio compliance
financial reporting
marketing and distribution (except amounts paid by the Fund under Rule 12b-1 plans)

The Board noted that many of these services have expanded over time in terms of both quantity and complexity in response to shareholder demands, competition in the industry, changing distribution channels, and the changing regulatory environment.

Investment Management Services. The nature of the investment management services provided to the Fund is quite complex and allows Fund shareholders access to professional money management, instant diversification of their investments within an asset class, the opportunity to easily diversify among asset classes by investing in or exchanging among various American Century Investments funds, and liquidity. In evaluating investment performance, the Board expects the Advisor to manage the Fund in accordance with its investment objectives and principal investment strategies. Further, the Trustees recognize that the Advisor has an obligation to seek the best execution of fund trades. In providing these services, the Advisor utilizes teams of investment professionals (portfolio managers, analysts, research assistants, and securities traders) who require extensive information technology, research, training, compliance, and other systems to conduct their business. The Board, directly and through its Portfolio Committee, regularly reviews investment performance information for the Fund, together with comparative information for appropriate benchmarks and/or peer groups of similarly-managed funds, over different time horizons. The Trustees also review investment performance information during the management agreement renewal process. If performance concerns are identified, the Fund receives special reviews until performance improves, during which the Board discusses with the Advisor the reasons for such results (e.g., market conditions, security selection) and any actions being taken to improve performance. The Fund’s performance was above the median of its peer group for the three-year period, and below the median of its peer group for the one-, five-, and ten-year periods
16


reviewed by the Board. The Board found the investment management services provided by the Advisor to the Fund to be satisfactory and consistent with the management agreement.

Shareholder and Other Services. Under the management agreement, the Advisor, either directly or through affiliates or third parties, provides the Fund with a comprehensive package of transfer agency, shareholder, and other services. The Board, directly and through its various committees, regularly reviews reports and evaluations of such services at its regular meetings. These reports include, but are not limited to, information regarding the operational efficiency and accuracy of the shareholder and transfer agency services provided, staffing levels, shareholder satisfaction, technology support (including cyber security), new products and services offered to Fund shareholders, securities trading activities, portfolio valuation services, auditing services, and legal and operational compliance activities. The Board found the services provided by the Advisor to the Fund under the management agreement to be competitive and of high quality.

Costs of Services and Profitability. The Advisor provides detailed information concerning its cost of providing various services to the Fund, its profitability in managing the Fund, its overall profitability, and its financial condition. The Trustees have reviewed with the Advisor the methodology used to prepare this financial information. This information is considered in evaluating the Advisor’s financial condition, its ability to continue to provide services under the management agreement, and the reasonableness of the current management fee. The Board concluded that the Advisor’s profits were reasonable in light of the services provided to the Fund.

Ethics. The Board generally considers the Advisor’s commitment to providing quality services to shareholders and to conducting its business ethically. They noted that the Advisor’s practices generally meet or exceed industry best practices.

Economies of Scale. The Board also reviewed information provided by the Advisor regarding the possible existence of economies of scale in connection with the management of the Fund. The Board concluded that economies of scale are difficult to measure and predict with precision, especially on a fund-by-fund basis. The Board concluded that the Advisor is appropriately sharing economies of scale, to the extent they exist, through its fee structure and through reinvestment in its business, infrastructure, investment capabilities and initiatives to provide shareholders enhanced and expanded services.

Comparison to Other Funds’ Fees. The management agreement provides that the Fund pays the Advisor a single, all-inclusive (or unified) management fee for providing all services necessary for the management and operation of the Fund, other than securities transaction expenses, taxes, interest, extraordinary expenses, fees and expenses of the Fund’s independent Trustees (including their independent legal counsel), and expenses incurred in connection with the provision of shareholder services and distribution services under a plan adopted pursuant to Rule 12b-1 under the Investment Company Act. Under this unified fee structure, the Advisor is responsible for providing all investment advisory, custody, audit, administrative, compliance, recordkeeping, marketing, and shareholder services, or arranging and supervising third parties to provide such services. By contrast, most other funds are charged a variety of fees, including an investment advisory fee, a transfer agency fee, an administrative fee, and other expenses. Other than their investment advisory fees and any applicable Rule 12b-1 distribution fees, all other components of the total fees charged by these other funds may be increased without shareholder approval. The Board believes the unified fee structure is a benefit to Fund shareholders because it clearly discloses to shareholders the cost of owning Fund shares, and, since the unified fee cannot be increased without a vote of Fund shareholders, it shifts to the Advisor the risk of increased costs of operating the Fund and provides a direct incentive to minimize administrative inefficiencies. Part of the Board’s analysis of fee levels involves reviewing certain evaluative data compiled by an independent provider and comparing the Fund’s unified fee to the total expense ratio of peer funds. Given the broad proliferation of fee waivers to support positive money market fund yields and the wide variance of expenses waived, the Board recognized that net fee comparisons may not be a reliable analysis of fund expenses. With that in mind, the Board reviewed peer data both on a gross basis and net of applicable waivers. The Board concluded that the management fee paid by the
17


Fund to the Advisor under the management agreement is reasonable in light of the services provided to the Fund.

Comparison to Fees and Services Provided to Other Clients of the Advisor. The Board also requested and received information from the Advisor concerning the nature of the services, fees, costs, and profitability of its advisory services to advisory clients other than the Fund. They observed that these varying types of client accounts require different services and involve different regulatory and entrepreneurial risks than the management of the Fund. The Board analyzed this information and concluded that the fees charged and services provided to the Fund were reasonable by comparison.

Payments to Intermediaries. The Trustees also requested and received a description of payments made to intermediaries by the Fund and the Advisor and services provided by intermediaries. These payments include various payments made by the Fund or the Advisor to different types of intermediaries and recordkeepers for distribution and service activities provided with respect to the Fund. The Trustees reviewed such information and received representations from the Advisor that all such payments by the Fund were made pursuant to the Fund’s Rule 12b-1 Plan and that all such payments by the Advisor were made from the Advisor’s resources and reasonable profits.

Collateral or “Fall-Out” Benefits Derived by the Advisor. The Board considered the possible existence of collateral benefits the Advisor may receive as a result of its relationship with the Fund. The Board noted that the Advisor’s primary business is managing funds and it generally does not use fund or shareholder information to generate profits in other lines of business, and therefore does not derive any significant collateral benefits from them. The Board noted that the Advisor may receive proprietary research from broker-dealers that execute fund portfolio transactions. The Board also determined that the Advisor is able to provide investment management services to certain clients other than the Fund, at least in part, due to its existing infrastructure built to serve the fund complex. The Board also noted that the assets of those other accounts are, where applicable, included with the assets of the Fund to determine breakpoints in the management fee schedule.

Existing Relationship. The Board also considered whether there was any reason for not continuing the existing arrangement with the Advisor. In this regard, the Board was mindful of the potential disruptions of the Fund’s operations and various risks, uncertainties, and other effects that could occur as a result of a decision not to continue such relationship. In particular, the Board recognized that most shareholders have invested in the Fund on the strength of the Advisor’s industry standing and reputation and in the expectation that the Advisor will have a continuing role in providing advisory services to the Fund.

Conclusion of the Trustees. As a result of this process, the Board, including all of the independent Trustees, taking into account all of the factors discussed above and the information provided by the Advisor and others in connection with its review and throughout the year, concluded that the terms of the management agreement are fair and reasonable and that the management fee charged to the Fund is reasonable in light of the services provided and that the management agreement between the Fund and the Advisor should be renewed for an additional one-year period.






18


Additional Information

Retirement Account Information

As required by law, distributions you receive from certain retirement accounts are subject to federal income tax withholding, unless you elect not to have withholding apply*. Tax will be withheld on the total amount withdrawn even though you may be receiving amounts that are not subject to withholding, such as nondeductible contributions. In such case, excess amounts of withholding could occur. You may adjust your withholding election so that a greater or lesser amount will be withheld.

If you don’t want us to withhold on this amount, you must notify us to not withhold the federal income tax. You may notify us in writing or in certain situations by telephone or through other electronic means. For systematic withdrawals, your withholding election will remain in effect until revoked or changed by filing a new election. You have the right to revoke your election at any time and change your withholding percentage for future distributions.

Remember, even if you elect not to have income tax withheld, you are liable for paying income tax on the taxable portion of your withdrawal. If you elect not to have income tax withheld or you don’t have enough income tax withheld, you may be responsible for payment of estimated tax. You may incur penalties under the estimated tax rules if your withholding and estimated tax payments are not sufficient. You can reduce or defer the income tax on a distribution by directly or indirectly rolling such distribution over to another IRA or eligible plan. You should consult your tax advisor for additional information.

State tax will be withheld if, at the time of your distribution, your address is within one of the mandatory withholding states and you have federal income tax withheld (or as otherwise required by state law). State taxes will be withheld from your distribution in accordance with the respective state rules.

*Some 403(b), 457 and qualified retirement plan distributions may be subject to 20% mandatory withholding, as they are subject to special tax and withholding rules.  Your plan administrator or plan sponsor is required to provide you with a special tax notice explaining those rules at the time you request a distribution.  If applicable, federal and/or state taxes may be withheld from your distribution amount.


Proxy Voting Policies

Descriptions of the principles and policies that the fund's investment advisor uses in exercising the voting rights associated with the securities purchased and/or held by the fund are available without charge, upon request, by calling 1-800-345-2021 or visiting American Century Investments’ website at americancentury.com/proxy. A description of the policies is also available on the Securities and Exchange Commission’s website at sec.gov. Information regarding how the investment advisor voted proxies relating to portfolio securities during the most recent 12-month period ended June 30 is available on americancentury.com/proxy. It is also available at sec.gov.


Portfolio Holdings Disclosure
The fund files its complete schedule of portfolio holdings with the Securities and Exchange Commission (SEC) each month on Form N-MFP. The fund’s Form N-MFP reports are available on its website at americancentury.com and on the SEC’s website at sec.gov. The fund also makes its complete schedule of portfolio holdings for the most recent first and third quarters of its fiscal year available on its website at americancentury.com and, upon request, by calling 1-800-345-2021.


19


Notes

20






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Contact Usamericancentury.com
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Investor Services Representative1-800-345-2021
or 816-531-5575
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American Century Government Income Trust
Investment Advisor:
American Century Investment Management, Inc.
Kansas City, Missouri
This report and the statements it contains are submitted for the general information of our shareholders. The report is not authorized for distribution to prospective investors unless preceded or accompanied by an effective prospectus.
©2022 American Century Proprietary Holdings, Inc. All rights reserved.
CL-SAN-90808 2211




    


acihorizblkd45.jpg
Semiannual Report
September 30, 2022
Ginnie Mae Fund
Investor Class (BGNMX)
I Class (AGMHX)
A Class (BGNAX)
C Class (BGNCX)
R Class (AGMWX)
R5 Class (AGMNX)

















Table of Contents
President’s Letter
Fund Characteristics
Shareholder Fee Example
Schedule of Investments
Statement of Assets and Liabilities
Statement of Operations
Statement of Changes in Net Assets
Notes to Financial Statements
Financial Highlights
Approval of Management Agreement
Additional Information




























Any opinions expressed in this report reflect those of the author as of the date of the report, and do not necessarily represent the opinions of American Century Investments® or any other person in the American Century Investments organization. Any such opinions are subject to change at any time based upon market or other conditions and American Century Investments disclaims any responsibility to update such opinions. These opinions may not be relied upon as investment advice and, because investment decisions made by American Century Investments funds are based on numerous factors, may not be relied upon as an indication of trading intent on behalf of any American Century Investments fund. Security examples are used for representational purposes only and are not intended as recommendations to purchase or sell securities. Performance information for comparative indices and securities is provided to American Century Investments by third party vendors. To the best of American Century Investments’ knowledge, such information is accurate at the time of printing.



President’s Letter
image6.jpg Jonathan Thomas

Dear Investor:

Thank you for reviewing this semiannual report for the period ending September 30, 2022. It provides a market overview (below), followed by a schedule of fund investments and other financial information. For additional investment insights, please visit americancentury.com.

Inflation, Rates, Recession Worries Weighed on Financial Markets

The reporting period began with financial markets digesting the effects of soaring inflation, heightened market volatility and slowing growth. For more than a year, the effects of massive fiscal and monetary support, escalating energy prices, supply chain breakdowns and labor market shortages had driven inflation to multidecade highs. The Russia-Ukraine war continued to nudge commodity prices even higher, exacerbating existing inflationary pressures and further damaging global supply chains.

The Federal Reserve (Fed), which began tightening in March with a 25-basis-points (bps) hike, increased rates an additional 275 bps during the six-month period. Inflation was slow to respond, climbing to a 40-year-high 9.1% in June before slipping to 8.2% in September, largely due to falling gasoline prices. Policymakers indicated taming inflation remains their priority, even as the economy contracted in 2022’s first two quarters and an official recession appeared imminent.

In addition to fueling recession risk, the combination of elevated inflation and a hawkish Fed helped push Treasury yields sharply higher and stock prices significantly lower. Amid persistent market unrest, most stock and bond indices ended the six-month period with steep losses. Stocks, as measured by the S&P 500 Index, plunged more than 20%, while bonds, as measured by the Bloomberg U.S. Aggregate Bond Index, tumbled more than 9%.

Staying Disciplined in Uncertain Times

We expect market volatility to linger as investors navigate a complex environment of high inflation, rising interest rates and economic uncertainty. In addition, Russia’s invasion of Ukraine complicates an increasingly tense geopolitical backdrop and threatens global energy markets. We will continue to monitor this evolving situation and what it broadly means for investors across asset classes.

We appreciate your confidence in us during these extraordinary times. Our firm has a long history of helping clients weather unpredictable markets, and we’re confident we will continue to meet today’s challenges.

Sincerely,
image48a16.jpg
Jonathan Thomas
President and Chief Executive Officer
American Century Investments
2


Fund Characteristics 
SEPTEMBER 30, 2022
Types of Investments in Portfolio% of net assets
U.S. Government Agency Mortgage-Backed Securities (all GNMAs)99.9%
U.S. Government Agency Collateralized Mortgage Obligations (all GNMAs)2.9%
Short-Term Investments0.6%
Other Assets and Liabilities(3.4)%
3


Shareholder Fee Example 

Fund shareholders may incur two types of costs: (1) transaction costs, including sales charges (loads) on purchase payments and redemption/exchange fees; and (2) ongoing costs, including management fees; distribution and service (12b-1) fees; and other fund expenses. This example is intended to help you understand your ongoing costs (in dollars) of investing in your fund and to compare these costs with the ongoing cost of investing in other mutual funds.

The example is based on an investment of $1,000 made at the beginning of the period and held for the entire period from April 1, 2022 to September 30, 2022.

Actual Expenses

The table provides information about actual account values and actual expenses for each class. You may use the information, together with the amount you invested, to estimate the expenses that you paid over the period. First, identify the share class you own. Then simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number under the heading “Expenses Paid During Period” to estimate the expenses you paid on your account during this period.

If you hold Investor Class shares of any American Century Investments mutual fund, or I Class shares of the American Century Diversified Bond Fund, in an American Century Investments account (i.e., not through a financial intermediary or employer-sponsored retirement plan account), American Century Investments may charge you a $25 annual account maintenance fee if the value of those shares is less than $10,000. We will redeem shares automatically in one of your accounts to pay the $25 fee. In determining your total eligible investment amount, we will include your investments in all personal accounts (including American Century Investments brokerage accounts) registered under your Social Security number. Personal accounts include individual accounts, joint accounts, UGMA/UTMA accounts, personal trusts, Coverdell Education Savings Accounts and IRAs (including traditional, Roth, Rollover, SEP-, SARSEP- and SIMPLE-IRAs), and certain other retirement accounts. If you have only business, business retirement, employer-sponsored or American Century Investments brokerage accounts, you are currently not subject to this fee. If you are subject to the account maintenance fee, your account value could be reduced by the fee amount.

Hypothetical Example for Comparison Purposes

The table also provides information about hypothetical account values and hypothetical expenses based on the actual expense ratio of each class of your fund and an assumed rate of return of 5% per year before expenses, which is not the actual return of a fund’s share class. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in your fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds.

Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transactional costs, such as sales charges (loads) or redemption/exchange fees. Therefore, the table is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. In addition, if these transactional costs were included, your costs would have been higher.

4


Beginning
Account Value
4/1/22
Ending
Account Value
9/30/22
Expenses Paid
During Period(1)
4/1/22 - 9/30/22
Annualized
Expense Ratio(1)
Actual
Investor Class$1,000$910.10$2.630.55%
I Class$1,000$910.70$2.160.45%
A Class$1,000$909.00$3.830.80%
C Class$1,000$905.60$7.401.55%
R Class$1,000$907.80$5.021.05%
R5 Class$1,000$911.10$1.680.35%
Hypothetical
Investor Class$1,000$1,022.31$2.790.55%
I Class$1,000$1,022.81$2.280.45%
A Class$1,000$1,021.06$4.050.80%
C Class$1,000$1,017.30$7.841.55%
R Class$1,000$1,019.80$5.321.05%
R5 Class$1,000$1,023.31$1.780.35%
(1)Expenses are equal to the class's annualized expense ratio listed in the table above, multiplied by the average account value over the period, multiplied by 183, the number of days in the most recent fiscal half-year, divided by 365, to reflect the one-half year period. Annualized expense ratio reflects actual expenses, including any applicable fee waivers or expense reimbursements and excluding any acquired fund fees and expenses.
5


Schedule of Investments

SEPTEMBER 30, 2022 (UNAUDITED)
Principal Amount/
Shares
Value
U.S. GOVERNMENT AGENCY MORTGAGE-BACKED SECURITIES — 99.9%
Adjustable-Rate U.S. Government Agency Mortgage-Backed Securities — 2.6%
GNMA, VRN, 1.75%, (1-year H15T1Y plus 1.50%), 10/20/27 to 10/20/35$1,750,758 $1,715,559 
GNMA, VRN, 2.625%, (1-year H15T1Y plus 1.50%), 2/20/342,110,484 2,099,217 
GNMA, VRN, 1.625%, (1-year H15T1Y plus 1.50%), 8/20/36 to 8/20/474,080,203 4,021,623 
GNMA, VRN, 2.875%, (1-year H15T1Y plus 1.50%), 4/20/381,889,216 1,885,849 
GNMA, VRN, 2.50%, (1-year H15T1Y plus 1.50%), 3/20/481,841,311 1,828,683 
GNMA, VRN, 3.50%, (1-year H15T1Y plus 1.50%), 8/20/491,592,536 1,555,537 
13,106,468 
Fixed-Rate U.S. Government Agency Mortgage-Backed Securities — 97.3%
GNMA, 4.00%, TBA6,448,000 6,023,087 
GNMA, 5.50%, TBA10,500,000 10,495,078 
GNMA, 8.50%, 1/20/23 to 12/15/3043,712 46,438 
GNMA, 8.00%, 2/15/23 to 7/20/30103,797 104,713 
GNMA, 7.25%, 6/15/232,138 2,139 
GNMA, 6.50%, 9/20/23 to 11/15/381,135,715 1,184,437 
GNMA, 7.50%, 12/20/23 to 2/20/3148,983 51,748 
GNMA, 9.00%, 12/15/24910 911 
GNMA, 9.50%, 12/20/24 to 7/20/2511,368 11,395 
GNMA, 9.25%, 3/15/2513,225 13,243 
GNMA, 7.00%, 12/20/25 to 12/20/29207,457 216,594 
GNMA, 6.00%, 2/20/26 to 2/20/398,237,734 8,782,174 
GNMA, 8.75%, 7/15/2719,449 19,471 
GNMA, 5.50%, 4/15/33 to 8/15/3910,142,208 10,633,155 
GNMA, 4.50%, 7/15/33 to 3/20/4213,185,016 13,018,312 
GNMA, 4.00%, 12/20/39 to 11/20/5145,818,291 43,503,451 
GNMA, 5.00%, 6/20/40 to 5/20/416,843,336 6,916,203 
GNMA, 3.50%, 12/20/41 to 10/20/5075,767,071 70,029,205 
GNMA, 3.00%, 2/20/43 to 2/20/52108,657,657 96,824,279 
GNMA, 2.50%, 7/20/46 to 9/20/51126,754,150 108,992,807 
GNMA, 2.00%, 10/20/50 to 11/20/51110,776,436 91,937,259 
GNMA, 3.50%, 2/20/52(1)
13,737,894 12,561,084 
481,367,183 
TOTAL U.S. GOVERNMENT AGENCY MORTGAGE-BACKED SECURITIES
(Cost $555,322,518)
494,473,651 
U.S. GOVERNMENT AGENCY COLLATERALIZED MORTGAGE OBLIGATIONS — 2.9%
GNMA, Series 2002-13, Class FA, VRN, 3.44%, (1-month LIBOR plus 0.50%), 2/16/32145,194 145,203 
GNMA, Series 2003-110, Class F, VRN, 3.41%, (1-month LIBOR plus 0.40%), 10/20/33596,525 596,485 
GNMA, Series 2003-66, Class HF, VRN, 3.46%, (1-month LIBOR plus 0.45%), 8/20/33314,282 314,537 
GNMA, Series 2004-76, Class F, VRN, 3.41%, (1-month LIBOR plus 0.40%), 9/20/34573,725 573,576 
GNMA, Series 2005-13, Class FA, VRN, 3.21%, (1-month LIBOR plus 0.20%), 2/20/351,174,779 1,164,238 
GNMA, Series 2007-5, Class FA, VRN, 3.15%, (1-month LIBOR plus 0.14%), 2/20/371,221,293 1,216,734 
6


Principal Amount/
Shares
Value
GNMA, Series 2007-58, Class FC, VRN, 3.51%, (1-month LIBOR plus 0.50%), 10/20/37$733,125 $734,419 
GNMA, Series 2008-2, Class LF, VRN, 3.47%, (1-month LIBOR plus 0.46%), 1/20/38911,294 908,990 
GNMA, Series 2008-27, Class FB, VRN, 3.56%, (1-month LIBOR plus 0.55%), 3/20/381,677,326 1,682,190 
GNMA, Series 2008-61, Class KF, VRN, 3.68%, (1-month LIBOR plus 0.67%), 7/20/38829,618 832,785 
GNMA, Series 2008-88, Class UF, VRN, 4.01%, (1-month LIBOR plus 1.00%), 10/20/38744,871 747,878 
GNMA, Series 2009-76, Class FB, VRN, 3.54%, (1-month LIBOR plus 0.60%), 6/16/3916,645 16,647 
GNMA, Series 2009-92, Class FJ, VRN, 3.62%, (1-month LIBOR plus 0.68%), 10/16/39440,827 443,093 
GNMA, Series 2021-151, Class AB SEQ, 1.75%, 2/16/623,083,186 2,615,490 
GNMA, Series 2021-164, Class AH SEQ, 1.50%, 10/16/632,734,636 2,218,447 
14,210,712 
TOTAL U.S. GOVERNMENT AGENCY COLLATERALIZED MORTGAGE OBLIGATIONS
(Cost $15,242,150)
14,210,712 
SHORT-TERM INVESTMENTS(2) — 0.6%


Money Market Funds
State Street Institutional U.S. Government Money Market Fund, Premier Class
5,616 5,616 
Repurchase Agreements — 0.6%
BMO Capital Markets Corp., (collateralized by various U.S. Treasury obligations, 0.625% - 4.625%, 1/15/25 - 5/15/47, valued at $541,784), in a joint trading account at 2.86%, dated 9/30/22, due 10/3/22 (Delivery value $532,702)532,575 
Fixed Income Clearing Corp., (collateralized by various U.S. Treasury obligations, 3.25%, 6/30/29, valued at $2,713,277), at 2.95%, dated 9/30/22, due 10/3/22 (Delivery value $2,660,654)2,660,000 
3,192,575 
TOTAL SHORT-TERM INVESTMENTS
(Cost $3,198,191)
3,198,191 
TOTAL INVESTMENT SECURITIES — 103.4%
(Cost $573,762,859)

511,882,554 
OTHER ASSETS AND LIABILITIES — (3.4)%

(16,904,348)
TOTAL NET ASSETS — 100.0%

$494,978,206 

FUTURES CONTRACTS PURCHASED
Reference EntityContractsExpiration DateNotional
Amount
Unrealized
Appreciation
(Depreciation)^
U.S. Treasury 10-Year Notes25 December 2022$2,801,563 $(84,705)
U.S. Treasury 10-Year Ultra Notes54 December 20226,398,156 (246,479)
U.S. Treasury Long Bonds128 December 202216,180,000 (894,290)
U.S. Treasury Ultra Bonds50 December 20226,850,000 (586,855)
$32,229,719 $(1,812,329)
^Amount represents value and unrealized appreciation (depreciation).

7


FUTURES CONTRACTS SOLD
Reference EntityContractsExpiration DateNotional
Amount
Unrealized
Appreciation
(Depreciation)^
U.S. Treasury 2-Year Notes64December 2022$13,145,000 $198,375 
U.S. Treasury 5-Year Notes157December 202216,878,727 536,117 
$30,023,727 $734,492 
^Amount represents value and unrealized appreciation (depreciation).

NOTES TO SCHEDULE OF INVESTMENTS
GNMA-Government National Mortgage Association
H15T1Y-Constant Maturity U.S. Treasury Note Yield Curve Rate Index
LIBOR-London Interbank Offered Rate
SEQ-Sequential Payer
TBA-To-Be-Announced. Security was purchased on a forward commitment basis with an approximate principal amount and maturity date. Actual principal amount and maturity date will be determined upon settlement.
VRN-Variable Rate Note. The rate adjusts periodically based upon the terms set forth in the security’s offering documents. The rate shown is effective at the period end and the reference rate and spread, if any, is indicated. The security's effective maturity date may be shorter than the final maturity date shown.
Category is less than 0.05% of total net assets.
(1)Security, or a portion thereof, has been pledged at the custodian bank or with a broker for collateral requirements on forward commitments and/or futures contracts. At the period end, the aggregate value of securities pledged was $2,594,891.
(2)Category includes securities purchased with cash collateral received at the custodian bank for collateral requirements on forward commitments. At the period end, the aggregate value of cash deposits received was $570,000.


See Notes to Financial Statements.
8


Statement of Assets and Liabilities
SEPTEMBER 30, 2022 (UNAUDITED)
Assets
Investment securities, at value (cost of $573,762,859)$511,882,554 
Receivable for investments sold11,159,872 
Receivable for capital shares sold70,895 
Interest receivable1,401,183 
524,514,504 
Liabilities
Payable for collateral received for forward commitments570,000 
Payable for investments purchased28,033,361 
Payable for capital shares redeemed493,275 
Payable for variation margin on futures contracts135,145 
Accrued management fees219,836 
Distribution and service fees payable7,287 
Dividends payable77,394 
29,536,298 
Net Assets$494,978,206 
Net Assets Consist of:
Capital paid in$640,357,496 
Distributable earnings(145,379,290)
$494,978,206 

Net AssetsShares OutstandingNet Asset Value Per Share*
Investor Class$409,035,81946,211,877$8.85
I Class$27,914,9763,152,801$8.85
A Class$10,017,5141,131,799$8.85
C Class$627,84370,929$8.85
R Class$10,984,6571,241,734$8.85
R5 Class$36,397,3974,112,493$8.85
*Maximum offering price per share was equal to the net asset value per share for all share classes, except Class A, for which the maximum offering price per share was $9.27 (net asset value divided by 0.955). A contingent deferred sales charge may be imposed on redemptions of Class A and Class C.


See Notes to Financial Statements.
9


Statement of Operations
FOR THE SIX MONTHS ENDED SEPTEMBER 30, 2022 (UNAUDITED)
Investment Income (Loss)
Income:
Interest$6,509,389 
Expenses:
Management fees1,432,703 
Distribution and service fees:
A Class15,101 
C Class3,425 
R Class31,700 
Trustees' fees and expenses19,177 
Other expenses1,955 
1,504,061 
Net investment income (loss)5,005,328 
Realized and Unrealized Gain (Loss)
Net realized gain (loss) on:
Investment transactions(11,583,516)
Futures contract transactions(1,387,153)
(12,970,669)
Change in net unrealized appreciation (depreciation) on:
Investments(42,353,998)
Futures contracts(841,668)
(43,195,666)
Net realized and unrealized gain (loss)(56,166,335)
Net Increase (Decrease) in Net Assets Resulting from Operations$(51,161,007)


See Notes to Financial Statements.
10


Statement of Changes in Net Assets
SIX MONTHS ENDED SEPTEMBER 30, 2022 (UNAUDITED) AND YEAR ENDED MARCH 31, 2022
Increase (Decrease) in Net AssetsSeptember 30, 2022March 31, 2022
Operations
Net investment income (loss)$5,005,328 $5,785,515 
Net realized gain (loss)(12,970,669)426,024 
Change in net unrealized appreciation (depreciation)(43,195,666)(42,404,216)
Net increase (decrease) in net assets resulting from operations(51,161,007)(36,192,677)
Distributions to Shareholders
From earnings:
Investor Class(5,386,580)(9,851,486)
I Class(408,923)(1,899,118)
A Class(127,186)(251,504)
C Class(4,671)(7,972)
R Class(118,149)(189,575)
R5 Class(530,461)(1,085,116)
Decrease in net assets from distributions(6,575,970)(13,284,771)
Capital Share Transactions
Net increase (decrease) in net assets from capital share transactions (Note 5)(50,502,224)(317,530,716)
Net increase (decrease) in net assets(108,239,201)(367,008,164)
Net Assets
Beginning of period603,217,407 970,225,571 
End of period$494,978,206 $603,217,407 


See Notes to Financial Statements.
11


Notes to Financial Statements

SEPTEMBER 30, 2022 (UNAUDITED)

1. Organization

American Century Government Income Trust (the trust) is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company and is organized as a Massachusetts business trust. Ginnie Mae Fund (the fund) is one fund in a series issued by the trust. The fund’s investment objective is to seek high current income while maintaining liquidity and safety of principal by investing primarily in Government National Mortgage Association certificates.

The fund offers the Investor Class, I Class, A Class, C Class, R Class and R5 Class. The A Class may incur an initial sales charge. The A Class and C Class may be subject to a contingent deferred sales charge.

2. Significant Accounting Policies

The following is a summary of significant accounting policies consistently followed by the fund in preparation of its financial statements. The fund is an investment company and follows accounting and reporting guidance in accordance with accounting principles generally accepted in the United States of America. This may require management to make certain estimates and assumptions at the date of the financial statements. Actual results could differ from these estimates. Management evaluated the impact of events or transactions occurring through the date the financial statements were issued that would merit recognition or disclosure.

Investment Valuations — The fund determines the fair value of its investments and computes its net asset value (NAV) per share at the close of regular trading (usually 4 p.m. Eastern time) on the New York Stock Exchange (NYSE) on each day the NYSE is open. The value of investments of the fund is determined by American Century Investment Management, Inc. (ACIM) (the investment advisor), as the valuation designee, pursuant to its valuation policies and procedures. The Board of Trustees oversees the valuation designee and reviews its valuation policies and procedures at least annually.

Fixed income securities are valued at the evaluated mean as provided by independent pricing services or at the mean of the most recent bid and asked prices as provided by investment dealers. U.S. Treasury and Government Agency securities are valued using market models that consider trade data, quotations from dealers and active market makers, relevant yield curve and spread data, creditworthiness, trade data or market information on comparable securities, and other relevant security specific information. Mortgage-related and asset-backed securities are valued based on models that consider trade data, prepayment and default projections, benchmark yield and spread data and estimated cash flows of each tranche of the issuer.

Open-end management investment companies are valued at the reported NAV per share. Repurchase agreements are valued at cost, which approximates fair value. Exchange-traded futures contracts are valued at the settlement price as provided by the appropriate exchange.

If the valuation designee determines that the market price for a portfolio security is not readily available or is believed by the valuation designee to be unreliable, such security is valued at fair value as determined in good faith by the valuation designee, in accordance with its policies and procedures. Circumstances that may cause the fund to determine that market quotations are not available or reliable include, but are not limited to: when there is a significant event subsequent to the market quotation; trading in a security has been halted during the trading day; or trading in a security is insufficient or did not take place due to a closure or holiday.

The valuation designee monitors for significant events occurring after the close of an investment’s primary exchange but before the fund’s NAV per share is determined. Significant events may include, but are not limited to: corporate announcements and transactions; regulatory news, governmental action and political unrest that could impact a specific investment or an investment sector; or armed conflicts, natural disasters and similar events that could affect investments in a specific country or region.

Security Transactions — Security transactions are accounted for as of the trade date. Net realized gains and losses are determined on the identified cost basis, which is also used for federal income tax purposes.

12


Investment Income — Interest income is recorded on the accrual basis and includes paydown gain (loss) and accretion of discounts and amortization of premiums.

Forward Commitments — The fund may engage in securities transactions on a forward commitment basis. In these transactions, the securities’ prices and yields are fixed on the date of the commitment. The fund may sell a to-be-announced (TBA) security and at the same time make a commitment to purchase the same security at a future date at a specified price. Conversely, the fund may purchase a TBA security and at the same time make a commitment to sell the same security at a future date at a specified price. These types of transactions are known as “TBA roll” transactions and are accounted for as purchases and sales. The fund will segregate cash, cash equivalents or other appropriate liquid securities on its records in amounts sufficient to meet the purchase price.

Repurchase Agreements — The fund may enter into repurchase agreements with institutions that ACIM has determined are creditworthy pursuant to criteria adopted by the Board of Trustees. The fund requires that the collateral, represented by securities, received in a repurchase transaction be transferred to the custodian in a manner sufficient to enable the fund to obtain those securities in the event of a default under the repurchase agreement. ACIM monitors, on a daily basis, the securities transferred to ensure the value, including accrued interest, of the securities under each repurchase agreement is equal to or greater than amounts owed to the fund under each repurchase agreement.

Joint Trading Account — Pursuant to an Exemptive Order issued by the Securities and Exchange Commission, the fund, along with certain other funds in the American Century Investments family of funds, may transfer uninvested cash balances into a joint trading account. These balances are invested in one or more repurchase agreements that are collateralized by U.S. Treasury or Agency obligations.

Segregated Assets — In accordance with the 1940 Act, the fund segregates assets on its books and records to cover certain types of investment securities and other financial instruments. ACIM monitors, on a daily basis, the securities segregated to ensure the fund designates a sufficient amount of liquid assets, marked-to-market daily. The fund may also receive assets or be required to pledge assets at the custodian bank or with a broker for collateral requirements.

Income Tax Status — It is the fund’s policy to distribute substantially all net investment income and net realized gains to shareholders and to otherwise qualify as a regulated investment company under provisions of the Internal Revenue Code. Accordingly, no provision has been made for income taxes. The fund files U.S. federal, state, local and non-U.S. tax returns as applicable. The fund's tax returns are subject to examination by the relevant taxing authority until expiration of the applicable statute of limitations, which is generally three years from the date of filing but can be longer in certain jurisdictions. At this time, management believes there are no uncertain tax positions which, based on their technical merit, would not be sustained upon examination and for which it is reasonably possible that the total amounts of unrecognized tax benefits will significantly change in the next twelve months.

Multiple Class — All shares of the fund represent an equal pro rata interest in the net assets of the class to which such shares belong, and have identical voting, dividend, liquidation and other rights and the same terms and conditions, except for class specific expenses and exclusive rights to vote on matters affecting only individual classes. Income, non-class specific expenses, and realized and unrealized capital gains and losses of the fund are allocated to each class of shares based on their relative net assets.

Distributions to Shareholders — Distributions from net investment income, if any, are declared daily and paid monthly. Distributions from net realized gains, if any, are generally declared and paid annually.

Indemnifications — Under the trust’s organizational documents, its officers and trustees are indemnified against certain liabilities arising out of the performance of their duties to the fund. In addition, in the normal course of business, the fund enters into contracts that provide general indemnifications. The maximum exposure under these arrangements is unknown as this would involve future claims that may be made against a fund. The risk of material loss from such claims is considered by management to be remote.

3. Fees and Transactions with Related Parties

Certain officers and trustees of the trust are also officers and/or directors of American Century Companies, Inc. (ACC). The trust's investment advisor, ACIM, the trust's distributor, American Century Investment Services, Inc. (ACIS), and the trust's transfer agent, American Century Services, LLC, are wholly owned, directly or indirectly, by ACC.

13


Management Fees — The trust has entered into a management agreement with ACIM, under which ACIM provides the fund with investment advisory and management services in exchange for a single, unified management fee (the fee) per class. The agreement provides that ACIM will pay all expenses of managing and operating the fund, except brokerage expenses, taxes, interest, fees and expenses of the independent trustees (including legal counsel fees), extraordinary expenses, and expenses incurred in connection with the provision of shareholder services and distribution services under a plan adopted pursuant to Rule 12b-1 under the 1940 Act. The fee is computed and accrued daily based on each class’s daily net assets and paid monthly in arrears. The difference in the fee among the classes is a result of their separate arrangements for non-Rule 12b-1 shareholder services. It is not the result of any difference in advisory or custodial fees or other expenses related to the management of the fund’s assets, which do not vary by class. The fee consists of (1) an Investment Category Fee based on the daily net assets of the fund and certain other accounts managed by the investment advisor that are in the same broad investment category as the fund and (2) a Complex Fee based on the assets of all funds in the American Century Investments family of funds that have the same investment advisor and distributor as the fund. For purposes of determining the Investment Category Fee and Complex Fee, the assets of funds managed by the investment advisor that invest exclusively in the shares of other funds (funds of funds) are not included.

The Investment Category Fee range, the Complex Fee range and the effective annual management fee for each class for the period ended September 30, 2022 are as follows:
Investment Category Fee Range
Complex
Fee Range
Effective Annual
Management Fee
Investor Class0.2425%
to 0.3600%
0.2500% to 0.3100%0.54%
I Class0.1500% to 0.2100%0.44%
A Class0.2500% to 0.3100%0.54%
C Class0.2500% to 0.3100%0.54%
R Class0.2500% to 0.3100%0.54%
R5 Class0.0500% to 0.1100%0.34%

Distribution and Service Fees — The Board of Trustees has adopted a separate Master Distribution and Individual Shareholder Services Plan for each of the A Class, C Class and R Class (collectively the plans), pursuant to Rule 12b-1 of the 1940 Act. The plans provide that the A Class will pay ACIS an annual distribution and service fee of 0.25%. The plans provide that the C Class will pay ACIS an annual distribution and service fee of 1.00%, of which 0.25% is paid for individual shareholder services and 0.75% is paid for distribution services. The plans provide that the R Class will pay ACIS an annual distribution and service fee of 0.50%. The fees are computed and accrued daily based on each class’s daily net assets and paid monthly in arrears. The fees are used to pay financial intermediaries for distribution and individual shareholder services. Fees incurred under the plans during the period ended September 30, 2022 are detailed in the Statement of Operations.

Trustees’ Fees and Expenses — The Board of Trustees is responsible for overseeing the investment advisor’s management and operations of the fund. The trustees receive detailed information about the fund and its investment advisor regularly throughout the year, and meet at least quarterly with management of the investment advisor to review reports about fund operations. The fund’s officers do not receive compensation from the fund.

Interfund Transactions — The fund may enter into security transactions with other American Century Investments funds and other client accounts of the investment advisor, in accordance with the 1940 Act rules and procedures adopted by the Board of Trustees. The rules and procedures require, among other things, that these transactions be effected at the independent current market price of the security. There were no interfund transactions during the period.

4. Investment Transactions

Purchases and sales of investment securities, excluding short-term investments, for the period ended September 30, 2022 were $678,640,904 and $767,008,384, respectively, all of which are U.S. Treasury and Government Agency obligations.

14


5. Capital Share Transactions

Transactions in shares of the fund were as follows (unlimited number of shares authorized):
Six months ended
September 30, 2022
Year ended
March 31, 2022
SharesAmountSharesAmount
Investor Class
Sold1,031,226 $9,746,451 3,905,115 $40,717,898 
Issued in reinvestment of distributions530,798 4,970,528 880,431 9,125,974 
Redeemed(5,217,746)(49,162,983)(12,291,200)(127,961,608)
(3,655,722)(34,446,004)(7,505,654)(78,117,736)
I Class
Sold285,572 2,697,918 2,794,918 29,388,981 
Issued in reinvestment of distributions43,614 408,872 181,459 1,899,083 
Redeemed(1,083,050)(10,226,459)(24,237,984)(254,306,466)
(753,864)(7,119,669)(21,261,607)(223,018,402)
A Class
Sold97,758 931,859 212,206 2,202,724 
Issued in reinvestment of distributions12,819 120,153 23,063 239,085 
Redeemed(372,238)(3,522,763)(566,407)(5,856,073)
(261,661)(2,470,751)(331,138)(3,414,264)
C Class
Sold209 1,998 23,108 242,187 
Issued in reinvestment of distributions500 4,671 770 7,972 
Redeemed(5,843)(55,245)(55,554)(572,356)
(5,134)(48,576)(31,676)(322,197)
R Class
Sold187,887 1,782,518 514,397 5,331,973 
Issued in reinvestment of distributions12,619 118,094 18,297 189,463 
Redeemed(306,755)(2,897,626)(540,674)(5,588,800)
(106,249)(997,014)(7,980)(67,364)
R5 Class
Sold154,524 1,457,477 744,697 7,774,617 
Issued in reinvestment of distributions56,617 530,461 104,587 1,084,641 
Redeemed(784,136)(7,408,148)(2,059,787)(21,450,011)
(572,995)(5,420,210)(1,210,503)(12,590,753)
Net increase (decrease)(5,355,625)$(50,502,224)(30,348,558)$(317,530,716)

6. Fair Value Measurements

The fund’s investments valuation process is based on several considerations and may use multiple inputs to determine the fair value of the investments held by the fund. In conformity with accounting principles generally accepted in the United States of America, the inputs used to determine a valuation are classified into three broad levels.

Level 1 valuation inputs consist of unadjusted quoted prices in an active market for identical investments.

Level 2 valuation inputs consist of direct or indirect observable market data (including quoted prices for comparable investments, evaluations of subsequent market events, interest rates, prepayment speeds, credit risk, etc.). These inputs also consist of quoted prices for identical investments initially expressed in local currencies that are adjusted through translation into U.S. dollars.

Level 3 valuation inputs consist of unobservable data (including a fund’s own assumptions).

15


The level classification is based on the lowest level input that is significant to the fair valuation measurement. The valuation inputs are not necessarily an indication of the risks associated with investing in these securities or other financial instruments.

The following is a summary of the level classifications as of period end. The Schedule of Investments provides additional information on the fund’s portfolio holdings.
Level 1Level 2Level 3
Assets
Investment Securities
U.S. Government Agency Mortgage-Backed Securities— $494,473,651 — 
U.S. Government Agency Collateralized Mortgage Obligations— 14,210,712 — 
Short-Term Investments$5,616 3,192,575 — 
$5,616 $511,876,938 — 
Other Financial Instruments
Futures Contracts$734,492 — — 
Liabilities
Other Financial Instruments
Futures Contracts$1,812,329 — — 

7. Derivative Instruments

Interest Rate Risk — The fund is subject to interest rate risk in the normal course of pursuing its investment objectives. The value of bonds generally declines as interest rates rise. A fund may enter into futures contracts based on a bond index or a specific underlying security. A fund may purchase futures contracts to gain exposure to increases in market value or sell futures contracts to protect against a decline in market value. Upon entering into a futures contract, a fund will segregate cash, cash equivalents or other appropriate liquid securities on its records in amounts sufficient to meet requirements. Subsequent payments (variation margin) are made or received daily, in cash, by a fund. The variation margin is equal to the daily change in the contract value and is recorded as unrealized gains and losses. A fund recognizes a realized gain or loss when the futures contract is closed or expires. Net realized and unrealized gains or losses occurring during the holding period of futures contracts are a component of net realized gain (loss) on futures contract transactions and change in net unrealized appreciation (depreciation) on futures contracts, respectively. One of the risks of entering into futures contracts is the possibility that the change in value of the contract may not correlate with the changes in value of the underlying securities. The fund's average notional exposure to interest rate risk derivative instruments held during the period was $20,797,365 futures contracts purchased and $24,156,451 futures contracts sold.

The value of interest rate risk derivative instruments as of September 30, 2022, is disclosed on the Statement of Assets and Liabilities as a liability of $135,145 in payable for variation margin on futures contracts.* For the six months ended September 30, 2022, the effect of interest rate risk derivative instruments on the Statement of Operations was $(1,387,153) in net realized gain (loss) on futures contract transactions and $(841,668) in change in net unrealized appreciation (depreciation) on futures contracts.

*Included in the unrealized appreciation (depreciation) on futures contracts as reported in the Schedule of Investments.

8. Risk Factors

The value of the fund’s shares will go up and down, sometimes rapidly or unpredictably, based on the performance of the securities owned by the fund and other factors generally affecting the securities market. Market risks, including political, regulatory, economic and social developments, can affect the value of the fund’s investments. Natural disasters, public health emergencies, war, terrorism and other unforeseeable events may lead to increased market volatility and may have adverse long-term effects on world economies and markets generally.

16


The fund may invest in instruments that have variable or floating coupon rates based on the London Interbank Offered Rate (LIBOR). LIBOR is a benchmark interest rate intended to be representative of the rate at which certain major international banks lend to one another over short-terms. Financial institutions have started the process of phasing out LIBOR and the transition process to a replacement rate may lead to increased volatility or illiquidity in markets for instruments that rely on LIBOR. This could result in a change to the value of such instruments or a change in the cost of temporary borrowing for the fund.

The fund’s investment process may result in high portfolio turnover, which could mean high transaction costs, affecting both performance and capital gains tax liabilities to investors.

9. Federal Tax Information

The book-basis character of distributions made during the year from net investment income or net realized gains may differ from their ultimate characterization for federal income tax purposes. These differences reflect the differing character of certain income items and net realized gains and losses for financial statement and tax purposes, and may result in reclassification among certain capital accounts on the financial statements.

As of period end, the components of investments for federal income tax purposes were as follows:
Federal tax cost of investments$573,762,859 
Gross tax appreciation of investments$763,212 
Gross tax depreciation of investments(62,643,517)
Net tax appreciation (depreciation) of investments$(61,880,305)

The difference between book-basis and tax-basis unrealized appreciation (depreciation) is attributable primarily to the tax deferral of losses on wash sales.

As of March 31, 2022, the fund had accumulated short-term capital losses of $(9,395,969) and accumulated long-term capital losses of $(58,714,839), which represent net capital loss carryovers that may be used to offset future realized capital gains for federal income tax purposes. The capital loss carryovers may be carried forward for an unlimited period. Future capital loss carryover utilization in any given year may be subject to Internal Revenue Code limitations.

17


Financial Highlights
For a Share Outstanding Throughout the Years Ended March 31 (except as noted)
Per-Share DataRatios and Supplemental Data
Income From Investment Operations:Ratio to Average Net Assets of:
Net Asset
Value,
Beginning
of Period
Net
Investment
Income
(Loss)(1)
Net
Realized and Unrealized
Gain (Loss)
Total From Investment OperationsDistributions
From Net
Investment
Income
Net Asset
Value, End
of Period
Total
Return(2)
Operating
Expenses
Net
Investment
Income
(Loss)
Portfolio
Turnover
Rate
Net Assets,
End of Period
(in thousands)
Investor Class
2022(3)
$9.840.09(0.97)(0.88)(0.11)$8.85(8.99)%
0.55%(4)
1.80%(4)
114%$409,036 
2022$10.590.08(0.65)(0.57)(0.18)$9.84(5.41)%0.54%0.77%288%$490,899 
2021$10.750.08(0.03)0.05(0.21)$10.590.49%0.55%0.75%308%$607,507 
2020$10.340.210.480.69(0.28)$10.756.73%0.55%1.97%270%$888,369 
2019$10.240.220.160.38(0.28)$10.343.78%0.55%2.18%297%$658,034 
2018$10.510.17(0.19)(0.02)(0.25)$10.24(0.24)%0.55%1.64%300%$782,698 
I Class
2022(3)
$9.850.09(0.97)(0.88)(0.12)$8.85(8.93)%
0.45%(4)
1.90%(4)
114%$27,915 
2022$10.590.09(0.63)(0.54)(0.20)$9.85(5.22)%0.44%0.87%288%$38,469 
2021$10.760.09(0.04)0.05(0.22)$10.590.50%0.45%0.85%308%$266,543 
2020$10.340.220.490.71(0.29)$10.766.83%0.45%2.07%270%$62,648 
2019$10.250.230.150.38(0.29)$10.343.88%0.45%2.28%297%$38,809 
2018(5)
$10.520.19(0.21)(0.02)(0.25)$10.25(0.21)%
0.45%(4)
1.88%(4)
300%(6)
$25,599 



For a Share Outstanding Throughout the Years Ended March 31 (except as noted)
Per-Share DataRatios and Supplemental Data
Income From Investment Operations:Ratio to Average Net Assets of:
Net Asset
Value,
Beginning
of Period
Net
Investment
Income
(Loss)(1)
Net
Realized and Unrealized
Gain (Loss)
Total From Investment OperationsDistributions
From Net
Investment
Income
Net Asset
Value, End
of Period
Total
Return(2)
Operating
Expenses
Net
Investment
Income
(Loss)
Portfolio
Turnover
Rate
Net Assets,
End of Period
(in thousands)
A Class
2022(3)
$9.840.07(0.96)(0.89)(0.10)$8.85(9.10)%
0.80%(4)
1.55%(4)
114%$10,018 
2022$10.590.05(0.64)(0.59)(0.16)$9.84(5.65)%0.79%0.52%288%$13,717 
2021$10.760.05(0.03)0.02(0.19)$10.590.15%0.80%0.50%308%$18,262 
2020$10.340.190.480.67(0.25)$10.766.56%0.80%1.72%270%$16,844 
2019$10.240.200.150.35(0.25)$10.343.52%0.80%1.93%297%$28,153 
2018$10.510.14(0.19)(0.05)(0.22)$10.24(0.49)%0.80%1.39%300%$30,654 
C Class
2022(3)
$9.840.04(0.97)(0.93)(0.06)$8.85(9.44)%
1.55%(4)
0.80%(4)
114%$628 
2022$10.59(0.02)(0.65)(0.67)(0.08)$9.84(6.35)%1.54%(0.23)%288%$749 
2021$10.76(0.02)(0.04)(0.06)(0.11)$10.59(0.60)%1.55%(0.25)%308%$1,141 
2020$10.340.110.480.59(0.17)$10.765.76%1.55%0.97%270%$3,526 
2019$10.240.120.160.28(0.18)$10.342.75%1.55%1.18%297%$4,663 
2018$10.510.07(0.20)(0.13)(0.14)$10.24(1.24)%1.55%0.64%300%$7,439 
R Class
2022(3)
$9.840.06(0.96)(0.90)(0.09)$8.85(9.22)%
1.05%(4)
1.30%(4)
114%$10,985 
2022$10.580.03(0.64)(0.61)(0.13)$9.84(5.79)%1.04%0.27%288%$13,262 
2021$10.750.03(0.04)(0.01)(0.16)$10.58(0.11)%1.05%0.25%308%$14,350 
2020$10.330.160.480.64(0.22)$10.756.19%1.05%1.47%270%$12,465 
2019$10.240.170.150.32(0.23)$10.333.26%1.05%1.68%297%$9,353 
2018$10.510.12(0.20)(0.08)(0.19)$10.24(0.74)%1.05%1.14%300%$8,619 



For a Share Outstanding Throughout the Years Ended March 31 (except as noted)
Per-Share DataRatios and Supplemental Data
Income From Investment Operations:Ratio to Average Net Assets of:
Net Asset
Value,
Beginning
of Period
Net
Investment
Income
(Loss)(1)
Net
Realized and Unrealized
Gain (Loss)
Total From Investment OperationsDistributions
From Net
Investment
Income
Net Asset
Value, End
of Period
Total
Return(2)
Operating
Expenses
Net
Investment
Income
(Loss)
Portfolio
Turnover
Rate
Net Assets,
End of Period
(in thousands)
R5 Class
2022(3)
$9.840.09(0.96)(0.87)(0.12)$8.85(8.89)%
0.35%(4)
2.00%(4)
114%$36,397 
2022$10.590.10(0.64)(0.54)(0.21)$9.84(5.22)%0.34%0.97%288%$46,121 
2021$10.750.10(0.03)0.07(0.23)$10.590.69%0.35%0.95%308%$62,423 
2020$10.340.230.480.71(0.30)$10.756.94%0.35%2.17%270%$92,693 
2019$10.240.240.160.40(0.30)$10.343.98%0.35%2.38%297%$81,710 
2018$10.510.19(0.19)(0.27)$10.24(0.04)%0.35%1.84%300%$95,331 

Notes to Financial Highlights
(1)Computed using average shares outstanding throughout the period.
(2)Total returns are calculated based on the net asset value of the last business day and do not reflect applicable sales charges, if any. Total returns for periods less than one year are not annualized.
(3)Six months ended September 30, 2022 (unaudited).
(4)Annualized.
(5)April 10, 2017 (commencement of sale) through March 31, 2018.
(6)Portfolio turnover is calculated at the fund level. Percentage indicated was calculated for the year ended March 31, 2018.


See Notes to Financial Statements.



Approval of Management Agreement

At a meeting held on June 21, 2022, the Fund’s Board of Trustees (the "Board") unanimously approved the renewal of the management agreement pursuant to which American Century Investment Management, Inc. (the “Advisor”) acts as the investment advisor for the Fund. Under Section 15(c) of the Investment Company Act of 1940 (the “Investment Company Act”), contracts for investment advisory services are required to be reviewed, evaluated, and approved by a majority of a fund’s Trustees, including a majority of the independent Trustees, each year. The Board regards this annual evaluation and renewal as one of its most important responsibilities.

The independent Trustees have memorialized a statement regarding the relationship between their ongoing obligations to oversee and evaluate the performance of the Advisor and their annual consideration of renewal of the management agreement. In that statement, the independent Trustees noted that their assessment of the Advisor’s performance is an ongoing process that takes place over the entire year and is informed by all of the extensive information that the Board and its committees receive and consider over time. This information, together with the additional materials provided specifically in connection with the review, are central to the Board’s assessment of the Advisor’s performance and its determination whether to renew the Fund’s management agreement.

Prior to its consideration of the renewal of the management agreement, the Board requested and reviewed data and analysis relating to the proposed renewal. This information and analysis was compiled by the Advisor and certain independent providers of evaluation data concerning the Fund.

In connection with its consideration of the renewal of the management agreement, the Board’s review and evaluation of the services provided by the Advisor and its affiliates included, but was not limited to, the following:

the nature, extent, and quality of investment management, shareholder services, and other services provided and to be provided to the Fund including without limitation portfolio management and trading services, shareholder and intermediary service levels and quality, compliance and legal services, fund accounting and financial reporting, and fund share distribution;
the wide range of other programs and services provided by the Advisor and its affiliates to the Fund and its shareholders on a routine and non-routine basis;
the Fund’s investment performance, including data comparing the Fund’s performance to appropriate benchmarks and/or a peer group of other mutual funds with similar investment objectives and strategies;
the cost of owning the Fund compared to the cost of owning similarly-managed funds;
the compliance policies, procedures, and regulatory experience of the Advisor and its affiliates and certain other Fund service providers;
financial data showing the cost of services provided by the Advisor and its affiliates to the Fund, the profitability of the Fund to the Advisor, and the overall profitability of the Advisor;
the Advisor’s strategic plans, generally, and with respect to the ongoing impact of the COVID-19 pandemic response, heightened areas of interest in the mutual fund industry and recent geopolitical issues;
the Advisor’s business continuity plans, vendor management practices, and cyber security practices;
any economies of scale associated with the Advisor’s management of the Fund;
services provided and charges to the Advisor’s other investment management clients;
fees and expenses associated with any investment by the Fund in other funds;
payments and practices in connection with financial intermediaries holding shares of the Fund on behalf of their clients and the services provided by intermediaries in connection therewith; and
any collateral benefits derived by the Advisor from the management of the Fund.
21


In keeping with its practice, the Board held two meetings and the independent Trustees met in private session to discuss the renewal and to review and discuss the information provided in response to their request. The Board held active discussions with the Advisor regarding the renewal of the management agreement. The independent Trustees had the benefit of the advice of their independent counsel throughout the process.

Factors Considered

The Trustees considered all of the information provided by the Advisor, the independent data providers, and the independent Trustees’ independent counsel in connection with the approval. They determined that the information was sufficient for them to evaluate the management agreement for the Fund. In connection with their review, the Trustees did not identify any single factor as being all-important or controlling and each Trustee may have attributed different levels of importance to different factors. In deciding to renew the management agreement, the Board based its decision on a number of factors, including the following:

Nature, Extent and Quality of Services — Generally. Under the management agreement, the Advisor is responsible for providing or arranging for all services necessary for the operation of the Fund. The Board noted that the Advisor provides or arranges at its own expense a wide variety of services including:

constructing and designing the Fund
portfolio research and security selection
initial capitalization/funding
securities trading
Fund administration
custody of Fund assets
daily valuation of the Fund’s portfolio
shareholder servicing and transfer agency, including shareholder confirmations, recordkeeping, and communications
legal services (except the independent Trustees’ counsel)
regulatory and portfolio compliance
financial reporting
marketing and distribution (except amounts paid by the Fund under Rule 12b-1 plans)

The Board noted that many of these services have expanded over time in terms of both quantity and complexity in response to shareholder demands, competition in the industry, changing distribution channels, and the changing regulatory environment.

Investment Management Services. The nature of the investment management services provided to the Fund is quite complex and allows Fund shareholders access to professional money management, instant diversification of their investments within an asset class, the opportunity to easily diversify among asset classes by investing in or exchanging among various American Century Investments funds, and liquidity. In evaluating investment performance, the Board expects the Advisor to manage the Fund in accordance with its investment objectives and principal investment strategies. Further, the Trustees recognize that the Advisor has an obligation to seek the best execution of fund trades. In providing these services, the Advisor utilizes teams of investment professionals (portfolio managers, analysts, research assistants, and securities traders) who require extensive information technology, research, training, compliance, and other systems to conduct their business. The Board, directly and through its Portfolio Committee, regularly reviews investment performance information for the Fund, together with comparative information for appropriate benchmarks and/or peer groups of similarly-managed funds, over different time horizons. The Trustees also review investment performance information during the management agreement renewal process. If performance concerns are identified, the Fund receives special reviews until performance improves, during which the Board discusses with the Advisor the reasons for such results (e.g., market conditions, security selection) and any actions being taken to improve performance. The Fund’s performance was above its benchmark for the one-, three-, five-, and ten-year periods reviewed by the Board. The Board found the investment management
22


services provided by the Advisor to the Fund to be satisfactory and consistent with the management agreement.

Shareholder and Other Services. Under the management agreement, the Advisor, either directly or through affiliates or third parties, provides the Fund with a comprehensive package of transfer agency, shareholder, and other services. The Board, directly and through its various committees, regularly reviews reports and evaluations of such services at its regular meetings. These reports include, but are not limited to, information regarding the operational efficiency and accuracy of the shareholder and transfer agency services provided, staffing levels, shareholder satisfaction, technology support (including cyber security), new products and services offered to Fund shareholders, securities trading activities, portfolio valuation services, auditing services, and legal and operational compliance activities. The Board found the services provided by the Advisor to the Fund under the management agreement to be competitive and of high quality.

Costs of Services and Profitability. The Advisor provides detailed information concerning its cost of providing various services to the Fund, its profitability in managing the Fund, its overall profitability, and its financial condition. The Trustees have reviewed with the Advisor the methodology used to prepare this financial information. This information is considered in evaluating the Advisor’s financial condition, its ability to continue to provide services under the management agreement, and the reasonableness of the current management fee. The Board concluded that the Advisor’s profits were reasonable in light of the services provided to the Fund.

Ethics. The Board generally considers the Advisor’s commitment to providing quality services to shareholders and to conducting its business ethically. They noted that the Advisor’s practices generally meet or exceed industry best practices.

Economies of Scale. The Board also reviewed information provided by the Advisor regarding the possible existence of economies of scale in connection with the management of the Fund. The Board concluded that economies of scale are difficult to measure and predict with precision, especially on a fund-by-fund basis. The Board concluded that the Advisor is appropriately sharing economies of scale, to the extent they exist, through its fee structure and through reinvestment in its business, infrastructure, investment capabilities and initiatives to provide shareholders enhanced and expanded services.

Comparison to Other Funds’ Fees. The management agreement provides that the Fund pays the Advisor a single, all-inclusive (or unified) management fee for providing all services necessary for the management and operation of the Fund, other than securities transaction expenses, taxes, interest, extraordinary expenses, fees and expenses of the Fund’s independent Trustees (including their independent legal counsel), and expenses incurred in connection with the provision of shareholder services and distribution services under a plan adopted pursuant to Rule 12b-1 under the Investment Company Act. Under this unified fee structure, the Advisor is responsible for providing all investment advisory, custody, audit, administrative, compliance, recordkeeping, marketing, and shareholder services, or arranging and supervising third parties to provide such services. By contrast, most other funds are charged a variety of fees, including an investment advisory fee, a transfer agency fee, an administrative fee, and other expenses. Other than their investment advisory fees and any applicable Rule 12b-1 distribution fees, all other components of the total fees charged by these other funds may be increased without shareholder approval. The Board believes the unified fee structure is a benefit to Fund shareholders because it clearly discloses to shareholders the cost of owning Fund shares, and, since the unified fee cannot be increased without a vote of Fund shareholders, it shifts to the Advisor the risk of increased costs of operating the Fund and provides a direct incentive to minimize administrative inefficiencies. Part of the Board’s analysis of fee levels involves reviewing certain evaluative data compiled by an independent provider and comparing the Fund’s unified fee to the total expense ratio of peer funds. The unified fee charged to shareholders of the Fund was below the median of the total expense ratios of the Fund’s peer universe. The Board concluded that the management fee paid by the Fund to the Advisor under the management agreement is reasonable in light of the services provided to the Fund.
23


Comparison to Fees and Services Provided to Other Clients of the Advisor. The Board also requested and received information from the Advisor concerning the nature of the services, fees, costs, and profitability of its advisory services to advisory clients other than the Fund. They observed that these varying types of client accounts require different services and involve different regulatory and entrepreneurial risks than the management of the Fund. The Board analyzed this information and concluded that the fees charged and services provided to the Fund were reasonable by comparison.

Payments to Intermediaries. The Trustees also requested and received a description of payments made to intermediaries by the Fund and the Advisor and services provided by intermediaries. These payments include various payments made by the Fund or the Advisor to different types of intermediaries and recordkeepers for distribution and service activities provided with respect to the Fund. The Trustees reviewed such information and received representations from the Advisor that all such payments by the Fund were made pursuant to the Fund’s Rule 12b-1 Plan and that all such payments by the Advisor were made from the Advisor’s resources and reasonable profits.

Collateral or “Fall-Out” Benefits Derived by the Advisor. The Board considered the possible existence of collateral benefits the Advisor may receive as a result of its relationship with the Fund. The Board noted that the Advisor’s primary business is managing funds and it generally does not use fund or shareholder information to generate profits in other lines of business, and therefore does not derive any significant collateral benefits from them. The Board noted that the Advisor may receive proprietary research from broker-dealers that execute fund portfolio transactions. The Board also determined that the Advisor is able to provide investment management services to certain clients other than the Fund, at least in part, due to its existing infrastructure built to serve the fund complex. The Board also noted that the assets of those other accounts are, where applicable, included with the assets of the Fund to determine breakpoints in the management fee schedule.

Existing Relationship. The Board also considered whether there was any reason for not continuing the existing arrangement with the Advisor. In this regard, the Board was mindful of the potential disruptions of the Fund’s operations and various risks, uncertainties, and other effects that could occur as a result of a decision not to continue such relationship. In particular, the Board recognized that most shareholders have invested in the Fund on the strength of the Advisor’s industry standing and reputation and in the expectation that the Advisor will have a continuing role in providing advisory services to the Fund.

Conclusion of the Trustees. As a result of this process, the Board, including all of the independent Trustees, taking into account all of the factors discussed above and the information provided by the Advisor and others in connection with its review and throughout the year, concluded that the terms of the management agreement are fair and reasonable and that the management fee charged to the Fund is reasonable in light of the services provided and that the management agreement between the Fund and the Advisor should be renewed for an additional one-year period.


24


Additional Information

Retirement Account Information

As required by law, distributions you receive from certain retirement accounts are subject to federal income tax withholding, unless you elect not to have withholding apply*. Tax will be withheld on the total amount withdrawn even though you may be receiving amounts that are not subject to withholding, such as nondeductible contributions. In such case, excess amounts of withholding could occur. You may adjust your withholding election so that a greater or lesser amount will be withheld.

If you don’t want us to withhold on this amount, you must notify us to not withhold the federal income tax. You may notify us in writing or in certain situations by telephone or through other electronic means. For systematic withdrawals, your withholding election will remain in effect until revoked or changed by filing a new election. You have the right to revoke your election at any time and change your withholding percentage for future distributions.

Remember, even if you elect not to have income tax withheld, you are liable for paying income tax on the taxable portion of your withdrawal. If you elect not to have income tax withheld or you don’t have enough income tax withheld, you may be responsible for payment of estimated tax. You may incur penalties under the estimated tax rules if your withholding and estimated tax payments are not sufficient. You can reduce or defer the income tax on a distribution by directly or indirectly rolling such distribution over to another IRA or eligible plan. You should consult your tax advisor for additional information.

State tax will be withheld if, at the time of your distribution, your address is within one of the mandatory withholding states and you have federal income tax withheld (or as otherwise required by state law). State taxes will be withheld from your distribution in accordance with the respective state rules.

*Some 403(b), 457 and qualified retirement plan distributions may be subject to 20% mandatory withholding, as they are subject to special tax and withholding rules.  Your plan administrator or plan sponsor is required to provide you with a special tax notice explaining those rules at the time you request a distribution.  If applicable, federal and/or state taxes may be withheld from your distribution amount.


Proxy Voting Policies

Descriptions of the principles and policies that the fund's investment advisor uses in exercising the voting rights associated with the securities purchased and/or held by the fund are available without charge, upon request, by calling 1-800-345-2021 or visiting American Century Investments’ website at americancentury.com/proxy. A description of the policies is also available on the Securities and Exchange Commission’s website at sec.gov. Information regarding how the investment advisor voted proxies relating to portfolio securities during the most recent 12-month period ended June 30 is available on americancentury.com/proxy. It is also available at sec.gov.


Quarterly Portfolio Disclosure

The fund files its complete schedule of portfolio holdings with the Securities and Exchange Commission (SEC) for the first and third quarters of each fiscal year as an exhibit to its reports on Form N-PORT. These portfolio holdings are available on the fund's website at americancentury.com and, upon request, by calling 1-800-345-2021. The fund’s Form N-PORT reports are available on the SEC’s website at sec.gov.



25


Notes




26


Notes


27


Notes

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Contact Usamericancentury.com
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or 816-531-5575
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American Century Government Income Trust
Investment Advisor:
American Century Investment Management, Inc.
Kansas City, Missouri
This report and the statements it contains are submitted for the general information of our shareholders. The report is not authorized for distribution to prospective investors unless preceded or accompanied by an effective prospectus.
©2022 American Century Proprietary Holdings, Inc. All rights reserved.
CL-SAN-90809 2211





    


acihorizblkd45.jpg
Semiannual Report
September 30, 2022
Government Bond Fund
Investor Class (CPTNX)
I Class (ABHTX)
A Class (ABTAX)
C Class (ABTCX)
R Class (ABTRX)
R5 Class (ABTIX)














Table of Contents
President’s Letter
Fund Characteristics
Shareholder Fee Example
Schedule of Investments
Statement of Assets and Liabilities
Statement of Operations
Statement of Changes in Net Assets
Notes to Financial Statements
Financial Highlights
Approval of Management Agreement
Additional Information


























Any opinions expressed in this report reflect those of the author as of the date of the report, and do not necessarily represent the opinions of American Century Investments® or any other person in the American Century Investments organization. Any such opinions are subject to change at any time based upon market or other conditions and American Century Investments disclaims any responsibility to update such opinions. These opinions may not be relied upon as investment advice and, because investment decisions made by American Century Investments funds are based on numerous factors, may not be relied upon as an indication of trading intent on behalf of any American Century Investments fund. Security examples are used for representational purposes only and are not intended as recommendations to purchase or sell securities. Performance information for comparative indices and securities is provided to American Century Investments by third party vendors. To the best of American Century Investments’ knowledge, such information is accurate at the time of printing.



President’s Letter
image6.jpg Jonathan Thomas

Dear Investor:

Thank you for reviewing this semiannual report for the period ending September 30, 2022. It provides a market overview (below), followed by a schedule of fund investments and other financial information. For additional investment insights, please visit americancentury.com.

Inflation, Rates, Recession Worries Weighed on Financial Markets

The reporting period began with financial markets digesting the effects of soaring inflation, heightened market volatility and slowing growth. For more than a year, the effects of massive fiscal and monetary support, escalating energy prices, supply chain breakdowns and labor market shortages had driven inflation to multidecade highs. The Russia-Ukraine war continued to nudge commodity prices even higher, exacerbating existing inflationary pressures and further damaging global supply chains.

The Federal Reserve (Fed), which began tightening in March with a 25-basis-points (bps) hike, increased rates an additional 275 bps during the six-month period. Inflation was slow to respond, climbing to a 40-year-high 9.1% in June before slipping to 8.2% in September, largely due to falling gasoline prices. Policymakers indicated taming inflation remains their priority, even as the economy contracted in 2022’s first two quarters and an official recession appeared imminent.

In addition to fueling recession risk, the combination of elevated inflation and a hawkish Fed helped push Treasury yields sharply higher and stock prices significantly lower. Amid persistent market unrest, most stock and bond indices ended the six-month period with steep losses. Stocks, as measured by the S&P 500 Index, plunged more than 20%, while bonds, as measured by the Bloomberg U.S. Aggregate Bond Index, tumbled more than 9%.

Staying Disciplined in Uncertain Times

We expect market volatility to linger as investors navigate a complex environment of high inflation, rising interest rates and economic uncertainty. In addition, Russia’s invasion of Ukraine complicates an increasingly tense geopolitical backdrop and threatens global energy markets. We will continue to monitor this evolving situation and what it broadly means for investors across asset classes.

We appreciate your confidence in us during these extraordinary times. Our firm has a long history of helping clients weather unpredictable markets, and we’re confident we will continue to meet today’s challenges.

Sincerely,
image48a16.jpg
Jonathan Thomas
President and Chief Executive Officer
American Century Investments
2


Fund Characteristics 
SEPTEMBER 30, 2022
Types of Investments in Portfolio% of net assets
U.S. Treasury Securities43.1%
U.S. Government Agency Mortgage-Backed Securities34.1%
Collateralized Mortgage Obligations9.8%
Asset-Backed Securities5.4%
U.S. Government Agency Securities2.5%
Municipal Securities0.4%
Short-Term Investments5.8%
Other Assets and Liabilities(1.1)%
3


Shareholder Fee Example 

Fund shareholders may incur two types of costs: (1) transaction costs, including sales charges (loads) on purchase payments and redemption/exchange fees; and (2) ongoing costs, including management fees; distribution and service (12b-1) fees; and other fund expenses. This example is intended to help you understand your ongoing costs (in dollars) of investing in your fund and to compare these costs with the ongoing cost of investing in other mutual funds.

The example is based on an investment of $1,000 made at the beginning of the period and held for the entire period from April 1, 2022 to September 30, 2022.

Actual Expenses

The table provides information about actual account values and actual expenses for each class. You may use the information, together with the amount you invested, to estimate the expenses that you paid over the period. First, identify the share class you own. Then simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number under the heading “Expenses Paid During Period” to estimate the expenses you paid on your account during this period.

If you hold Investor Class shares of any American Century Investments mutual fund, or I Class shares of the American Century Diversified Bond Fund, in an American Century Investments account (i.e., not through a financial intermediary or employer-sponsored retirement plan account), American Century Investments may charge you a $25 annual account maintenance fee if the value of those shares is less than $10,000. We will redeem shares automatically in one of your accounts to pay the $25 fee. In determining your total eligible investment amount, we will include your investments in all personal accounts (including American Century Investments brokerage accounts) registered under your Social Security number. Personal accounts include individual accounts, joint accounts, UGMA/UTMA accounts, personal trusts, Coverdell Education Savings Accounts and IRAs (including traditional, Roth, Rollover, SEP-, SARSEP- and SIMPLE-IRAs), and certain other retirement accounts. If you have only business, business retirement, employer-sponsored or American Century Investments brokerage accounts, you are currently not subject to this fee. If you are subject to the account maintenance fee, your account value could be reduced by the fee amount.

Hypothetical Example for Comparison Purposes

The table also provides information about hypothetical account values and hypothetical expenses based on the actual expense ratio of each class of your fund and an assumed rate of return of 5% per year before expenses, which is not the actual return of a fund’s share class. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in your fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds.

Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transactional costs, such as sales charges (loads) or redemption/exchange fees. Therefore, the table is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. In addition, if these transactional costs were included, your costs would have been higher.

4


Beginning
Account Value
4/1/22
Ending
Account Value
9/30/22
Expenses Paid
During Period(1)
4/1/22 - 9/30/22
Annualized
Expense Ratio(1)
Actual
Investor Class$1,000$913.10$2.250.47%
I Class$1,000$913.50$1.770.37%
A Class$1,000$911.90$3.450.72%
C Class$1,000$909.40$7.041.47%
R Class$1,000$911.60$4.650.97%
R5 Class$1,000$914.00$1.300.27%
Hypothetical
Investor Class$1,000$1,022.71$2.380.47%
I Class$1,000$1,023.21$1.880.37%
A Class$1,000$1,021.46$3.650.72%
C Class$1,000$1,017.70$7.441.47%
R Class$1,000$1,020.21$4.910.97%
R5 Class$1,000$1,023.72$1.370.27%
(1)Expenses are equal to the class's annualized expense ratio listed in the table above, multiplied by the average account value over the period, multiplied by 183, the number of days in the most recent fiscal half-year, divided by 365, to reflect the one-half year period. Annualized expense ratio reflects actual expenses, including any applicable fee waivers or expense reimbursements and excluding any acquired fund fees and expenses.
5


Schedule of Investments

SEPTEMBER 30, 2022 (UNAUDITED)
Principal Amount/SharesValue
U.S. TREASURY SECURITIES — 43.1%


U.S. Treasury Bonds, 3.50%, 2/15/39$2,000,000 $1,906,250 
U.S. Treasury Bonds, 3.75%, 8/15/414,500,000 4,316,660 
U.S. Treasury Bonds, 2.00%, 11/15/413,800,000 2,722,121 
U.S. Treasury Bonds, 3.125%, 11/15/411,800,000 1,566,844 
U.S. Treasury Bonds, 3.125%, 2/15/422,500,000 2,179,199 
U.S. Treasury Bonds, 3.00%, 5/15/428,000,000 6,812,188 
U.S. Treasury Bonds, 3.25%, 5/15/427,000,000 6,214,687 
U.S. Treasury Bonds, 3.375%, 8/15/428,000,000 7,248,750 
U.S. Treasury Bonds, 2.75%, 11/15/423,100,000 2,514,148 
U.S. Treasury Bonds, 2.875%, 5/15/433,500,000 2,887,773 
U.S. Treasury Bonds, 3.625%, 8/15/431,000,000 933,359 
U.S. Treasury Bonds, 3.75%, 11/15/431,500,000 1,426,055 
U.S. Treasury Bonds, 3.125%, 8/15/442,000,000 1,711,016 
U.S. Treasury Bonds, 3.00%, 11/15/443,500,000 2,926,875 
U.S. Treasury Bonds, 2.875%, 8/15/452,000,000 1,633,672 
U.S. Treasury Bonds, 2.50%, 2/15/46500,000 380,039 
U.S. Treasury Bonds, 3.375%, 11/15/485,500,000 5,011,016 
U.S. Treasury Bonds, 2.875%, 5/15/492,000,000 1,668,477 
U.S. Treasury Bonds, 2.25%, 8/15/494,500,000 3,293,438 
U.S. Treasury Bonds, 2.375%, 11/15/496,500,000 4,898,359 
U.S. Treasury Bonds, 1.875%, 2/15/51500,000 331,211 
U.S. Treasury Bonds, 2.375%, 5/15/512,400,000 1,796,625 
U.S. Treasury Bonds, 1.875%, 11/15/51486,000 321,614 
U.S. Treasury Bonds, 2.875%, 5/15/5211,000,000 9,227,969 
U.S. Treasury Bonds, 3.00%, 8/15/523,000,000 2,589,844 
U.S. Treasury Notes, 1.50%, 9/30/245,000,000 4,740,918 
U.S. Treasury Notes, 1.75%, 3/15/256,000,000 5,650,781 
U.S. Treasury Notes, 2.75%, 6/30/258,000,000 7,690,938 
U.S. Treasury Notes, 3.50%, 9/15/255,000,000 4,898,438 
U.S. Treasury Notes, 3.00%, 9/30/255,000,000 4,826,758 
U.S. Treasury Notes, 1.875%, 2/28/27(1)
19,000,000 17,307,812 
U.S. Treasury Notes, 2.625%, 5/31/2750,000,000 46,947,265 
U.S. Treasury Notes, 3.25%, 6/30/2715,000,000 14,459,180 
U.S. Treasury Notes, 2.75%, 7/31/273,000,000 2,825,391 
U.S. Treasury Notes, 2.875%, 4/30/2932,000,000 29,880,000 
U.S. Treasury Notes, 3.25%, 6/30/2921,000,000 20,075,918 
U.S. Treasury Notes, 3.125%, 8/31/294,500,000 4,271,836 
U.S. Treasury Notes, 1.875%, 2/15/322,000,000 1,695,156 
U.S. Treasury Notes, 2.875%, 5/15/3237,000,000 34,216,328 
U.S. Treasury Notes, VRN, 3.33%, (3-month USBMMY plus 0.03%), 7/31/2310,000,000 10,011,648 
U.S. Treasury Notes, VRN, 3.33%, (3-month USBMMY plus 0.04%), 10/31/235,000,000 5,005,291 
TOTAL U.S. TREASURY SECURITIES
(Cost $311,239,073)
291,021,847 
U.S. GOVERNMENT AGENCY MORTGAGE-BACKED SECURITIES — 34.1%
Adjustable-Rate U.S. Government Agency Mortgage-Backed Securities — 1.1%
FHLMC, VRN, 2.94%, (1-year H15T1Y plus 2.25%), 9/1/35212,630 217,255 
6


Principal Amount/SharesValue
FHLMC, VRN, 3.09%, (12-month LIBOR plus 1.87%), 7/1/36$166,883 $169,604 
FHLMC, VRN, 3.20%, (1-year H15T1Y plus 2.14%), 10/1/36354,245 363,902 
FHLMC, VRN, 3.01%, (1-year H15T1Y plus 2.26%), 4/1/37179,896 183,575 
FHLMC, VRN, 1.90%, (12-month LIBOR plus 1.65%), 12/1/42201,827 201,770 
FHLMC, VRN, 2.52%, (12-month LIBOR plus 1.62%), 11/1/431,232,672 1,239,427 
FHLMC, VRN, 2.91%, (12-month LIBOR plus 1.63%), 1/1/44542,861 541,135 
FHLMC, VRN, 3.54%, (12-month LIBOR plus 1.60%), 6/1/45246,029 248,134 
FHLMC, VRN, 2.65%, (12-month LIBOR plus 1.62%), 9/1/45716,923 718,932 
FNMA, VRN, 3.18%, (6-month LIBOR plus 1.57%), 6/1/35163,570 167,353 
FNMA, VRN, 3.21%, (6-month LIBOR plus 1.57%), 6/1/35279,825 286,298 
FNMA, VRN, 3.25%, (6-month LIBOR plus 1.57%), 6/1/35214,500 219,479 
FNMA, VRN, 3.29%, (6-month LIBOR plus 1.57%), 6/1/35133,016 136,124 
FNMA, VRN, 3.00%, (6-month LIBOR plus 1.54%), 9/1/35227,263 232,152 
FNMA, VRN, 2.71%, (12-month LIBOR plus 1.61%), 4/1/46384,061 392,774 
FNMA, VRN, 3.18%, (12-month LIBOR plus 1.61%), 3/1/47257,174 246,419 
FNMA, VRN, 3.11%, (12-month LIBOR plus 1.61%), 4/1/47345,830 331,895 
GNMA, VRN, 1.75%, (1-year H15T1Y plus 1.50%), 11/20/3257,789 55,553 
GNMA, VRN, 2.25%, (1-year H15T1Y plus 2.00%), 10/20/34200,902 193,447 
GNMA, VRN, 1.75%, (1-year H15T1Y plus 1.50%), 12/20/3489,934 86,371 
GNMA, VRN, 2.625%, (1-year H15T1Y plus 1.50%), 3/20/35112,898 110,851 
GNMA, VRN, 1.625%, (1-year H15T1Y plus 1.50%), 7/20/35241,337 237,707 
GNMA, VRN, 2.625%, (1-year H15T1Y plus 1.50%), 3/20/36399,441 397,909 
GNMA, VRN, 1.75%, (1-year H15T1Y plus 1.50%), 11/20/36165,230 160,014 
7,138,080 
Fixed-Rate U.S. Government Agency Mortgage-Backed Securities — 33.0%
FHLMC, 5.50%, 4/1/38785,070 812,594 
FHLMC, 2.50%, 3/1/425,861,083 5,021,972 
FHLMC, 3.00%, 2/1/433,142,321 2,818,222 
FHLMC, 3.00%, 1/1/503,889,128 3,415,470 
FHLMC, 3.50%, 5/1/501,231,167 1,119,719 
FHLMC, 2.50%, 10/1/502,899,572 2,452,548 
FHLMC, 2.50%, 5/1/519,938,726 8,430,120 
FHLMC, 3.50%, 5/1/517,753,110 7,062,896 
FHLMC, 3.00%, 7/1/515,882,867 5,204,471 
FHLMC, 2.00%, 8/1/516,681,014 5,439,141 
FHLMC, 4.00%, 8/1/513,076,120 2,887,680 
FHLMC, 2.50%, 10/1/511,717,798 1,453,694 
FHLMC, 2.50%, 1/1/522,986,558 2,516,790 
FHLMC, 3.50%, 5/1/525,321,720 4,802,199 
FHLMC, 3.50%, 5/1/522,079,912 1,875,646 
FHLMC, 4.00%, 5/1/524,127,705 3,835,369 
FHLMC, 4.00%, 5/1/523,630,894 3,377,575 
FNMA, 6.00%, 12/1/33569,360 598,759 
FNMA, 3.50%, 3/1/34445,131 422,016 
FNMA, 5.50%, 8/1/34826,508 852,291 
FNMA, 5.50%, 1/1/36899,891 930,373 
FNMA, 2.00%, 6/1/3612,369,671 10,927,920 
FNMA, 6.00%, 9/1/37225,178 237,204 
FNMA, 6.00%, 11/1/371,016,621 1,072,159 
FNMA, 4.50%, 4/1/39251,214 246,583 
FNMA, 4.50%, 5/1/39713,023 700,018 
7


Principal Amount/SharesValue
FNMA, 6.50%, 5/1/39$516,416 $539,660 
FNMA, 4.50%, 10/1/391,232,978 1,209,087 
FNMA, 4.50%, 6/1/411,094,205 1,073,025 
FNMA, 4.00%, 8/1/41948,496 904,956 
FNMA, 4.50%, 9/1/41583,378 570,559 
FNMA, 3.50%, 10/1/41889,610 819,863 
FNMA, 4.00%, 12/1/412,590,756 2,471,972 
FNMA, 2.50%, 3/1/425,449,468 4,672,665 
FNMA, 3.50%, 5/1/42996,291 916,540 
FNMA, 2.50%, 6/1/424,593,959 3,936,940 
FNMA, 3.50%, 6/1/42953,298 876,493 
FNMA, 3.50%, 9/1/42764,498 702,991 
FNMA, 4.00%, 11/1/45630,111 598,855 
FNMA, 4.00%, 2/1/461,653,406 1,569,574 
FNMA, 4.00%, 4/1/462,200,992 2,090,915 
FNMA, 3.50%, 2/1/472,510,001 2,299,191 
FNMA, 2.50%, 6/1/506,695,394 5,659,006 
FNMA, 3.00%, 6/1/508,620,914 7,573,702 
FNMA, 3.00%, 6/1/516,764,795 6,005,622 
FNMA, 4.00%, 8/1/512,197,430 2,045,749 
FNMA, 2.50%, 12/1/512,892,852 2,440,298 
FNMA, 2.50%, 1/1/522,995,818 2,525,458 
FNMA, 2.00%, 3/1/5211,957,465 9,730,888 
FNMA, 2.50%, 3/1/525,738,563 4,851,807 
FNMA, 3.00%, 3/1/529,373,825 8,232,990 
FNMA, 3.50%, 4/1/521,112,532 1,003,759 
FNMA, 4.00%, 4/1/522,382,670 2,218,759 
FNMA, 4.00%, 4/1/526,015,766 5,614,698 
FNMA, 4.00%, 4/1/522,015,802 1,878,000 
FNMA, 3.00%, 5/1/525,706,793 4,992,237 
FNMA, 3.00%, 5/1/522,768,278 2,436,753 
FNMA, 3.50%, 5/1/523,496,728 3,183,051 
FNMA, 4.00%, 5/1/523,341,338 3,107,200 
FNMA, 4.00%, 5/1/525,242,115 4,877,603 
FNMA, 3.00%, 6/1/521,086,294 956,195 
FNMA, 5.00%, 6/1/525,184,709 5,067,170 
FNMA, 4.50%, 7/1/521,859,842 1,778,528 
FNMA, 4.00%, 6/1/57762,403 720,541 
FNMA, 4.00%, 11/1/59755,905 713,568 
GNMA, 6.00%, 1/20/39136,415 146,622 
GNMA, 4.00%, 12/15/40418,611 398,948 
GNMA, 3.50%, 6/20/422,197,948 2,044,260 
GNMA, 3.50%, 7/20/421,683,953 1,565,521 
GNMA, 2.00%, 10/20/5018,339,822 15,417,987 
GNMA, 3.50%, 2/20/51698,562 642,403 
GNMA, 3.50%, 6/20/511,776,449 1,630,641 
GNMA, 2.50%, 9/20/515,748,654 4,964,389 
GNMA, 2.50%, 1/20/525,745,152 4,958,578 
223,149,646 
TOTAL U.S. GOVERNMENT AGENCY MORTGAGE-BACKED SECURITIES
(Cost $250,445,355)
230,287,726 
8


Principal Amount/SharesValue
COLLATERALIZED MORTGAGE OBLIGATIONS — 9.8%


Farm Mortgage Trust, Series 2021-1, Class A, VRN, 2.18%, 1/25/51(2)
$5,233,133 $4,279,804 
FHLMC, Series 2812, Class MF, VRN, 3.27%, (1-month LIBOR plus 0.45%), 6/15/341,167,744 1,162,031 
FHLMC, Series 3076, Class BM SEQ, 4.50%, 11/15/25395,969 392,428 
FHLMC, Series 3153, Class FJ, VRN, 2.77%, (1-month LIBOR plus 0.38%), 5/15/36933,389 926,313 
FHLMC, Series 3397, Class GF, VRN, 3.32%, (1-month LIBOR plus 0.50%), 12/15/37411,927 409,230 
FHLMC, Series 3417, Class FA, VRN, 3.32%, (1-month LIBOR plus 0.50%), 11/15/37739,275 735,353 
FHLMC, Series 3778, Class L SEQ, 3.50%, 12/15/252,808,161 2,774,975 
FHLMC, Series K032, Class A2 SEQ, VRN, 3.31%, 5/25/232,130,000 2,113,163 
FHLMC, Series K039, Class A2 SEQ, 3.30%, 7/25/2412,510,000 12,254,671 
FHLMC, Series K041, Class A2 SEQ, 3.17%, 10/25/2415,000,000 14,583,878 
FHLMC, Series K043, Class A2 SEQ, 3.06%, 12/25/242,706,000 2,618,073 
FHLMC, Series KF32, Class A, VRN, 2.92%, (1-month LIBOR plus 0.37%), 5/25/24134,242 134,032 
FHLMC, Series KJ25, Class A2 SEQ, 2.61%, 1/25/262,192,284 2,089,533 
FNMA, Series 2005-103, Class FP, VRN, 3.38%, (1-month LIBOR plus 0.30%), 10/25/35984,488 974,586 
FNMA, Series 2009-89, Class FD, VRN, 3.68%, (1-month LIBOR plus 0.60%), 5/25/36507,294 507,127 
FNMA, Series 2016-11, Class FB, VRN, 2.70%, (1-month LIBOR plus 0.55%), 3/25/461,265,988 1,248,516 
FNMA, Series 2016-M13, Class FA, VRN, 3.04%, (1-month LIBOR plus 0.67%), 11/25/2329,714 29,696 
FNMA, Series 2017-M3, Class A2 SEQ, VRN, 2.55%, 12/25/266,918,200 6,354,638 
GNMA, Series 2007-5, Class FA, VRN, 3.15%, (1-month LIBOR plus 0.14%), 2/20/37310,430 309,271 
GNMA, Series 2010-14, Class QF, VRN, 3.39%, (1-month LIBOR plus 0.45%), 2/16/401,540,375 1,537,185 
GNMA, Series 2021-151, Class AB SEQ, 1.75%, 2/16/624,391,205 3,725,091 
GNMA, Series 2021-164, Class AH SEQ, 1.50%, 10/16/633,923,608 3,182,989 
Seasoned Loans Structured Transaction Trust, Series 2021-2, Class A1D SEQ, 2.00%, 7/25/314,098,682 3,703,080 
TOTAL COLLATERALIZED MORTGAGE OBLIGATIONS
(Cost $70,702,832)
66,045,663 
ASSET-BACKED SECURITIES — 5.4%


Brazos Education Loan Authority, Inc., Series 2021-1, Class A1B, VRN, 3.66%, (1-month LIBOR plus 0.58%), 11/25/713,420,695 3,342,069 
Brazos Education Loan Authority, Inc., Series 2021-2, Class A1A SEQ, 2.06%, 1/25/72851,688 735,327 
Brazos Education Loan Authority, Inc., Series 2021-2, Class A1B, VRN, 3.78%, (1-month LIBOR plus 0.70%), 1/25/723,197,957 3,133,719 
ECMC Group Student Loan Trust, Series 2017-2A, Class A, VRN, 4.13%, (1-month LIBOR plus 1.05%), 5/25/67(2)
956,497 938,109 
ECMC Group Student Loan Trust, Series 2020-2A, Class A, VRN, 4.23%, (1-month LIBOR plus 1.15%), 11/25/69(2)
1,383,377 1,363,904 
ECMC Group Student Loan Trust, Series 2021-1A, Class A1B, VRN, 3.65%, (1-month LIBOR plus 0.57%), 11/25/70(2)
5,140,218 5,016,408 
Missouri Higher Education Loan Authority, Series 2021-3, Class A1B, VRN, 3.65%, (1-month LIBOR plus 0.57%), 8/25/613,554,064 3,410,946 
Navient Student Loan Trust, Series 2021-2A, Class A1A SEQ, 1.68%, 2/25/70(2)
453,059 392,807 
Navient Student Loan Trust, Series 2021-1A, Class A1B, VRN, 3.68%, (1-month LIBOR plus 0.60%), 12/26/69(2)
592,398 577,195 
9


Principal Amount/SharesValue
Nelnet Student Loan Trust, Series 2006-1, Class A6, VRN, 3.41%, (3-month LIBOR plus 0.45%), 8/23/36(2)
$5,433,350 $5,264,393 
North Texas Higher Education Authority, Inc., Series 2021-1, Class A1B, VRN, 3.65%, (1-month LIBOR plus 0.57%), 9/25/613,360,438 3,286,744 
North Texas Higher Education Authority, Inc., Series 2021-2, Class A1B, VRN, 3.65%, (1-month LIBOR plus 0.57%), 10/25/616,194,950 5,954,363 
Pennsylvania Higher Education Assistance Agency, Series 2021-1A, Class A, VRN, 3.61%, (1-month LIBOR plus 0.53%), 5/25/70(2)
3,447,114 3,363,657 
TOTAL ASSET-BACKED SECURITIES
(Cost $37,848,986)
36,779,641 
U.S. GOVERNMENT AGENCY SECURITIES — 2.5%


FNMA, 6.625%, 11/15/3013,000,000 15,191,993 
Tennessee Valley Authority, 1.50%, 9/15/312,100,000 1,678,718 
TOTAL U.S. GOVERNMENT AGENCY SECURITIES
(Cost $17,650,260)
16,870,711 
MUNICIPAL SECURITIES — 0.4%


Pasadena Rev., 4.625%, 5/1/25, Prerefunded at 100% of Par(3)
(Cost $2,979,466)
2,665,000 2,665,005 
SHORT-TERM INVESTMENTS — 5.8%


Money Market Funds
State Street Institutional U.S. Government Money Market Fund, Premier Class68,218 68,218 
Repurchase Agreements — 5.8%
BMO Capital Markets Corp., (collateralized by various U.S. Treasury obligations, 0.625% - 4.625%, 1/15/25 - 5/15/47, valued at $6,632,325), in a joint trading account at 2.86%, dated 9/30/22, due 10/3/22 (Delivery value $6,521,142)6,519,588 
Fixed Income Clearing Corp., (collateralized by various U.S. Treasury obligations, 1.25%, 6/30/28, valued at $33,269,382), at 2.95%, dated 9/30/22, due 10/3/22 (Delivery value $32,625,018)32,617,000 
39,136,588 
TOTAL SHORT-TERM INVESTMENTS
(Cost $39,204,806)
39,204,806 
TOTAL INVESTMENT SECURITIES — 101.1%
(Cost $730,070,778)

682,875,399 
OTHER ASSETS AND LIABILITIES — (1.1)%

(7,662,893)
TOTAL NET ASSETS — 100.0%

$675,212,506 

FUTURES CONTRACTS PURCHASED
Reference EntityContractsExpiration DateNotional
Amount
Unrealized
Appreciation
(Depreciation)^
U.S. Treasury 10-Year Notes97 December 2022$10,870,062 $(74,828)
U.S. Treasury 10-Year Ultra Notes110 December 202213,033,281 (137,902)
U.S. Treasury 2-Year Notes163 December 202233,478,672 39,382 
U.S. Treasury 5-Year Notes61 December 20226,557,977 10,373 
U.S. Treasury Long Bonds14 December 20221,769,688 (41,902)
U.S. Treasury Ultra Bonds21 December 20222,877,000 (63,791)
$68,586,680 $(268,668)
^Amount represents value and unrealized appreciation (depreciation).

10


NOTES TO SCHEDULE OF INVESTMENTS
FHLMC-Federal Home Loan Mortgage Corporation
FNMA-Federal National Mortgage Association
GNMA-Government National Mortgage Association
H15T1Y-Constant Maturity U.S. Treasury Note Yield Curve Rate Index
LIBOR-London Interbank Offered Rate
SEQ-Sequential Payer
USBMMY-U.S. Treasury Bill Money Market Yield
VRN-Variable Rate Note. The rate adjusts periodically based upon the terms set forth in the security’s offering documents. The rate shown is effective at the period end and the reference rate and spread, if any, is indicated. The security's effective maturity date may be shorter than the final maturity date shown.
Category is less than 0.05% of total net assets.
(1)Security, or a portion thereof, has been pledged at the custodian bank or with a broker for collateral requirements on futures contracts. At the period end, the aggregate value of securities pledged was $1,354,565.
(2)Security was purchased pursuant to Rule 144A or Section 4(2) under the Securities Act of 1933 and may be sold in transactions exempt from registration, normally to qualified institutional investors. The aggregate value of these securities at the period end was $21,196,277, which represented 3.1% of total net assets.
(3)Escrowed to maturity in U.S. government securities or state and local government securities.


See Notes to Financial Statements.
11


Statement of Assets and Liabilities
SEPTEMBER 30, 2022 (UNAUDITED)
Assets
Investment securities, at value (cost of $730,070,778)$682,875,399 
Receivable for investments sold49,349 
Receivable for capital shares sold417,582 
Interest receivable3,717,862 
687,060,192 
Liabilities
Payable for investments purchased10,407,223 
Payable for capital shares redeemed842,250 
Payable for variation margin on futures contracts214,929 
Accrued management fees213,776 
Distribution and service fees payable6,478 
Dividends payable163,030 
11,847,686 
Net Assets$675,212,506 
Net Assets Consist of:
Capital paid in$776,237,105 
Distributable earnings(101,024,599)
$675,212,506 

Net AssetsShares OutstandingNet Asset Value Per Share*
Investor Class$305,091,21331,741,896$9.61
I Class$116,155,49712,099,825$9.60
A Class$21,558,7812,243,298$9.61
C Class$1,207,094125,640$9.61
R Class$1,890,958196,812$9.61
R5 Class$229,308,96323,863,578$9.61
*Maximum offering price per share was equal to the net asset value per share for all share classes, except Class A, for which the maximum offering price per share was $10.06 (net asset value divided by 0.955). A contingent deferred sales charge may be imposed on redemptions of Class A and Class C.


See Notes to Financial Statements.
12


Statement of Operations
FOR THE SIX MONTHS ENDED SEPTEMBER 30, 2022 (UNAUDITED)
Investment Income (Loss)
Income:
Interest$9,783,633 
Expenses:
Management fees1,371,149 
Distribution and service fees:
A Class30,664 
C Class7,423 
R Class4,698 
Trustees' fees and expenses24,951 
Other expenses2,569 
1,441,454 
Net investment income (loss)8,342,179 
Realized and Unrealized Gain (Loss)
Net realized gain (loss) on:
Investment transactions(37,805,222)
Futures contract transactions(3,053,081)
Swap agreement transactions1,616,519 
(39,241,784)
Change in net unrealized appreciation (depreciation) on:
Investments(31,207,141)
Futures contracts117,291 
Swap agreements(1,969,976)
(33,059,826)
Net realized and unrealized gain (loss)(72,301,610)
Net Increase (Decrease) in Net Assets Resulting from Operations$(63,959,431)


See Notes to Financial Statements.
13


Statement of Changes in Net Assets
SIX MONTHS ENDED SEPTEMBER 30, 2022 (UNAUDITED) AND YEAR ENDED MARCH 31, 2022
Increase (Decrease) in Net Assets
September 30, 2022March 31, 2022
Operations
Net investment income (loss)$8,342,179 $10,212,872 
Net realized gain (loss)(39,241,784)(4,796,504)
Change in net unrealized appreciation (depreciation)(33,059,826)(32,570,340)
Net increase (decrease) in net assets resulting from operations(63,959,431)(27,153,972)
Distributions to Shareholders
From earnings:
Investor Class(3,948,202)(8,968,796)
I Class(1,605,586)(2,482,120)
A Class(258,605)(540,579)
C Class(9,946)(25,130)
R Class(17,642)(37,484)
R5 Class(3,094,491)(6,055,807)
Decrease in net assets from distributions(8,934,472)(18,109,916)
Capital Share Transactions
Net increase (decrease) in net assets from capital share transactions (Note 5)(11,288,650)(77,708,235)
Net increase (decrease) in net assets(84,182,553)(122,972,123)
Net Assets
Beginning of period759,395,059 882,367,182 
End of period$675,212,506 $759,395,059 


See Notes to Financial Statements.
14


Notes to Financial Statements

SEPTEMBER 30, 2022 (UNAUDITED)

1. Organization

American Century Government Income Trust (the trust) is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company and is organized as a Massachusetts business trust. Government Bond Fund (the fund) is one fund in a series issued by the trust. The fund’s investment objective is to seek high current income.

The fund offers the Investor Class, I Class, A Class, C Class, R Class and R5 Class. The A Class may incur an initial sales charge. The A Class and C Class may be subject to a contingent deferred sales charge.

2. Significant Accounting Policies

The following is a summary of significant accounting policies consistently followed by the fund in preparation of its financial statements. The fund is an investment company and follows accounting and reporting guidance in accordance with accounting principles generally accepted in the United States of America. This may require management to make certain estimates and assumptions at the date of the financial statements. Actual results could differ from these estimates. Management evaluated the impact of events or transactions occurring through the date the financial statements were issued that would merit recognition or disclosure.

Investment Valuations — The fund determines the fair value of its investments and computes its net asset value (NAV) per share at the close of regular trading (usually 4 p.m. Eastern time) on the New York Stock Exchange (NYSE) on each day the NYSE is open. The value of investments of the fund is determined by American Century Investment Management, Inc. (ACIM) (the investment advisor), as the valuation designee, pursuant to its valuation policies and procedures. The Board of Trustees oversees the valuation designee and reviews its valuation policies and procedures at least annually.

Fixed income securities are valued at the evaluated mean as provided by independent pricing services or at the mean of the most recent bid and asked prices as provided by investment dealers. U.S. Treasury, Government Agency and municipal securities are valued using market models that consider trade data, quotations from dealers and active market makers, relevant yield curve and spread data, creditworthiness, trade data or market information on comparable securities, and other relevant security specific information. Mortgage-related and asset-backed securities are valued based on models that consider trade data, prepayment and default projections, benchmark yield and spread data and estimated cash flows of each tranche of the issuer.

Open-end management investment companies are valued at the reported NAV per share. Repurchase agreements are valued at cost, which approximates fair value. Exchange-traded futures contracts are valued at the settlement price as provided by the appropriate exchange. Swap agreements are valued at an evaluated mean as provided by independent pricing services or independent brokers.

If the valuation designee determines that the market price for a portfolio security is not readily available or is believed by the valuation designee to be unreliable, such security is valued at fair value as determined in good faith by the valuation designee, in accordance with its policies and procedures. Circumstances that may cause the fund to determine that market quotations are not available or reliable include, but are not limited to: when there is a significant event subsequent to the market quotation; trading in a security has been halted during the trading day; or trading in a security is insufficient or did not take place due to a closure or holiday.

The valuation designee monitors for significant events occurring after the close of an investment’s primary exchange but before the fund’s NAV per share is determined. Significant events may include, but are not limited to: corporate announcements and transactions; regulatory news, governmental action and political unrest that could impact a specific investment or an investment sector; or armed conflicts, natural disasters and similar events that could affect investments in a specific country or region.

Security Transactions — Security transactions are accounted for as of the trade date. Net realized gains and losses are determined on the identified cost basis, which is also used for federal income tax purposes.

15


Investment Income — Interest income is recorded on the accrual basis and includes paydown gain (loss) and accretion of discounts and amortization of premiums. Inflation adjustments related to inflation-linked debt securities are reflected as interest income.

Repurchase Agreements — The fund may enter into repurchase agreements with institutions that ACIM has determined are creditworthy pursuant to criteria adopted by the Board of Trustees. The fund requires that the collateral, represented by securities, received in a repurchase transaction be transferred to the custodian in a manner sufficient to enable the fund to obtain those securities in the event of a default under the repurchase agreement. ACIM monitors, on a daily basis, the securities transferred to ensure the value, including accrued interest, of the securities under each repurchase agreement is equal to or greater than amounts owed to the fund under each repurchase agreement.

Joint Trading Account — Pursuant to an Exemptive Order issued by the Securities and Exchange Commission, the fund, along with certain other funds in the American Century Investments family of funds, may transfer uninvested cash balances into a joint trading account. These balances are invested in one or more repurchase agreements that are collateralized by U.S. Treasury or Agency obligations.

Segregated Assets — In accordance with the 1940 Act, the fund segregates assets on its books and records to cover certain types of investment securities and other financial instruments. ACIM monitors, on a daily basis, the securities segregated to ensure the fund designates a sufficient amount of liquid assets, marked-to-market daily. The fund may also receive assets or be required to pledge assets at the custodian bank or with a broker for collateral requirements.

Income Tax Status — It is the fund’s policy to distribute substantially all net investment income and net realized gains to shareholders and to otherwise qualify as a regulated investment company under provisions of the Internal Revenue Code. Accordingly, no provision has been made for income taxes. The fund files U.S. federal, state, local and non-U.S. tax returns as applicable. The fund's tax returns are subject to examination by the relevant taxing authority until expiration of the applicable statute of limitations, which is generally three years from the date of filing but can be longer in certain jurisdictions. At this time, management believes there are no uncertain tax positions which, based on their technical merit, would not be sustained upon examination and for which it is reasonably possible that the total amounts of unrecognized tax benefits will significantly change in the next twelve months.

Multiple Class — All shares of the fund represent an equal pro rata interest in the net assets of the class to which such shares belong, and have identical voting, dividend, liquidation and other rights and the same terms and conditions, except for class specific expenses and exclusive rights to vote on matters affecting only individual classes. Income, non-class specific expenses, and realized and unrealized capital gains and losses of the fund are allocated to each class of shares based on their relative net assets.

Distributions to Shareholders — Distributions from net investment income, if any, are declared daily and paid monthly. Distributions from net realized gains, if any, are generally declared and paid annually.

Indemnifications — Under the trust’s organizational documents, its officers and trustees are indemnified against certain liabilities arising out of the performance of their duties to the fund. In addition, in the normal course of business, the fund enters into contracts that provide general indemnifications. The maximum exposure under these arrangements is unknown as this would involve future claims that may be made against a fund. The risk of material loss from such claims is considered by management to be remote.

3. Fees and Transactions with Related Parties

Certain officers and trustees of the trust are also officers and/or directors of American Century Companies, Inc. (ACC). The trust's investment advisor, ACIM, the trust's distributor, American Century Investment Services, Inc. (ACIS), and the trust's transfer agent, American Century Services, LLC, are wholly owned, directly or indirectly, by ACC.

16


Management Fees — The trust has entered into a management agreement with ACIM, under which ACIM provides the fund with investment advisory and management services in exchange for a single, unified management fee (the fee) per class. The agreement provides that ACIM will pay all expenses of managing and operating the fund, except brokerage expenses, taxes, interest, fees and expenses of the independent trustees (including legal counsel fees), extraordinary expenses, and expenses incurred in connection with the provision of shareholder services and distribution services under a plan adopted pursuant to Rule 12b-1 under the 1940 Act. The fee is computed and accrued daily based on each class’s daily net assets and paid monthly in arrears. The difference in the fee among the classes is a result of their separate arrangements for non-Rule 12b-1 shareholder services. It is not the result of any difference in advisory or custodial fees or other expenses related to the management of the fund’s assets, which do not vary by class. The fee consists of (1) an Investment Category Fee based on the daily net assets of the fund and certain other accounts managed by the investment advisor that are in the same broad investment category as the fund and (2) a Complex Fee based on the assets of all funds in the American Century Investments family of funds that have the same investment advisor and distributor as the fund. For purposes of determining the Investment Category Fee and Complex Fee, the assets of funds managed by the investment advisor that invest exclusively in the shares of other funds (funds of funds) are not included.

The Investment Category Fee range, the Complex Fee range and the effective annual management fee for each class for the period ended September 30, 2022 are as follows:
Investment Category Fee RangeComplex Fee RangeEffective Annual
Management Fee
Investor Class
0.1625%
to 0.2800%
0.2500% to 0.3100%0.46%
I Class0.1500% to 0.2100%0.36%
A Class0.2500% to 0.3100%0.46%
C Class0.2500% to 0.3100%0.46%
R Class0.2500% to 0.3100%0.46%
R5 Class0.0500% to 0.1100%0.26%

Distribution and Service Fees — The Board of Trustees has adopted a separate Master Distribution and Individual Shareholder Services Plan for each of the A Class, C Class and R Class (collectively the plans), pursuant to Rule 12b-1 of the 1940 Act. The plans provide that the A Class will pay ACIS an annual distribution and service fee of 0.25%. The plans provide that the C Class will pay ACIS an annual distribution and service fee of 1.00%, of which 0.25% is paid for individual shareholder services and 0.75% is paid for distribution services. The plans provide that the R Class will pay ACIS an annual distribution and service fee of 0.50%. The fees are computed and accrued daily based on each class’s daily net assets and paid monthly in arrears. The fees are used to pay financial intermediaries for distribution and individual shareholder services. Fees incurred under the plans during the period ended September 30, 2022 are detailed in the Statement of Operations.

Trustees’ Fees and Expenses — The Board of Trustees is responsible for overseeing the investment advisor’s management and operations of the fund. The trustees receive detailed information about the fund and its investment advisor regularly throughout the year, and meet at least quarterly with management of the investment advisor to review reports about fund operations. The fund’s officers do not receive compensation from the fund.

Interfund Transactions — The fund may enter into security transactions with other American Century Investments funds and other client accounts of the investment advisor, in accordance with the 1940 Act rules and procedures adopted by the Board of Trustees. The rules and procedures require, among other things, that these transactions be effected at the independent current market price of the security. There were no interfund transactions during the period.

4. Investment Transactions

Purchases of investment securities, excluding short-term investments, for the period ended September 30, 2022 totaled $1,098,052,097, of which $1,095,324,932 represented U.S. Treasury and Government Agency obligations.

Sales of investment securities, excluding short-term investments, for the period ended September 30, 2022 totaled $1,154,883,528, of which $1,133,129,118 represented U.S. Treasury and Government Agency obligations.

17


5. Capital Share Transactions

Transactions in shares of the fund were as follows (unlimited number of shares authorized):
Six months ended
September 30, 2022
Year ended
March 31, 2022
SharesAmountSharesAmount
Investor Class
Sold2,137,615 $21,824,592 5,857,073 $66,058,552 
Issued in reinvestment of distributions353,377 3,570,068 734,549 8,271,509 
Redeemed(4,286,646)(43,542,801)(16,388,373)(185,896,403)
(1,795,654)(18,148,141)(9,796,751)(111,566,342)
I Class
Sold10,177,074 103,530,806 5,968,764 66,143,064 
Issued in reinvestment of distributions158,837 1,604,341 221,014 2,481,928 
Redeemed(10,204,996)(104,541,827)(3,400,092)(38,308,509)
130,915 593,320 2,789,686 30,316,483 
A Class
Sold232,062 2,362,337 872,723 9,809,469 
Issued in reinvestment of distributions18,817 190,082 35,071 394,442 
Redeemed(531,370)(5,428,380)(981,197)(11,063,502)
(280,491)(2,875,961)(73,403)(859,591)
C Class
Sold— — 37,149 422,301 
Issued in reinvestment of distributions986 9,946 2,232 25,126 
Redeemed(40,285)(405,566)(78,389)(882,666)
(39,299)(395,620)(39,008)(435,239)
R Class
Sold32,685 331,370 86,308 976,045 
Issued in reinvestment of distributions1,625 16,381 2,980 33,512 
Redeemed(12,268)(125,371)(135,272)(1,522,583)
22,042 222,380 (45,984)(513,026)
R5 Class
Sold3,415,876 34,895,388 6,015,780 67,660,894 
Issued in reinvestment of distributions267,720 2,703,117 465,840 5,239,327 
Redeemed(2,781,692)(28,283,133)(6,011,910)(67,550,741)
901,904 9,315,372 469,710 5,349,480 
Net increase (decrease)(1,060,583)$(11,288,650)(6,695,750)$(77,708,235)

6. Fair Value Measurements

The fund’s investments valuation process is based on several considerations and may use multiple inputs to determine the fair value of the investments held by the fund. In conformity with accounting principles generally accepted in the United States of America, the inputs used to determine a valuation are classified into three broad levels.

Level 1 valuation inputs consist of unadjusted quoted prices in an active market for identical investments.

Level 2 valuation inputs consist of direct or indirect observable market data (including quoted prices for comparable investments, evaluations of subsequent market events, interest rates, prepayment speeds, credit risk, etc.). These inputs also consist of quoted prices for identical investments initially expressed in local currencies that are adjusted through translation into U.S. dollars.

Level 3 valuation inputs consist of unobservable data (including a fund’s own assumptions).

18


The level classification is based on the lowest level input that is significant to the fair valuation measurement. The valuation inputs are not necessarily an indication of the risks associated with investing in these securities or other financial instruments.

The following is a summary of the level classifications as of period end. The Schedule of Investments provides additional information on the fund’s portfolio holdings.
Level 1Level 2Level 3
Assets
Investment Securities
U.S. Treasury Securities— $291,021,847 — 
U.S. Government Agency Mortgage-Backed Securities— 230,287,726 — 
Collateralized Mortgage Obligations— 66,045,663 — 
Asset-Backed Securities— 36,779,641 — 
U.S. Government Agency Securities— 16,870,711 — 
Municipal Securities— 2,665,005 — 
Short-Term Investments$68,218 39,136,588 — 
$68,218 $682,807,181 — 
Other Financial Instruments
Futures Contracts$49,755 — — 
Liabilities
Other Financial Instruments
Futures Contracts$318,423 — — 

7. Derivative Instruments

Interest Rate Risk — The fund is subject to interest rate risk in the normal course of pursuing its investment objectives. The value of bonds generally declines as interest rates rise. A fund may enter into futures contracts based on a bond index or a specific underlying security. A fund may purchase futures contracts to gain exposure to increases in market value or sell futures contracts to protect against a decline in market value. Upon entering into a futures contract, a fund will segregate cash, cash equivalents or other appropriate liquid securities on its records in amounts sufficient to meet requirements. Subsequent payments (variation margin) are made or received daily, in cash, by a fund. The variation margin is equal to the daily change in the contract value and is recorded as unrealized gains and losses. A fund recognizes a realized gain or loss when the futures contract is closed or expires. Net realized and unrealized gains or losses occurring during the holding period of futures contracts are a component of net realized gain (loss) on futures contract transactions and change in net unrealized appreciation (depreciation) on futures contracts, respectively. One of the risks of entering into futures contracts is the possibility that the change in value of the contract may not correlate with the changes in value of the underlying securities. The fund's average notional exposure to interest rate risk derivative instruments held during the period was $39,890,850 futures contracts purchased and $27,582,035 futures contracts sold.

19


Other Contracts — A fund may enter into total return swap agreements in order to attempt to obtain or preserve a particular return or spread at a lower cost than obtaining a return or spread through purchases and/or sales of instruments in other markets or gain exposure to certain markets in the most economical way possible. A fund will segregate cash, cash equivalents or other appropriate liquid securities on its records in amounts sufficient to meet requirements. Changes in value, including the periodic amounts of interest to be paid or received on swap agreements, are recorded as unrealized appreciation (depreciation) on swap agreements. Upon entering into a centrally cleared swap, a fund is required to deposit cash or securities (initial margin) with a financial intermediary in an amount equal to a certain percentage of the notional amount. Subsequent payments (variation margin) are made or received daily, in cash, by a fund. The variation margin is equal to the daily change in the value and is a component of unrealized gains and losses. Realized gain or loss is recorded upon receipt or payment of a periodic settlement or termination of swap agreements. Net realized and unrealized gains or losses occurring during the holding period of swap agreements are a component of net realized gain (loss) on swap agreement transactions and change in net unrealized appreciation (depreciation) on swap agreements, respectively. The risks of entering into swap agreements include the possible lack of liquidity, failure of the counterparty to meet its obligations, and that there may be unfavorable changes in the underlying investments or instruments, including inflationary risk. The fund's average notional amount held during the period was $18,000,000.

Value of Derivative Instruments as of September 30, 2022
Asset DerivativesLiability Derivatives
Type of Risk ExposureLocation on Statement of Assets and LiabilitiesValueLocation on Statement of Assets and LiabilitiesValue
Interest Rate RiskReceivable for variation margin on futures contracts*— Payable for variation margin on futures contracts*$214,929 
*Included in the unrealized appreciation (depreciation) on futures contracts as reported in the Schedule of Investments.

Effect of Derivative Instruments on the Statement of Operations for the Six Months Ended September 30, 2022
Net Realized Gain (Loss)Change in Net Unrealized Appreciation (Depreciation)
Type of Risk ExposureLocation on Statement of OperationsValueLocation on Statement of OperationsValue
Interest Rate RiskNet realized gain (loss) on futures contract transactions$(3,053,081)Change in net unrealized appreciation (depreciation) on futures contracts$117,291 
Other ContractsNet realized gain (loss) on swap agreement transactions1,616,519 Change in net unrealized appreciation (depreciation) on swap agreements(1,969,976)
$(1,436,562)$(1,852,685)

8. Risk Factors

The value of the fund’s shares will go up and down, sometimes rapidly or unpredictably, based on the performance of the securities owned by the fund and other factors generally affecting the securities market. Market risks, including political, regulatory, economic and social developments, can affect the value of the fund’s investments. Natural disasters, public health emergencies, war, terrorism and other unforeseeable events may lead to increased market volatility and may have adverse long-term effects on world economies and markets generally.

The fund may invest in instruments that have variable or floating coupon rates based on the London Interbank Offered Rate (LIBOR). LIBOR is a benchmark interest rate intended to be representative of the rate at which certain major international banks lend to one another over short-terms. Financial institutions have started the process of phasing out LIBOR and the transition process to a replacement rate may lead to increased volatility or illiquidity in markets for instruments that rely on LIBOR. This could result in a change to the value of such instruments or a change in the cost of temporary borrowing for the fund.

The fund’s investment process may result in high portfolio turnover, which could mean high transaction costs, affecting both performance and capital gains tax liabilities to investors.

20


9. Federal Tax Information

The book-basis character of distributions made during the year from net investment income or net realized gains may differ from their ultimate characterization for federal income tax purposes. These differences reflect the differing character of certain income items and net realized gains and losses for financial statement and tax purposes, and may result in reclassification among certain capital accounts on the financial statements.

As of period end, the components of investments for federal income tax purposes were as follows:
Federal tax cost of investments$732,227,039 
Gross tax appreciation of investments$178,077 
Gross tax depreciation of investments(49,529,717)
Net tax appreciation (depreciation) of investments$(49,351,640)

The difference between book-basis and tax-basis unrealized appreciation (depreciation) is attributable primarily to the tax deferral of losses on wash sales.

As of March 31, 2022, the fund had post-October capital loss deferrals of $(10,988,631), which represent certain qualified losses that the fund has elected to treat as having been incurred in the following fiscal year for federal income tax purposes.
21


Financial Highlights
For a Share Outstanding Throughout the Years Ended March 31 (except as noted)
Per-Share DataRatios and Supplemental Data
Income From Investment Operations:Distributions From:Ratio to Average Net Assets of:
Net Asset
Value,
Beginning
of Period
Net
Investment
Income
(Loss)(1)
Net
Realized
and
Unrealized
Gain (Loss)
Total From
Investment
Operations
Net
Investment
Income
Net
Realized
Gains
Total
Distributions
Net Asset
Value,
End
of Period
Total
Return(2)
Operating
Expenses
Net
Investment
Income
(Loss)
Portfolio
Turnover
Rate
Net
Assets,
End of
Period
(in thousands)
Investor Class
2022(3)
$10.650.11(1.03)(0.92)(0.12)(0.12)$9.61(8.69)%
0.47%(4)
2.20%(4)
150%$305,091 
2022$11.310.14(0.55)(0.41)(0.17)(0.08)(0.25)$10.65(3.76)%0.46%1.20%364%$357,145 
2021$11.690.12(0.28)(0.16)(0.17)(0.05)(0.22)$11.31(1.39)%0.47%1.05%246%$490,142 
2020$10.890.230.841.07(0.27)(0.27)$11.699.92%0.47%2.09%103%$508,040 
2019$10.750.240.170.41(0.27)(0.27)$10.893.93%0.47%2.28%157%$449,565 
2018$10.950.20(0.16)0.04(0.24)(0.24)$10.750.34%0.47%1.85%160%$473,495 
I Class
2022(3)
$10.640.12(1.04)(0.92)(0.12)(0.12)$9.60(8.65)%
0.37%(4)
2.30%(4)
150%$116,155 
2022$11.300.14(0.54)(0.40)(0.18)(0.08)(0.26)$10.64(3.67)%0.36%1.30%364%$127,299 
2021$11.670.13(0.27)(0.14)(0.18)(0.05)(0.23)$11.30(1.21)%0.37%1.15%246%$103,700 
2020$10.870.240.841.08(0.28)(0.28)$11.6710.05%0.37%2.19%103%$54,971 
2019$10.740.260.150.41(0.28)(0.28)$10.873.94%0.37%2.38%157%$14,065 
2018(5)
$10.960.21(0.19)0.02(0.24)(0.24)$10.740.20%
0.37%(4)
2.00%(4)
160%(6)
$6,039 



For a Share Outstanding Throughout the Years Ended March 31 (except as noted)
Per-Share DataRatios and Supplemental Data
Income From Investment Operations:Distributions From:Ratio to Average Net Assets of:
Net Asset
Value,
Beginning
of Period
Net
Investment
Income
(Loss)(1)
Net
Realized
and
Unrealized
Gain (Loss)
Total From
Investment
Operations
Net
Investment
Income
Net
Realized
Gains
Total
Distributions
Net Asset
Value,
End
of Period
Total
Return(2)
Operating
Expenses
Net
Investment
Income
(Loss)
Portfolio
Turnover
Rate
Net
Assets,
End of
Period
(in thousands)
A Class
2022(3)
$10.650.10(1.03)(0.93)(0.11)(0.11)$9.61(8.81)%
0.72%(4)
1.95%(4)
150%$21,559 
2022$11.310.11(0.55)(0.44)(0.14)(0.08)(0.22)$10.65(4.00)%0.71%0.95%364%$26,872 
2021$11.680.10(0.28)(0.18)(0.14)(0.05)(0.19)$11.31(1.55)%0.72%0.80%246%$29,374 
2020$10.880.210.831.04(0.24)(0.24)$11.689.66%0.72%1.84%103%$49,587 
2019$10.750.220.160.38(0.25)(0.25)$10.883.58%0.72%2.03%157%$58,964 
2018$10.950.18(0.17)0.01(0.21)(0.21)$10.750.09%0.72%1.60%160%$66,630 
C Class
2022(3)
$10.640.06(1.02)(0.96)(0.07)(0.07)$9.61(9.06)%
1.47%(4)
1.20%(4)
150%$1,207 
2022$11.310.02(0.55)(0.53)(0.06)(0.08)(0.14)$10.64(4.81)%1.46%0.20%364%$1,756 
2021$11.680.01(0.27)(0.26)(0.06)(0.05)(0.11)$11.31(2.29)%1.47%0.05%246%$2,306 
2020$10.880.120.830.95(0.15)(0.15)$11.688.84%1.47%1.09%103%$2,934 
2019$10.740.140.170.31(0.17)(0.17)$10.882.90%1.47%1.28%157%$2,080 
2018$10.950.10(0.18)(0.08)(0.13)(0.13)$10.74(0.75)%1.47%0.85%160%$4,547 
R Class
2022(3)
$10.640.09(1.03)(0.94)(0.09)(0.09)$9.61(8.84)%
0.97%(4)
1.70%(4)
150%$1,891 
2022$11.310.08(0.56)(0.48)(0.11)(0.08)(0.19)$10.64(4.33)%0.96%0.70%364%$1,860 
2021$11.680.06(0.27)(0.21)(0.11)(0.05)(0.16)$11.31(1.80)%0.97%0.55%246%$2,496 
2020$10.880.180.831.01(0.21)(0.21)$11.689.39%0.97%1.59%103%$2,813 
2019$10.740.190.170.36(0.22)(0.22)$10.883.42%0.97%1.78%157%$2,394 
2018$10.950.15(0.18)(0.03)(0.18)(0.18)$10.74(0.25)%0.97%1.35%160%$3,158 



For a Share Outstanding Throughout the Years Ended March 31 (except as noted)
Per-Share DataRatios and Supplemental Data
Income From Investment Operations:Distributions From:Ratio to Average Net Assets of:
Net Asset
Value,
Beginning
of Period
Net
Investment
Income
(Loss)(1)
Net
Realized
and
Unrealized
Gain (Loss)
Total From
Investment
Operations
Net
Investment
Income
Net
Realized
Gains
Total
Distributions
Net Asset
Value,
End
of Period
Total
Return(2)
Operating
Expenses
Net
Investment
Income
(Loss)
Portfolio
Turnover
Rate
Net
Assets,
End of
Period
(in thousands)
R5 Class
2022(3)
$10.650.12(1.03)(0.91)(0.13)(0.13)$9.61(8.60)%
0.27%(4)
2.40%(4)
150%$229,309 
2022$11.310.16(0.55)(0.39)(0.19)(0.08)(0.27)$10.65(3.57)%0.26%1.40%364%$244,463 
2021$11.680.15(0.27)(0.12)(0.20)(0.05)(0.25)$11.31(1.11)%0.27%1.25%246%$254,349 
2020$10.880.250.841.09(0.29)(0.29)$11.6810.15%0.27%2.29%103%$230,808 
2019$10.750.260.170.43(0.30)(0.30)$10.884.04%0.27%2.48%157%$192,572 
2018$10.950.23(0.17)0.06(0.26)(0.26)$10.750.54%0.27%2.05%160%$199,819 

Notes to Financial Highlights
(1)Computed using average shares outstanding throughout the period.
(2)Total returns are calculated based on the net asset value of the last business day and do not reflect applicable sales charges, if any. Total returns for periods less than one year are not annualized.
(3)Six months ended September 30, 2022 (unaudited).
(4)Annualized.
(5)April 10, 2017 (commencement of sale) through March 31, 2018.
(6)Portfolio turnover is calculated at the fund level. Percentage indicated was calculated for the year ended March 31, 2018.


See Notes to Financial Statements.



Approval of Management Agreement

At a meeting held on June 21, 2022, the Fund’s Board of Trustees (the "Board") unanimously approved the renewal of the management agreement pursuant to which American Century Investment Management, Inc. (the “Advisor”) acts as the investment advisor for the Fund. Under Section 15(c) of the Investment Company Act of 1940 (the “Investment Company Act”), contracts for investment advisory services are required to be reviewed, evaluated, and approved by a majority of a fund’s Trustees, including a majority of the independent Trustees, each year. The Board regards this annual evaluation and renewal as one of its most important responsibilities.

The independent Trustees have memorialized a statement regarding the relationship between their ongoing obligations to oversee and evaluate the performance of the Advisor and their annual consideration of renewal of the management agreement. In that statement, the independent Trustees noted that their assessment of the Advisor’s performance is an ongoing process that takes place over the entire year and is informed by all of the extensive information that the Board and its committees receive and consider over time. This information, together with the additional materials provided specifically in connection with the review, are central to the Board’s assessment of the Advisor’s performance and its determination whether to renew the Fund’s management agreement.

Prior to its consideration of the renewal of the management agreement, the Board requested and reviewed data and analysis relating to the proposed renewal. This information and analysis was compiled by the Advisor and certain independent providers of evaluation data concerning the Fund.

In connection with its consideration of the renewal of the management agreement, the Board’s review and evaluation of the services provided by the Advisor and its affiliates included, but was not limited to, the following:

the nature, extent, and quality of investment management, shareholder services, and other services provided and to be provided to the Fund including without limitation portfolio management and trading services, shareholder and intermediary service levels and quality, compliance and legal services, fund accounting and financial reporting, and fund share distribution;
the wide range of other programs and services provided by the Advisor and its affiliates to the Fund and its shareholders on a routine and non-routine basis;
the Fund’s investment performance, including data comparing the Fund’s performance to appropriate benchmarks and/or a peer group of other mutual funds with similar investment objectives and strategies;
the cost of owning the Fund compared to the cost of owning similarly-managed funds;
the compliance policies, procedures, and regulatory experience of the Advisor and its affiliates and certain other Fund service providers;
financial data showing the cost of services provided by the Advisor and its affiliates to the Fund, the profitability of the Fund to the Advisor, and the overall profitability of the Advisor;
the Advisor’s strategic plans, generally, and with respect to the ongoing impact of the COVID-19 pandemic response, heightened areas of interest in the mutual fund industry and recent geopolitical issues;
the Advisor’s business continuity plans, vendor management practices, and cyber security practices;
any economies of scale associated with the Advisor’s management of the Fund;
services provided and charges to the Advisor’s other investment management clients;
fees and expenses associated with any investment by the Fund in other funds;
payments and practices in connection with financial intermediaries holding shares of the Fund on behalf of their clients and the services provided by intermediaries in connection therewith; and
any collateral benefits derived by the Advisor from the management of the Fund.
25


In keeping with its practice, the Board held two meetings and the independent Trustees met in private session to discuss the renewal and to review and discuss the information provided in response to their request. The Board held active discussions with the Advisor regarding the renewal of the management agreement. The independent Trustees had the benefit of the advice of their independent counsel throughout the process.

Factors Considered

The Trustees considered all of the information provided by the Advisor, the independent data providers, and the independent Trustees’ independent counsel in connection with the approval. They determined that the information was sufficient for them to evaluate the management agreement for the Fund. In connection with their review, the Trustees did not identify any single factor as being all-important or controlling and each Trustee may have attributed different levels of importance to different factors. In deciding to renew the management agreement, the Board based its decision on a number of factors, including the following:

Nature, Extent and Quality of Services — Generally. Under the management agreement, the Advisor is responsible for providing or arranging for all services necessary for the operation of the Fund. The Board noted that the Advisor provides or arranges at its own expense a wide variety of services including:

constructing and designing the Fund
portfolio research and security selection
initial capitalization/funding
securities trading
Fund administration
custody of Fund assets
daily valuation of the Fund’s portfolio
shareholder servicing and transfer agency, including shareholder confirmations, recordkeeping, and communications
legal services (except the independent Trustees’ counsel)
regulatory and portfolio compliance
financial reporting
marketing and distribution (except amounts paid by the Fund under Rule 12b-1 plans)

The Board noted that many of these services have expanded over time in terms of both quantity and complexity in response to shareholder demands, competition in the industry, changing distribution channels, and the changing regulatory environment.

Investment Management Services. The nature of the investment management services provided to the Fund is quite complex and allows Fund shareholders access to professional money management, instant diversification of their investments within an asset class, the opportunity to easily diversify among asset classes by investing in or exchanging among various American Century Investments funds, and liquidity. In evaluating investment performance, the Board expects the Advisor to manage the Fund in accordance with its investment objectives and principal investment strategies. Further, the Trustees recognize that the Advisor has an obligation to seek the best execution of fund trades. In providing these services, the Advisor utilizes teams of investment professionals (portfolio managers, analysts, research assistants, and securities traders) who require extensive information technology, research, training, compliance, and other systems to conduct their business. The Board, directly and through its Portfolio Committee, regularly reviews investment performance information for the Fund, together with comparative information for appropriate benchmarks and/or peer groups of similarly-managed funds, over different time horizons. The Trustees also review investment performance information during the management agreement renewal process. If performance concerns are identified, the Fund receives special reviews until performance improves, during which the Board discusses with the Advisor the reasons for such results (e.g., market conditions, security selection) and any actions being taken to improve performance. The Fund’s performance was above its benchmark for the one-, three-, five-, and ten-year periods reviewed by the Board. The Board found the investment management
26


services provided by the Advisor to the Fund to be satisfactory and consistent with the management agreement.

Shareholder and Other Services. Under the management agreement, the Advisor, either directly or through affiliates or third parties, provides the Fund with a comprehensive package of transfer agency, shareholder, and other services. The Board, directly and through its various committees, regularly reviews reports and evaluations of such services at its regular meetings. These reports include, but are not limited to, information regarding the operational efficiency and accuracy of the shareholder and transfer agency services provided, staffing levels, shareholder satisfaction, technology support (including cyber security), new products and services offered to Fund shareholders, securities trading activities, portfolio valuation services, auditing services, and legal and operational compliance activities. The Board found the services provided by the Advisor to the Fund under the management agreement to be competitive and of high quality.

Costs of Services and Profitability. The Advisor provides detailed information concerning its cost of providing various services to the Fund, its profitability in managing the Fund, its overall profitability, and its financial condition. The Trustees have reviewed with the Advisor the methodology used to prepare this financial information. This information is considered in evaluating the Advisor’s financial condition, its ability to continue to provide services under the management agreement, and the reasonableness of the current management fee. The Board concluded that the Advisor’s profits were reasonable in light of the services provided to the Fund.

Ethics. The Board generally considers the Advisor’s commitment to providing quality services to shareholders and to conducting its business ethically. They noted that the Advisor’s practices generally meet or exceed industry best practices.

Economies of Scale. The Board also reviewed information provided by the Advisor regarding the possible existence of economies of scale in connection with the management of the Fund. The Board concluded that economies of scale are difficult to measure and predict with precision, especially on a fund-by-fund basis. The Board concluded that the Advisor is appropriately sharing economies of scale, to the extent they exist, through its fee structure and through reinvestment in its business, infrastructure, investment capabilities and initiatives to provide shareholders enhanced and expanded services.

Comparison to Other Funds’ Fees. The management agreement provides that the Fund pays the Advisor a single, all-inclusive (or unified) management fee for providing all services necessary for the management and operation of the Fund, other than securities transaction expenses, taxes, interest, extraordinary expenses, fees and expenses of the Fund’s independent Trustees (including their independent legal counsel), and expenses incurred in connection with the provision of shareholder services and distribution services under a plan adopted pursuant to Rule 12b-1 under the Investment Company Act. Under this unified fee structure, the Advisor is responsible for providing all investment advisory, custody, audit, administrative, compliance, recordkeeping, marketing, and shareholder services, or arranging and supervising third parties to provide such services. By contrast, most other funds are charged a variety of fees, including an investment advisory fee, a transfer agency fee, an administrative fee, and other expenses. Other than their investment advisory fees and any applicable Rule 12b-1 distribution fees, all other components of the total fees charged by these other funds may be increased without shareholder approval. The Board believes the unified fee structure is a benefit to Fund shareholders because it clearly discloses to shareholders the cost of owning Fund shares, and, since the unified fee cannot be increased without a vote of Fund shareholders, it shifts to the Advisor the risk of increased costs of operating the Fund and provides a direct incentive to minimize administrative inefficiencies. Part of the Board’s analysis of fee levels involves reviewing certain evaluative data compiled by an independent provider and comparing the Fund’s unified fee to the total expense ratio of peer funds. The unified fee charged to shareholders of the Fund was below the median of the total expense ratios of the Fund’s peer group. The Board concluded that the management fee paid by the Fund to the Advisor under the management agreement is reasonable in light of the services provided to the Fund.
27


Comparison to Fees and Services Provided to Other Clients of the Advisor. The Board also requested and received information from the Advisor concerning the nature of the services, fees, costs, and profitability of its advisory services to advisory clients other than the Fund. They observed that these varying types of client accounts require different services and involve different regulatory and entrepreneurial risks than the management of the Fund. The Board analyzed this information and concluded that the fees charged and services provided to the Fund were reasonable by comparison.

Payments to Intermediaries. The Trustees also requested and received a description of payments made to intermediaries by the Fund and the Advisor and services provided by intermediaries. These payments include various payments made by the Fund or the Advisor to different types of intermediaries and recordkeepers for distribution and service activities provided with respect to the Fund. The Trustees reviewed such information and received representations from the Advisor that all such payments by the Fund were made pursuant to the Fund’s Rule 12b-1 Plan and that all such payments by the Advisor were made from the Advisor’s resources and reasonable profits.

Collateral or “Fall-Out” Benefits Derived by the Advisor. The Board considered the possible existence of collateral benefits the Advisor may receive as a result of its relationship with the Fund. The Board noted that the Advisor’s primary business is managing funds and it generally does not use fund or shareholder information to generate profits in other lines of business, and therefore does not derive any significant collateral benefits from them. The Board noted that the Advisor may receive proprietary research from broker-dealers that execute fund portfolio transactions. The Board also determined that the Advisor is able to provide investment management services to certain clients other than the Fund, at least in part, due to its existing infrastructure built to serve the fund complex. The Board also noted that the assets of those other accounts are, where applicable, included with the assets of the Fund to determine breakpoints in the management fee schedule.

Existing Relationship. The Board also considered whether there was any reason for not continuing the existing arrangement with the Advisor. In this regard, the Board was mindful of the potential disruptions of the Fund’s operations and various risks, uncertainties, and other effects that could occur as a result of a decision not to continue such relationship. In particular, the Board recognized that most shareholders have invested in the Fund on the strength of the Advisor’s industry standing and reputation and in the expectation that the Advisor will have a continuing role in providing advisory services to the Fund.

Conclusion of the Trustees. As a result of this process, the Board, including all of the independent Trustees, taking into account all of the factors discussed above and the information provided by the Advisor and others in connection with its review and throughout the year, concluded that the terms of the management agreement are fair and reasonable and that the management fee charged to the Fund is reasonable in light of the services provided and that the management agreement between the Fund and the Advisor should be renewed for an additional one-year period.

28


Additional Information

Retirement Account Information

As required by law, distributions you receive from certain retirement accounts are subject to federal income tax withholding, unless you elect not to have withholding apply*. Tax will be withheld on the total amount withdrawn even though you may be receiving amounts that are not subject to withholding, such as nondeductible contributions. In such case, excess amounts of withholding could occur. You may adjust your withholding election so that a greater or lesser amount will be withheld.

If you don’t want us to withhold on this amount, you must notify us to not withhold the federal income tax. You may notify us in writing or in certain situations by telephone or through other electronic means. For systematic withdrawals, your withholding election will remain in effect until revoked or changed by filing a new election. You have the right to revoke your election at any time and change your withholding percentage for future distributions.

Remember, even if you elect not to have income tax withheld, you are liable for paying income tax on the taxable portion of your withdrawal. If you elect not to have income tax withheld or you don’t have enough income tax withheld, you may be responsible for payment of estimated tax. You may incur penalties under the estimated tax rules if your withholding and estimated tax payments are not sufficient. You can reduce or defer the income tax on a distribution by directly or indirectly rolling such distribution over to another IRA or eligible plan. You should consult your tax advisor for additional information.

State tax will be withheld if, at the time of your distribution, your address is within one of the mandatory withholding states and you have federal income tax withheld (or as otherwise required by state law). State taxes will be withheld from your distribution in accordance with the respective state rules.

*Some 403(b), 457 and qualified retirement plan distributions may be subject to 20% mandatory withholding, as they are subject to special tax and withholding rules.  Your plan administrator or plan sponsor is required to provide you with a special tax notice explaining those rules at the time you request a distribution.  If applicable, federal and/or state taxes may be withheld from your distribution amount.


Proxy Voting Policies

Descriptions of the principles and policies that the fund's investment advisor uses in exercising the voting rights associated with the securities purchased and/or held by the fund are available without charge, upon request, by calling 1-800-345-2021 or visiting American Century Investments’ website at americancentury.com/proxy. A description of the policies is also available on the Securities and Exchange Commission’s website at sec.gov. Information regarding how the investment advisor voted proxies relating to portfolio securities during the most recent 12-month period ended June 30 is available on americancentury.com/proxy. It is also available at sec.gov.


Quarterly Portfolio Disclosure

The fund files its complete schedule of portfolio holdings with the Securities and Exchange Commission (SEC) for the first and third quarters of each fiscal year as an exhibit to its reports on Form N-PORT. These portfolio holdings are available on the fund's website at americancentury.com and, upon request, by calling 1-800-345-2021. The fund’s Form N-PORT reports are available on the SEC’s website at sec.gov.

29


Notes

30


Notes

31


Notes

32






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Investor Services Representative1-800-345-2021
or 816-531-5575
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American Century Government Income Trust
Investment Advisor:
American Century Investment Management, Inc.
Kansas City, Missouri
This report and the statements it contains are submitted for the general information of our shareholders. The report is not authorized for distribution to prospective investors unless preceded or accompanied by an effective prospectus.
©2022 American Century Proprietary Holdings, Inc. All rights reserved.
CL-SAN-90810 2211




    


acihorizblkd45.jpg
Semiannual Report
September 30, 2022
Inflation-Adjusted Bond Fund
Investor Class (ACITX)
I Class (AIAHX)
Y Class (AIAYX)
A Class (AIAVX)
C Class (AINOX)
R Class (AIARX)
R5 Class (AIANX)
R6 Class (AIADX)
G Class (AINGX)













Table of Contents
President’s Letter
Fund Characteristics
Shareholder Fee Example
Schedule of Investments
Statement of Assets and Liabilities
Statement of Operations
Statement of Changes in Net Assets
Notes to Financial Statements
Financial Highlights
Approval of Management Agreement
Additional Information


























Any opinions expressed in this report reflect those of the author as of the date of the report, and do not necessarily represent the opinions of American Century Investments® or any other person in the American Century Investments organization. Any such opinions are subject to change at any time based upon market or other conditions and American Century Investments disclaims any responsibility to update such opinions. These opinions may not be relied upon as investment advice and, because investment decisions made by American Century Investments funds are based on numerous factors, may not be relied upon as an indication of trading intent on behalf of any American Century Investments fund. Security examples are used for representational purposes only and are not intended as recommendations to purchase or sell securities. Performance information for comparative indices and securities is provided to American Century Investments by third party vendors. To the best of American Century Investments’ knowledge, such information is accurate at the time of printing.



President’s Letter
image6.jpg Jonathan Thomas

Dear Investor:

Thank you for reviewing this semiannual report for the period ending September 30, 2022. It provides a market overview (below), followed by a schedule of fund investments and other financial information. For additional investment insights, please visit americancentury.com.

Inflation, Rates, Recession Worries Weighed on Financial Markets

The reporting period began with financial markets digesting the effects of soaring inflation, heightened market volatility and slowing growth. For more than a year, the effects of massive fiscal and monetary support, escalating energy prices, supply chain breakdowns and labor market shortages had driven inflation to multidecade highs. The Russia-Ukraine war continued to nudge commodity prices even higher, exacerbating existing inflationary pressures and further damaging global supply chains.

The Federal Reserve (Fed), which began tightening in March with a 25-basis-points (bps) hike, increased rates an additional 275 bps during the six-month period. Inflation was slow to respond, climbing to a 40-year-high 9.1% in June before slipping to 8.2% in September, largely due to falling gasoline prices. Policymakers indicated taming inflation remains their priority, even as the economy contracted in 2022’s first two quarters and an official recession appeared imminent.

In addition to fueling recession risk, the combination of elevated inflation and a hawkish Fed helped push Treasury yields sharply higher and stock prices significantly lower. Amid persistent market unrest, most stock and bond indices ended the six-month period with steep losses. Stocks, as measured by the S&P 500 Index, plunged more than 20%, while bonds, as measured by the Bloomberg U.S. Aggregate Bond Index, tumbled more than 9%.

Staying Disciplined in Uncertain Times

We expect market volatility to linger as investors navigate a complex environment of high inflation, rising interest rates and economic uncertainty. In addition, Russia’s invasion of Ukraine complicates an increasingly tense geopolitical backdrop and threatens global energy markets. We will continue to monitor this evolving situation and what it broadly means for investors across asset classes.

We appreciate your confidence in us during these extraordinary times. Our firm has a long history of helping clients weather unpredictable markets, and we’re confident we will continue to meet today’s challenges.

Sincerely,
image48a16.jpg
Jonathan Thomas
President and Chief Executive Officer
American Century Investments
2


Fund Characteristics
SEPTEMBER 30, 2022
Types of Investments in Portfolio% of net assets
U.S. Treasury Securities87.9%
Corporate Bonds2.0%
Collateralized Loan Obligations2.0%
Asset-Backed Securities1.7%
Commercial Mortgage-Backed Securities0.9%
Collateralized Mortgage Obligations0.7%
Short-Term Investments4.8%
Other Assets and Liabilities
—*
*Category is less than 0.05% of total net assets.
3


Shareholder Fee Example

Fund shareholders may incur two types of costs: (1) transaction costs, including sales charges (loads) on purchase payments and redemption/exchange fees; and (2) ongoing costs, including management fees; distribution and service (12b-1) fees; and other fund expenses. This example is intended to help you understand your ongoing costs (in dollars) of investing in your fund and to compare these costs with the ongoing cost of investing in other mutual funds.

The example is based on an investment of $1,000 made at the beginning of the period and held for the entire period from April 1, 2022 to September 30, 2022.

Actual Expenses

The table provides information about actual account values and actual expenses for each class. You may use the information, together with the amount you invested, to estimate the expenses that you paid over the period. First, identify the share class you own. Then simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number under the heading “Expenses Paid During Period” to estimate the expenses you paid on your account during this period.

If you hold Investor Class shares of any American Century Investments mutual fund, or I Class shares of the American Century Diversified Bond Fund, in an American Century Investments account (i.e., not through a financial intermediary or employer-sponsored retirement plan account), American Century Investments may charge you a $25 annual account maintenance fee if the value of those shares is less than $10,000. We will redeem shares automatically in one of your accounts to pay the $25 fee. In determining your total eligible investment amount, we will include your investments in all personal accounts (including American Century Investments brokerage accounts) registered under your Social Security number. Personal accounts include individual accounts, joint accounts, UGMA/UTMA accounts, personal trusts, Coverdell Education Savings Accounts and IRAs (including traditional, Roth, Rollover, SEP-, SARSEP- and SIMPLE-IRAs), and certain other retirement accounts. If you have only business, business retirement, employer-sponsored or American Century Investments brokerage accounts, you are currently not subject to this fee. If you are subject to the account maintenance fee, your account value could be reduced by the fee amount.

Hypothetical Example for Comparison Purposes

The table also provides information about hypothetical account values and hypothetical expenses based on the actual expense ratio of each class of your fund and an assumed rate of return of 5% per year before expenses, which is not the actual return of a fund’s share class. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in your fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds.

Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transactional costs, such as sales charges (loads) or redemption/exchange fees. Therefore, the table is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. In addition, if these transactional costs were included, your costs would have been higher.

4


Beginning
Account Value
4/1/22
Ending
Account Value
9/30/22
Expenses Paid
During Period(1)
4/1/22 - 9/30/22
Annualized
Expense Ratio(1)
Actual
Investor Class$1,000$883.60$2.310.49%
I Class$1,000$883.80$1.840.39%
Y Class$1,000$884.30$1.370.29%
A Class$1,000$882.10$3.490.74%
C Class$1,000$878.70$7.021.49%
R Class$1,000$880.80$4.670.99%
R5 Class$1,000$884.30$1.370.29%
R6 Class$1,000$884.40$1.130.24%
G Class$1,000$885.50$0.140.03%
Hypothetical
Investor Class$1,000$1,022.61$2.480.49%
I Class$1,000$1,023.11$1.980.39%
Y Class$1,000$1,023.62$1.470.29%
A Class$1,000$1,021.36$3.750.74%
C Class$1,000$1,017.60$7.541.49%
R Class$1,000$1,020.11$5.010.99%
R5 Class$1,000$1,023.62$1.470.29%
R6 Class$1,000$1,023.87$1.220.24%
G Class$1,000$1,024.92$0.150.03%
(1)Expenses are equal to the class's annualized expense ratio listed in the table above, multiplied by the average account value over the period, multiplied by 183, the number of days in the most recent fiscal half-year, divided by 365, to reflect the one-half year period. Annualized expense ratio reflects actual expenses, including any applicable fee waivers or expense reimbursements and excluding any acquired fund fees and expenses.
5


Schedule of Investments

SEPTEMBER 30, 2022 (UNAUDITED)
Principal AmountValue
U.S. TREASURY SECURITIES — 87.9%



U.S. Treasury Inflation Indexed Bonds, 2.375%, 1/15/25$48,859,421 $49,054,448 
U.S. Treasury Inflation Indexed Bonds, 2.00%, 1/15/26134,075,212 133,693,251 
U.S. Treasury Inflation Indexed Bonds, 2.375%, 1/15/2776,137,144 77,316,535 
U.S. Treasury Inflation Indexed Bonds, 1.75%, 1/15/2820,563,882 20,372,486 
U.S. Treasury Inflation Indexed Bonds, 3.625%, 4/15/2848,058,055 52,254,259 
U.S. Treasury Inflation Indexed Bonds, 2.50%, 1/15/2938,123,050 39,470,973 
U.S. Treasury Inflation Indexed Bonds, 3.875%, 4/15/2941,180,270 46,144,360 
U.S. Treasury Inflation Indexed Bonds, 3.375%, 4/15/323,505,152 3,999,005 
U.S. Treasury Inflation Indexed Bonds, 0.75%, 2/15/4285,323,086 68,718,344 
U.S. Treasury Inflation Indexed Bonds, 0.625%, 2/15/4368,013,891 52,381,204 
U.S. Treasury Inflation Indexed Bonds, 1.375%, 2/15/4487,231,116 77,761,010 
U.S. Treasury Inflation Indexed Bonds, 0.75%, 2/15/4564,039,326 49,474,845 
U.S. Treasury Inflation Indexed Bonds, 1.00%, 2/15/466,064,295 4,925,829 
U.S. Treasury Inflation Indexed Bonds, 0.875%, 2/15/4727,676,292 21,745,644 
U.S. Treasury Inflation Indexed Bonds, 1.00%, 2/15/4826,010,960 21,120,860 
U.S. Treasury Inflation Indexed Bonds, 1.00%, 2/15/496,946,483 5,667,952 
U.S. Treasury Inflation Indexed Bonds, 0.25%, 2/15/5047,454,597 31,178,003 
U.S. Treasury Inflation Indexed Bonds, 0.125%, 2/15/5149,102,974 30,895,018 
U.S. Treasury Inflation Indexed Bonds, 0.125%, 2/15/5268,486,418 43,407,105 
U.S. Treasury Inflation Indexed Notes, 0.125%, 1/15/23127,840,584 126,565,719 
U.S. Treasury Inflation Indexed Notes, 0.625%, 4/15/2337,929,450 37,362,465 
U.S. Treasury Inflation Indexed Notes, 0.375%, 7/15/231,000 984 
U.S. Treasury Inflation Indexed Notes, 0.625%, 1/15/2497,960,441 95,671,484 
U.S. Treasury Inflation Indexed Notes, 0.50%, 4/15/2412,921,700 12,557,819 
U.S. Treasury Inflation Indexed Notes, 0.125%, 7/15/2452,654,206 50,861,411 
U.S. Treasury Inflation Indexed Notes, 0.125%, 10/15/2412,124,875 11,661,959 
U.S. Treasury Inflation Indexed Notes, 0.125%, 4/15/2512,330,143 11,698,380 
U.S. Treasury Inflation Indexed Notes, 0.375%, 7/15/2575,483,914 72,152,633 
U.S. Treasury Inflation Indexed Notes, 0.125%, 10/15/25182,691,200 172,630,708 
U.S. Treasury Inflation Indexed Notes, 0.625%, 1/15/26186,647,711 178,211,176 
U.S. Treasury Inflation Indexed Notes, 0.125%, 4/15/26(1)
92,655,116 86,556,874 
U.S. Treasury Inflation Indexed Notes, 0.125%, 7/15/2622,834,915 21,355,360 
U.S. Treasury Inflation Indexed Notes, 0.125%, 10/15/26(1)
24,936,830 23,238,017 
U.S. Treasury Inflation Indexed Notes, 0.375%, 1/15/2753,658,938 50,144,006 
U.S. Treasury Inflation Indexed Notes, 0.125%, 4/15/27131,163,750 120,987,837 
U.S. Treasury Inflation Indexed Notes, 0.375%, 7/15/2739,967,950 37,306,772 
U.S. Treasury Inflation Indexed Notes, 0.50%, 1/15/28100,832,345 93,626,508 
U.S. Treasury Inflation Indexed Notes, 0.75%, 7/15/282,183,518 2,052,998 
U.S. Treasury Inflation Indexed Notes, 0.875%, 1/15/2939,893,220 37,536,414 
U.S. Treasury Inflation Indexed Notes, 0.25%, 7/15/29100,071,936 90,293,026 
U.S. Treasury Inflation Indexed Notes, 0.125%, 1/15/3060,512,902 53,535,647 
U.S. Treasury Inflation Indexed Notes, 0.125%, 7/15/3087,243,270 76,869,722 
U.S. Treasury Inflation Indexed Notes, 0.125%, 1/15/3199,129,381 86,668,621 
U.S. Treasury Inflation Indexed Notes, 0.125%, 7/15/3182,352,300 71,865,560 
U.S. Treasury Inflation Indexed Notes, 0.125%, 1/15/3280,724,953 69,849,998 
6


Principal AmountValue
U.S. Treasury Inflation Indexed Notes, 0.625%, 7/15/32$85,653,960 $77,787,436 
TOTAL U.S. TREASURY SECURITIES
(Cost $2,936,538,823)
2,598,630,665 
CORPORATE BONDS — 2.0%
Airlines
British Airways Pass Through Trust, Series 2021-1, Class A, 2.90%, 9/15/36(2)
724,683 590,960 
Banks — 0.4%
Bank of America Corp., VRN, 3.42%, 12/20/284,320,000 3,841,410 
Bank of America Corp., VRN, 2.48%, 9/21/361,250,000 904,743 
Bank of Ireland Group PLC, VRN, 2.03%, 9/30/27(2)
1,880,000 1,557,380 
Citigroup, Inc., VRN, 3.07%, 2/24/281,324,000 1,181,550 
Citigroup, Inc., VRN, 3.52%, 10/27/281,457,000 1,302,459 
JPMorgan Chase & Co., VRN, 1.58%, 4/22/272,475,000 2,139,470 
PNC Financial Services Group, Inc., VRN, 4.63%, 6/6/332,400,000 2,144,122 
13,071,134 
Capital Markets — 0.1%
FS KKR Capital Corp., 4.25%, 2/14/25(2)
966,000 897,011 
Morgan Stanley, VRN, 2.48%, 9/16/361,310,000 940,631 
1,837,642 
Consumer Finance — 0.1%
AerCap Ireland Capital DAC / AerCap Global Aviation Trust, 1.65%, 10/29/24925,000 845,890 
AerCap Ireland Capital DAC / AerCap Global Aviation Trust, 3.00%, 10/29/282,361,000 1,895,539 
2,741,429 
Diversified Financial Services — 0.2%
Corebridge Financial, Inc., 3.85%, 4/5/29(2)
1,030,000 909,056 
PG&E Energy Recovery Funding LLC, 2.82%, 7/15/486,700,000 4,581,335 
5,490,391 
Electric Utilities — 0.2%
Duke Energy Florida LLC, 1.75%, 6/15/302,940,000 2,295,543 
Duke Energy Progress LLC, 2.00%, 8/15/315,000,000 3,871,873 
6,167,416 
Equity Real Estate Investment Trusts (REITs) — 0.1%
Broadstone Net Lease LLC, 2.60%, 9/15/311,377,000 1,015,697 
Phillips Edison Grocery Center Operating Partnership I LP, 2.625%, 11/15/311,794,000 1,305,013 
2,320,710 
Insurance — 0.2%
Athene Global Funding, 1.99%, 8/19/28(2)
3,871,000 3,056,144 
SBL Holdings, Inc., 5.125%, 11/13/26(2)
2,626,000 2,398,111 
5,454,255 
Media — 0.1%
Charter Communications Operating LLC / Charter Communications Operating Capital, 5.125%, 7/1/49940,000 691,406 
Paramount Global, 4.95%, 1/15/311,705,000 1,506,715 
Paramount Global, 4.375%, 3/15/431,390,000 929,163 
3,127,284 
Pharmaceuticals
Viatris, Inc., 4.00%, 6/22/50666,000 400,077 
Road and Rail
DAE Funding LLC, 1.55%, 8/1/24(2)
1,304,000 1,192,392 
7


Principal AmountValue
Semiconductors and Semiconductor Equipment — 0.1%
Qorvo, Inc., 4.375%, 10/15/29$1,610,000 $1,381,404 
Software — 0.1%
Oracle Corp., 3.60%, 4/1/403,260,000 2,218,475 
Specialty Retail — 0.1%
Lowe's Cos., Inc., 2.625%, 4/1/315,000,000 4,027,750 
Technology Hardware, Storage and Peripherals
Dell International LLC / EMC Corp., 8.10%, 7/15/361,133,000 1,201,199 
Wireless Telecommunication Services — 0.3%
Millicom International Cellular SA, 5.125%, 1/15/28(2)
2,970,000 2,479,319 
T-Mobile USA, Inc., 3.375%, 4/15/297,075,000 6,123,413 
8,602,732 
TOTAL CORPORATE BONDS
(Cost $74,893,514)
59,825,250 
COLLATERALIZED LOAN OBLIGATIONS — 2.0%
BlueMountain CLO Ltd., Series 2016-2A, Class BR2, VRN, 5.23%, (3-month LIBOR plus 2.25%), 8/20/32(2)
3,125,000 2,876,693 
Dryden CLO Ltd., Series 2019-72A, Class CR, VRN, 4.76%, (3-month LIBOR plus 1.85%), 5/15/32(2)
8,450,000 7,692,274 
Dryden Senior Loan Fund, Series 2016-43A, Class B2R2, 3.09%, 4/20/34(2)
5,000,000 4,209,631 
Elmwood CLO IV Ltd., Series 2020-1A, Class B, VRN, 4.21%, (3-month LIBOR plus 1.70%), 4/15/33(2)
9,500,000 9,077,072 
Marathon CLO Ltd., Series 2021-17A, Class B1, VRN, 5.39%, (3-month LIBOR plus 2.68%), 1/20/35(2)
7,575,000 6,918,717 
MF1 Ltd., Series 2021-FL7, Class AS, VRN, 4.44%, (1-month LIBOR plus 1.45%), 10/16/36(2)
4,023,000 3,851,277 
Rockford Tower CLO Ltd., Series 2020-1A, Class B, VRN, 4.51%, (3-month LIBOR plus 1.80%), 1/20/32(2)
10,000,000 9,394,937 
Shelter Growth Issuer Ltd., Series 2022-FL4, Class A, VRN, 5.32%, (1-month SOFR plus 2.30%), 6/17/37(2)
9,072,000 8,973,547 
THL Credit Wind River CLO Ltd., Series 2019-3A, Class CR, VRN, 4.71%, (3-month LIBOR plus 2.20%), 4/15/31(2)
6,050,000 5,562,051 
TOTAL COLLATERALIZED LOAN OBLIGATIONS
(Cost $62,665,953)
58,556,199 
ASSET-BACKED SECURITIES — 1.7%
Blackbird Capital Aircraft, Series 2021-1A, Class A SEQ, 2.44%, 7/15/46(2)
6,247,779 5,054,866 
BRE Grand Islander Timeshare Issuer LLC, Series 2017-1A, Class A SEQ, 2.94%, 5/25/29(2)
1,216,192 1,174,907 
Cologix Canadian Issuer LP, Series 2022-1CAN, Class A2 SEQ, 4.94%, 1/25/52(2)
CAD14,050,000 9,398,279 
FirstKey Homes Trust, Series 2020-SFR2, Class D, 1.97%, 10/19/37(2)
$7,100,000 6,322,614 
Global SC Finance VII Srl, Series 2021-2A, Class A SEQ, 1.95%, 8/17/41(2)
4,637,814 4,014,056 
Goodgreen Trust, Series 2020-1A, Class A SEQ, 2.63%, 4/15/55(2)
5,528,472 4,477,327 
Goodgreen Trust, Series 2021-1A, Class A SEQ, 2.66%, 10/15/56(2)
3,691,183 3,239,239 
Mosaic Solar Loan Trust, Series 2020-1A, Class A SEQ, 2.10%, 4/20/46(2)
2,192,960 1,894,469 
Mosaic Solar Loan Trust, Series 2021-1A, Class A SEQ, 1.51%, 12/20/46(2)
8,854,999 6,923,113 
Progress Residential Trust, Series 2020-SFR1, Class B, 2.03%, 4/17/37(2)
7,347,000 6,794,150 
TOTAL ASSET-BACKED SECURITIES
(Cost $57,779,062)
49,293,020 
8


Principal AmountValue
COMMERCIAL MORTGAGE-BACKED SECURITIES — 0.9%
BX Commercial Mortgage Trust, Series 2020-VIV2, Class C, VRN, 3.66%, 3/9/44(2)
$7,950,000 $6,302,223 
BX Commercial Mortgage Trust, Series 2020-VIVA, Class D, VRN, 3.67%, 3/11/44(2)
6,409,000 4,801,323 
BX Commercial Mortgage Trust, Series 2021-VOLT, Class E, VRN, 4.82%, (1-month LIBOR plus 2.00%), 9/15/36(2)
9,200,000 8,512,858 
OPG Trust, Series 2021-PORT, Class E, VRN, 4.35%, (1-month LIBOR plus 1.53%), 10/15/36(2)
8,286,173 7,504,449 
TOTAL COMMERCIAL MORTGAGE-BACKED SECURITIES
(Cost $32,342,801)
27,120,853 
COLLATERALIZED MORTGAGE OBLIGATIONS — 0.7%


Private Sponsor Collateralized Mortgage Obligations — 0.7%
ABN Amro Mortgage Corp., Series 2003-4, Class A4, 5.50%, 3/25/3388,229 78,094 
Angel Oak Mortgage Trust, Series 2019-4, Class A3 SEQ, VRN, 3.30%, 7/26/49(2)
227,183 225,762 
Arroyo Mortgage Trust, Series 2021-1R, Class A2, VRN, 1.48%, 10/25/48(2)
2,748,193 2,381,573 
Arroyo Mortgage Trust, Series 2021-1R, Class A3, VRN, 1.64%, 10/25/48(2)
2,189,967 1,904,288 
Bellemeade Re Ltd., Series 2021-3A, Class M1A, VRN, 3.28%, (30-day average SOFR plus 1.00%), 9/25/31(2)
4,266,285 4,205,678 
Cendant Mortgage Capital LLC, Series 2003-6, Class A3, 5.25%, 7/25/33485,367 456,462 
Credit Suisse Mortgage Trust, Series 2015-WIN1, Class A10, VRN, 3.50%, 12/25/44(2)
1,107,057 1,008,272 
Credit Suisse Mortgage Trust, Series 2021-NQM6, Class A3 SEQ, VRN, 1.59%, 7/25/66(2)
6,687,291 5,261,920 
Imperial Fund Mortgage Trust, Series 2021-NQM1, Class A3 SEQ, VRN, 1.62%, 6/25/56(2)
2,814,779 2,353,985 
MASTR Adjustable Rate Mortgages Trust, Series 2004-13, Class 3A7, VRN, 3.82%, 11/21/3422,768 21,618 
Verus Securitization Trust, Series 2021-5, Class A3, VRN, 1.37%, 9/25/66(2)
3,112,211 2,531,192 
WaMu Mortgage Pass-Through Certificates Trust, Series 2003-S11, Class 3A5, 5.95%, 11/25/33339,748 328,152 
20,756,996 
U.S. Government Agency Collateralized Mortgage Obligations
FNMA, Series 2014-C02, Class 2M2, VRN, 5.68%, (1-month LIBOR plus 2.60%), 5/25/24255,581 255,008 
TOTAL COLLATERALIZED MORTGAGE OBLIGATIONS
(Cost $24,357,922)
21,012,004 
SHORT-TERM INVESTMENTS — 4.8%
Discount Notes(3) — 2.5%
Federal Home Loan Bank Discount Notes, 2.60%, 10/3/2255,000,000 55,000,000 
Federal Home Loan Bank Discount Notes, 2.42%, 10/11/2220,000,000 19,986,587 
74,986,587 
Repurchase Agreements — 2.3%
BMO Capital Markets Corp., (collateralized by various U.S. Treasury obligations, 0.625% - 4.625%, 1/15/25 - 5/15/47, valued at $11,444,839), in a joint trading account at 2.86%, dated 9/30/22, due 10/3/22 (Delivery value $11,252,980)11,250,299 
9


Principal AmountValue
Fixed Income Clearing Corp., (collateralized by various U.S. Treasury obligations, 1.00%, 7/31/28, valued at $57,410,710), at 2.95%, dated 9/30/22, due 10/3/22 (Delivery value $56,298,837)$56,285,000 
67,535,299 
TOTAL SHORT-TERM INVESTMENTS
(Cost $142,514,354)
142,521,886 
TOTAL INVESTMENT SECURITIES — 100.0%
(Cost $3,331,092,429)
2,956,959,877 
OTHER ASSETS AND LIABILITIES
(735,655)
TOTAL NET ASSETS — 100.0%
$2,956,224,222 

FORWARD FOREIGN CURRENCY EXCHANGE CONTRACTS
Currency PurchasedCurrency SoldCounterpartySettlement DateUnrealized Appreciation
(Depreciation)
USD10,031,501 CAD13,081,830 Goldman Sachs & Co.12/15/22$558,939 

FUTURES CONTRACTS PURCHASED
Reference EntityContractsExpiration DateNotional AmountUnrealized Appreciation (Depreciation)^
U.S. Treasury 10-Year Notes219December 2022$24,541,687 $(168,940)
U.S. Treasury 10-Year Ultra Notes760December 202290,048,125 (1,544,838)
U.S. Treasury 5-Year Notes1,934December 2022207,920,110 (3,371,234)
U.S. Treasury Long Bonds146December 202218,455,313 (1,455,835)
U.S. Treasury Ultra Bonds92December 202212,604,000 (1,176,047)
$353,569,235 $(7,716,894)
^Amount represents value and unrealized appreciation (depreciation).

CENTRALLY CLEARED TOTAL RETURN SWAP AGREEMENTS
Floating Rate Index
Pay/Receive Floating
Rate Index
at Termination
Fixed
Rate
Termination
Date
Notional
Amount
Premiums Paid (Received)
Unrealized
Appreciation
(Depreciation)
Value
CPURNSAReceive2.29%1/25/24$50,000,000 $670 $4,676,704 $4,677,374 
CPURNSAReceive2.27%1/26/24$35,000,000 619 3,293,736 3,294,355 
CPURNSAReceive1.45%3/5/25$39,000,000 (738)4,958,720 4,957,982 
CPURNSAReceive1.08%6/4/25$4,000,000 524 612,581 613,105 
CPURNSAReceive1.85%8/26/25$14,000,000 586 1,757,120 1,757,706 
CPURNSAReceive2.24%1/12/26$50,000,000 805 4,898,618 4,899,423 
CPURNSAReceive2.22%1/19/26$50,000,000 805 4,931,773 4,932,578 
CPURNSAReceive2.29%2/2/26$25,000,000 403 2,387,335 2,387,738 
CPURNSAReceive1.86%6/20/29$25,000,000 (775)3,129,573 3,128,798 
CPURNSAReceive1.80%10/21/29$24,500,000 (765)3,210,889 3,210,124 
CPURNSAReceive1.88%11/21/29$22,000,000 (738)2,731,563 2,730,825 
CPURNSAReceive1.87%11/25/29$4,000,000 (543)501,201 500,658 
CPURNSAReceive1.29%5/19/30$4,500,000 549 799,756 800,305 
$1,402 $37,889,569 $37,890,971 

10


TOTAL RETURN SWAP AGREEMENTS
CounterpartyFloating Rate
Index
Pay/Receive
Floating Rate
Index at Termination
Fixed RateTermination
Date
Notional
Amount
Value*
Bank of America N.A.(4)
CPURNSAReceive2.53%8/19/24$11,000,000 $211,816 
Barclays Bank PLCCPURNSAReceive2.59%7/23/24$16,300,000 200,645 
Barclays Bank PLCCPURNSAReceive2.36%9/29/24$10,000,000 398,093 
Barclays Bank PLCCPURNSAReceive2.31%9/30/24$15,000,000 688,454 
Barclays Bank PLCCPURNSAReceive2.90%12/21/27$19,200,000 (2,592,670)
Barclays Bank PLCCPURNSAReceive2.78%7/2/44$15,000,000 (1,944,978)
$(3,038,640)
*Amount represents value and unrealized appreciation (depreciation).

NOTES TO SCHEDULE OF INVESTMENTS
CAD-Canadian Dollar
CPURNSA-U.S. Consumer Price Index Urban Consumers Not Seasonally Adjusted Index
FNMA-Federal National Mortgage Association
LIBOR-London Interbank Offered Rate
SEQ-Sequential Payer
SOFR-Secured Overnight Financing Rate
USD-United States Dollar
VRN-Variable Rate Note. The rate adjusts periodically based upon the terms set forth in the security’s offering documents. The rate shown is effective at the period end and the reference rate and spread, if any, is indicated. The security's effective maturity date may be shorter than the final maturity date shown.
Category is less than 0.05% of total net assets.
(1)Security, or a portion thereof, has been pledged at the custodian bank or with a broker for collateral requirements on forward foreign currency exchange contracts, futures contracts and/or swap agreements. At the period end, the aggregate value of securities pledged was $22,318,800.
(2)Security was purchased pursuant to Rule 144A or Section 4(2) under the Securities Act of 1933 and may be sold in transactions exempt from registration, normally to qualified institutional investors. The aggregate value of these securities at the period end was $167,923,115, which represented 5.7% of total net assets.
(3)The rate indicated is the yield to maturity at purchase for non-interest bearing securities. For interest bearing securities, the stated coupon rate is shown.
(4)Collateral has been received at the custodian for collateral requirements on swap agreements. At the period end, the aggregate value of securities received was $260,143.


See Notes to Financial Statements.

11


Statement of Assets and Liabilities
SEPTEMBER 30, 2022 (UNAUDITED)
Assets
Investment securities, at value (cost of $3,331,092,429)$2,956,959,877 
Receivable for investments sold716,044 
Receivable for capital shares sold1,692,283 
Unrealized appreciation on forward foreign currency exchange contracts558,939 
Swap agreements, at value1,499,008 
Interest receivable6,249,149 
2,967,675,300 
Liabilities
Disbursements in excess of demand deposit cash64,867 
Payable for capital shares redeemed3,933,370 
Payable for variation margin on futures contracts1,308,911 
Payable for variation margin on swap agreements882,018 
Swap agreements, at value4,537,648 
Accrued management fees677,275 
Distribution and service fees payable46,989 
11,451,078 
Net Assets$2,956,224,222 
Net Assets Consist of:
Capital paid in$3,165,405,106 
Distributable earnings(209,180,884)
$2,956,224,222 

Net AssetsShares OutstandingNet Asset Value Per Share*
Investor Class$833,805,03176,806,964$10.86
I Class$397,099,56536,627,769$10.84
Y Class$50,478,4604,654,425$10.85
A Class$108,671,76010,041,687$10.82
C Class$9,117,137844,797$10.79
R Class$35,998,9513,312,167$10.87
R5 Class$231,840,86521,375,029$10.85
R6 Class$512,797,43047,299,562$10.84
G Class$776,415,02371,525,512$10.86
*Maximum offering price per share was equal to the net asset value per share for all share classes, except Class A, for which the maximum offering price per share was $11.33 (net asset value divided by 0.955). A contingent deferred sales charge may be imposed on redemptions of Class A and Class C.


See Notes to Financial Statements.

12


Statement of Operations
FOR THE SIX MONTHS ENDED SEPTEMBER 30, 2022 (UNAUDITED)
Investment Income (Loss)
Income:
Interest$156,176,230 
Expenses:
Management fees5,302,808 
Distribution and service fees:
A Class152,467 
C Class57,846 
R Class99,572 
Trustees' fees and expenses115,111 
Interest expenses466,105 
Other expenses492 
6,194,401 
Fees waived - G Class(892,374)
5,302,027 
Net investment income (loss)150,874,203 
Realized and Unrealized Gain (Loss)
Net realized gain (loss) on:
Investment transactions(30,119,695)
Forward foreign currency exchange contract transactions217,566 
Futures contract transactions(14,721,291)
Swap agreement transactions34,027,786 
Foreign currency translation transactions(3,881)
(10,599,515)
Change in net unrealized appreciation (depreciation) on:
Investments(490,663,044)
Forward foreign currency exchange contracts794,359 
Futures contracts(3,649,354)
Swap agreements(45,476,940)
Translation of assets and liabilities in foreign currencies(114)
(538,995,093)
Net realized and unrealized gain (loss)(549,594,608)
Net Increase (Decrease) in Net Assets Resulting from Operations$(398,720,405)


See Notes to Financial Statements.

13


Statement of Changes in Net Assets
SIX MONTHS ENDED SEPTEMBER 30, 2022 (UNAUDITED) AND YEAR ENDED MARCH 31, 2022
Increase (Decrease) in Net AssetsSeptember 30, 2022March 31, 2022
Operations
Net investment income (loss)$150,874,203 $196,187,324 
Net realized gain (loss)(10,599,515)43,889,331 
Change in net unrealized appreciation (depreciation)(538,995,093)(70,766,199)
Net increase (decrease) in net assets resulting from operations(398,720,405)169,310,456 
Distributions to Shareholders
From earnings:
Investor Class(18,180,981)(45,635,092)
I Class(8,863,416)(21,065,243)
Y Class(1,126,197)(2,881,712)
A Class(2,165,409)(6,072,288)
C Class(172,661)(397,630)
R Class(675,979)(1,420,127)
R5 Class(5,332,120)(13,701,223)
R6 Class(10,628,778)(26,557,630)
G Class(17,969,032)(47,793,931)
Decrease in net assets from distributions(65,114,573)(165,524,876)
Capital Share Transactions
Net increase (decrease) in net assets from capital share transactions (Note 5)(126,006,155)222,254,029 
Net increase (decrease) in net assets(589,841,133)226,039,609 
Net Assets
Beginning of period3,546,065,355 3,320,025,746 
End of period$2,956,224,222 $3,546,065,355 


See Notes to Financial Statements.

14


Notes to Financial Statements

SEPTEMBER 30, 2022 (UNAUDITED)

1. Organization

American Century Government Income Trust (the trust) is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company and is organized as a Massachusetts business trust. Inflation-Adjusted Bond Fund (the fund) is one fund in a series issued by the trust. The fund’s investment objective is to seek to provide total return and inflation protection consistent with investment in inflation-indexed securities.

The fund offers the Investor Class, I Class, Y Class, A Class, C Class, R Class, R5 Class, R6 Class and G Class. The A Class may incur an initial sales charge. The A Class and C Class may be subject to a contingent deferred sales charge.

2. Significant Accounting Policies

The following is a summary of significant accounting policies consistently followed by the fund in preparation of its financial statements. The fund is an investment company and follows accounting and reporting guidance in accordance with accounting principles generally accepted in the United States of America. This may require management to make certain estimates and assumptions at the date of the financial statements. Actual results could differ from these estimates. Management evaluated the impact of events or transactions occurring through the date the financial statements were issued that would merit recognition or disclosure.

Investment Valuations — The fund determines the fair value of its investments and computes its net asset value (NAV) per share at the close of regular trading (usually 4 p.m. Eastern time) on the New York Stock Exchange (NYSE) on each day the NYSE is open. The value of investments of the fund is determined by American Century Investment Management, Inc. (ACIM) (the investment advisor), as the valuation designee, pursuant to its valuation policies and procedures. The Board of Trustees oversees the valuation designee and reviews its valuation policies and procedures at least annually.

Fixed income securities are valued at the evaluated mean as provided by independent pricing services or at the mean of the most recent bid and asked prices as provided by investment dealers. Corporate bonds, U.S. Treasury and Government Agency securities, convertible bonds, municipal securities, and sovereign governments and agencies are valued using market models that consider trade data, quotations from dealers and active market makers, relevant yield curve and spread data, creditworthiness, trade data or market information on comparable securities, and other relevant security specific information. Mortgage-related and asset-backed securities are valued based on models that consider trade data, prepayment and default projections, benchmark yield and spread data and estimated cash flows of each tranche of the issuer. Collateralized loan obligations are valued based on discounted cash flow models that consider trade and economic data, prepayment assumptions and default projections. Commercial paper is valued using a curve-based approach that considers money market rates for specific instruments, programs, currencies and maturity points from a variety of active market makers. Fixed income securities initially expressed in local currencies are translated into U.S. dollars at the mean of the appropriate currency exchange rate at the close of the NYSE as provided by an independent pricing service.

Open-end management investment companies are valued at the reported NAV per share. Repurchase agreements are valued at cost, which approximates fair value. Exchange-traded futures contracts are valued at the settlement price as provided by the appropriate exchange. Swap agreements are valued at an evaluated mean as provided by independent pricing services or independent brokers. Forward foreign currency exchange contracts are valued at the mean of the appropriate forward exchange rate at the close of the NYSE as provided by an independent pricing service.

If the valuation designee determines that the market price for a portfolio security is not readily available or is believed by the valuation designee to be unreliable, such security is valued at fair value as determined in good faith by the valuation designee, in accordance with its policies and procedures. Circumstances that may cause the fund to determine that market quotations are not available or reliable include, but are not limited to: when there is a significant event subsequent to the market quotation; trading in a security has been halted during the trading day; or trading in a security is insufficient or did not take place due to a closure or holiday.

15


The valuation designee monitors for significant events occurring after the close of an investment’s primary exchange but before the fund’s NAV per share is determined. Significant events may include, but are not limited to: corporate announcements and transactions; regulatory news, governmental action and political unrest that could impact a specific investment or an investment sector; or armed conflicts, natural disasters and similar events that could affect investments in a specific country or region.

Security Transactions — Security transactions are accounted for as of the trade date. Net realized gains and losses are determined on the identified cost basis, which is also used for federal income tax purposes.

Investment Income — Interest income is recorded on the accrual basis and includes paydown gain (loss) and accretion of discounts and amortization of premiums. Inflation adjustments related to inflation-linked debt securities are reflected as interest income.

Foreign Currency Translations — All assets and liabilities initially expressed in foreign currencies are translated into U.S. dollars at prevailing exchange rates at period end. The fund may enter into spot foreign currency exchange contracts to facilitate transactions denominated in a foreign currency. Purchases and sales of investment securities, dividend and interest income, spot foreign currency exchange contracts, and expenses are translated at the rates of exchange prevailing on the respective dates of such transactions. Net realized and unrealized foreign currency exchange gains or losses related to investment securities are a component of net realized gain (loss) on investment transactions and change in net unrealized appreciation (depreciation) on investments, respectively.

Repurchase Agreements — The fund may enter into repurchase agreements with institutions that ACIM has determined are creditworthy pursuant to criteria adopted by the Board of Trustees. The fund requires that the collateral, represented by securities, received in a repurchase transaction be transferred to the custodian in a manner sufficient to enable the fund to obtain those securities in the event of a default under the repurchase agreement. ACIM monitors, on a daily basis, the securities transferred to ensure the value, including accrued interest, of the securities under each repurchase agreement is equal to or greater than amounts owed to the fund under each repurchase agreement.

Joint Trading Account — Pursuant to an Exemptive Order issued by the Securities and Exchange Commission, the fund, along with certain other funds in the American Century Investments family of funds, may transfer uninvested cash balances into a joint trading account. These balances are invested in one or more repurchase agreements that are collateralized by U.S. Treasury or Agency obligations.

Segregated Assets — In accordance with the 1940 Act, the fund segregates assets on its books and records to cover certain types of investment securities and other financial instruments. ACIM monitors, on a daily basis, the securities segregated to ensure the fund designates a sufficient amount of liquid assets, marked-to-market daily. The fund may also receive assets or be required to pledge assets at the custodian bank or with a broker for collateral requirements. The fund may incur charges or earn income on posted collateral balances, which are reflected in interest expenses or interest income, respectively.

Income Tax Status — It is the fund’s policy to distribute substantially all net investment income and net realized gains to shareholders and to otherwise qualify as a regulated investment company under provisions of the Internal Revenue Code. Accordingly, no provision has been made for income taxes. The fund files U.S. federal, state, local and non-U.S. tax returns as applicable. The fund's tax returns are subject to examination by the relevant taxing authority until expiration of the applicable statute of limitations, which is generally three years from the date of filing but can be longer in certain jurisdictions. At this time, management believes there are no uncertain tax positions which, based on their technical merit, would not be sustained upon examination and for which it is reasonably possible that the total amounts of unrecognized tax benefits will significantly change in the next twelve months.

Multiple Class — All shares of the fund represent an equal pro rata interest in the net assets of the class to which such shares belong, and have identical voting, dividend, liquidation and other rights and the same terms and conditions, except for class specific expenses and exclusive rights to vote on matters affecting only individual classes. Income, non-class specific expenses, and realized and unrealized capital gains and losses of the fund are allocated to each class of shares based on their relative net assets.

Distributions to Shareholders — Distributions from net investment income, if any, are generally declared and paid quarterly, but may be paid less frequently. Distributions from net realized gains, if any, are generally declared and paid annually. The fund may elect to treat a portion of its payment to a redeeming shareholder, which represents the pro rata share of undistributed net investment income and net realized gains, as a distribution for federal income tax purposes (tax equalization).
16


Indemnifications — Under the trust’s organizational documents, its officers and trustees are indemnified against certain liabilities arising out of the performance of their duties to the fund. In addition, in the normal course of business, the fund enters into contracts that provide general indemnifications. The maximum exposure under these arrangements is unknown as this would involve future claims that may be made against a fund. The risk of material loss from such claims is considered by management to be remote.

3. Fees and Transactions with Related Parties

Certain officers and trustees of the trust are also officers and/or directors of American Century Companies, Inc. (ACC). The trust's investment advisor, ACIM, the trust's distributor, American Century Investment Services, Inc. (ACIS), and the trust's transfer agent, American Century Services, LLC, are wholly owned, directly or indirectly, by ACC. Various funds issued by American Century Asset Allocation Portfolios, Inc. own, in aggregate, 22% of the shares of the fund.

Management Fees — The trust has entered into a management agreement with ACIM, under which ACIM provides the fund with investment advisory and management services in exchange for a single, unified management fee (the fee) per class. The agreement provides that ACIM will pay all expenses of managing and operating the fund, except brokerage expenses, taxes, interest, fees and expenses of the independent trustees (including legal counsel fees), extraordinary expenses, and expenses incurred in connection with the provision of shareholder services and distribution services under a plan adopted pursuant to Rule 12b-1 under the 1940 Act. The fee is computed and accrued daily based on each class’s daily net assets and paid monthly in arrears. The difference in the fee among the classes is a result of their separate arrangements for non-Rule 12b-1 shareholder services. It is not the result of any difference in advisory or custodial fees or other expenses related to the management of the fund’s assets, which do not vary by class. The fee consists of (1) an Investment Category Fee based on the daily net assets of the fund and certain other accounts managed by the investment advisor that are in the same broad investment category as the fund and (2) a Complex Fee based on the assets of all funds in the American Century Investments family of funds that have the same investment advisor and distributor as the fund. For purposes of determining the Investment Category Fee and Complex Fee, the assets of funds managed by the investment advisor that invest exclusively in the shares of other funds (funds of funds) are not included. The investment advisor agreed to waive the G Class's management fee in its entirety. The investment advisor expects this waiver to remain in effect permanently and cannot terminate it without the approval of the Board of Trustees.

The Investment Category Fee range, the Complex Fee range and the effective annual management fee for each class for the period ended September 30, 2022 are as follows:
Investment Category
Fee Range
Complex
Fee Range
Effective Annual Management Fee
Investor Class
0.1625%
to 0.2800%
0.2500% to 0.3100%0.46%
I Class0.1500% to 0.2100%0.36%
Y Class0.0500% to 0.1100%0.26%
A Class0.2500% to 0.3100%0.46%
C Class0.2500% to 0.3100%0.46%
R Class0.2500% to 0.3100%0.46%
R5 Class0.0500% to 0.1100%0.26%
R6 Class0.0000% to 0.0600%0.21%
G Class0.0000% to 0.0600%
0.00%(1)
(1)Effective annual management fee before waiver was 0.21%.

Distribution and Service Fees — The Board of Trustees has adopted a separate Master Distribution and Individual Shareholder Services Plan for each of the A Class, C Class and R Class (collectively the plans), pursuant to Rule 12b-1 of the 1940 Act. The plans provide that the A Class will pay ACIS an annual distribution and service fee of 0.25%. The plans provide that the C Class will pay ACIS an annual distribution and service fee of 1.00%, of which 0.25% is paid for individual shareholder services and 0.75% is paid for distribution services. The plans provide that the R Class will pay ACIS an annual distribution and service fee of 0.50%. The fees are computed and accrued daily based on each class’s daily net assets and paid monthly in arrears. The fees are used to pay financial intermediaries for distribution and individual shareholder services. Fees incurred under the plans during the period ended September 30, 2022 are detailed in the Statement of Operations.

17


Trustees’ Fees and Expenses — The Board of Trustees is responsible for overseeing the investment advisor’s management and operations of the fund. The trustees receive detailed information about the fund and its investment advisor regularly throughout the year, and meet at least quarterly with management of the investment advisor to review reports about fund operations. The fund’s officers do not receive compensation from the fund.

Interfund Transactions — The fund may enter into security transactions with other American Century Investments funds and other client accounts of the investment advisor, in accordance with the 1940 Act rules and procedures adopted by the Board of Trustees. The rules and procedures require, among other things, that these transactions be effected at the independent current market price of the security. There were no interfund transactions during the period.

4. Investment Transactions

Purchases of investment securities, excluding short-term investments, for the period ended September 30, 2022 totaled $361,476,218, of which $337,001,280 represented U.S. Treasury and Government Agency obligations.

Sales of investment securities, excluding short-term investments, for the period ended September 30, 2022 totaled $451,608,908, of which $327,608,478 represented U.S. Treasury and Government Agency obligations.

18


5. Capital Share Transactions

Transactions in shares of the fund were as follows (unlimited number of shares authorized):
Six months ended
September 30, 2022
Year ended
March 31, 2022
SharesAmountSharesAmount
Investor Class
Sold3,982,749 $47,624,754 19,585,072 $252,068,972 
Issued in reinvestment of distributions1,537,752 17,761,050 3,498,506 44,555,754 
Redeemed(12,788,540)(150,458,653)(16,314,387)(209,594,393)
(7,268,039)(85,072,849)6,769,191 87,030,333 
I Class
Sold6,884,004 81,480,565 19,067,651 244,587,613 
Issued in reinvestment of distributions637,906 7,361,437 1,407,426 17,897,701 
Redeemed(10,652,144)(125,721,857)(11,215,036)(143,319,900)
(3,130,234)(36,879,855)9,260,041 119,165,414 
Y Class
Sold223,806 2,650,274 1,297,999 16,677,883 
Issued in reinvestment of distributions97,591 1,126,197 226,617 2,881,575 
Redeemed(750,651)(8,873,245)(669,595)(8,595,475)
(429,254)(5,096,774)855,021 10,963,983 
A Class
Sold1,377,122 16,260,758 4,876,457 62,752,360 
Issued in reinvestment of distributions107,660 1,241,324 276,472 3,512,709 
Redeemed(1,851,121)(21,824,991)(7,243,540)(93,423,971)
(366,339)(4,322,909)(2,090,611)(27,158,902)
C Class
Sold81,220 967,151 611,499 7,872,052 
Issued in reinvestment of distributions7,791 89,759 15,529 197,232 
Redeemed(287,232)(3,370,190)(203,507)(2,600,349)
(198,221)(2,313,280)423,521 5,468,935 
R Class
Sold837,183 10,011,546 1,780,579 22,894,277 
Issued in reinvestment of distributions58,094 672,731 110,014 1,404,763 
Redeemed(863,396)(10,272,269)(880,548)(11,268,348)
31,881 412,008 1,010,045 13,030,692 
R5 Class
Sold2,546,786 30,194,145 8,584,415 110,305,593 
Issued in reinvestment of distributions430,143 4,963,851 1,010,991 12,854,876 
Redeemed(5,076,807)(59,889,938)(10,609,816)(135,438,803)
(2,099,878)(24,731,942)(1,014,410)(12,278,334)
R6 Class
Sold9,793,169 115,534,572 24,205,857 309,841,376 
Issued in reinvestment of distributions737,838 8,507,277 1,700,924 21,624,528 
Redeemed(7,530,744)(89,135,880)(18,035,861)(228,777,016)
3,000,263 34,905,969 7,870,920 102,688,888 
G Class
Sold1,695,333 20,286,588 6,761,789 87,148,657 
Issued in reinvestment of distributions1,557,109 17,969,032 3,759,428 47,793,931 
Redeemed(3,495,230)(41,162,143)(16,289,367)(211,599,568)
(242,788)(2,906,523)(5,768,150)(76,656,980)
Net increase (decrease)(10,702,609)$(126,006,155)17,315,568 $222,254,029 

19


6. Fair Value Measurements

The fund’s investments valuation process is based on several considerations and may use multiple inputs to determine the fair value of the investments held by the fund. In conformity with accounting principles generally accepted in the United States of America, the inputs used to determine a valuation are classified into three broad levels.

Level 1 valuation inputs consist of unadjusted quoted prices in an active market for identical investments.

Level 2 valuation inputs consist of direct or indirect observable market data (including quoted prices for comparable investments, evaluations of subsequent market events, interest rates, prepayment speeds, credit risk, etc.). These inputs also consist of quoted prices for identical investments initially expressed in local currencies that are adjusted through translation into U.S. dollars.

Level 3 valuation inputs consist of unobservable data (including a fund’s own assumptions).

The level classification is based on the lowest level input that is significant to the fair valuation measurement. The valuation inputs are not necessarily an indication of the risks associated with investing in these securities or other financial instruments.

The following is a summary of the level classifications as of period end. The Schedule of Investments provides additional information on the fund’s portfolio holdings.
Level 1Level 2Level 3
Assets
Investment Securities
U.S. Treasury Securities— $2,598,630,665 — 
Corporate Bonds— 59,825,250 — 
Collateralized Loan Obligations— 58,556,199 — 
Asset-Backed Securities— 49,293,020 — 
Commercial Mortgage-Backed Securities— 27,120,853 — 
Collateralized Mortgage Obligations— 21,012,004 — 
Short-Term Investments— 142,521,886 — 
— $2,956,959,877 — 
Other Financial Instruments
Swap Agreements— $39,389,979 — 
Forward Foreign Currency Exchange Contracts— 558,939 — 
— $39,948,918 — 
Liabilities
Other Financial Instruments
Futures Contracts$7,716,894 — — 
Swap Agreements— $4,537,648 — 
$7,716,894 $4,537,648 — 

20


7. Derivative Instruments

Foreign Currency Risk — The fund is subject to foreign currency exchange rate risk in the normal course of pursuing its investment objectives. The value of foreign investments held by a fund may be significantly affected by changes in foreign currency exchange rates. The dollar value of a foreign security generally decreases when the value of the dollar rises against the foreign currency in which the security is denominated and tends to increase when the value of the dollar declines against such foreign currency. A fund may enter into forward foreign currency exchange contracts to reduce a fund's exposure to foreign currency exchange rate fluctuations or to gain exposure to the fluctuations in the value of foreign currencies. The net U.S. dollar value of foreign currency underlying all contractual commitments held by a fund and the resulting unrealized appreciation or depreciation are determined daily. Realized gain or loss is recorded upon settlement of the contract. Net realized and unrealized gains or losses occurring during the holding period of forward foreign currency exchange contracts are a component of net realized gain (loss) on forward foreign currency exchange contract transactions and change in net unrealized appreciation (depreciation) on forward foreign currency exchange contracts, respectively. A fund bears the risk of an unfavorable change in the foreign currency exchange rate underlying the forward contract. Additionally, losses, up to the fair value, may arise if the counterparties do not perform under the contract terms. The fund's average U.S. dollar exposure to foreign currency risk derivative instruments held during the period was $10,918,404.

Interest Rate Risk — The fund is subject to interest rate risk in the normal course of pursuing its investment objectives. The value of bonds generally declines as interest rates rise. A fund may enter into futures contracts based on a bond index or a specific underlying security. A fund may purchase futures contracts to gain exposure to increases in market value or sell futures contracts to protect against a decline in market value. Upon entering into a futures contract, a fund will segregate cash, cash equivalents or other appropriate liquid securities on its records in amounts sufficient to meet requirements. Subsequent payments (variation margin) are made or received daily, in cash, by a fund. The variation margin is equal to the daily change in the contract value and is recorded as unrealized gains and losses. A fund recognizes a realized gain or loss when the futures contract is closed or expires. Net realized and unrealized gains or losses occurring during the holding period of futures contracts are a component of net realized gain (loss) on futures contract transactions and change in net unrealized appreciation (depreciation) on futures contracts, respectively. One of the risks of entering into futures contracts is the possibility that the change in value of the contract may not correlate with the changes in value of the underlying securities. The fund's average notional exposure to interest rate risk derivative instruments held during the period was $170,863,897 futures contracts purchased.

Other Contracts — A fund may enter into total return swap agreements in order to attempt to obtain or preserve a particular return or spread at a lower cost than obtaining a return or spread through purchases and/or sales of instruments in other markets or gain exposure to certain markets in the most economical way possible. A fund will segregate cash, cash equivalents or other appropriate liquid securities on its records in amounts sufficient to meet requirements. Changes in value, including the periodic amounts of interest to be paid or received on swap agreements, are recorded as unrealized appreciation (depreciation) on swap agreements. Upon entering into a centrally cleared swap, a fund is required to deposit cash or securities (initial margin) with a financial intermediary in an amount equal to a certain percentage of the notional amount. Subsequent payments (variation margin) are made or received daily, in cash, by a fund. The variation margin is equal to the daily change in the value and is a component of unrealized gains and losses. Realized gain or loss is recorded upon receipt or payment of a periodic settlement or termination of swap agreements. Net realized and unrealized gains or losses occurring during the holding period of swap agreements are a component of net realized gain (loss) on swap agreement transactions and change in net unrealized appreciation (depreciation) on swap agreements, respectively. The risks of entering into swap agreements include the possible lack of liquidity, failure of the counterparty to meet its obligations, and that there may be unfavorable changes in the underlying investments or instruments, including inflationary risk. The fund's average notional amount held during the period was $589,583,333.
21


Value of Derivative Instruments as of September 30, 2022
Asset DerivativesLiability Derivatives
Type of Risk ExposureLocation on Statement of Assets and LiabilitiesValueLocation on Statement of Assets and LiabilitiesValue
Foreign Currency RiskUnrealized appreciation on forward foreign currency exchange contracts$558,939 Unrealized depreciation on forward foreign currency exchange contracts— 
Interest Rate RiskReceivable for variation margin on futures contracts*— Payable for variation margin on futures contracts*$1,308,911 
Other ContractsReceivable for variation margin on swap agreements*— Payable for variation margin on swap agreements*882,018 
Other ContractsSwap agreements1,499,008 Swap agreements4,537,648 
$2,057,947 $6,728,577 
*Included in the unrealized appreciation (depreciation) on futures contracts or centrally cleared swap agreements, as applicable, as reported in the Schedule of Investments.

Effect of Derivative Instruments on the Statement of Operations for the Six Months Ended September 30, 2022
Net Realized Gain (Loss)Change in Net Unrealized Appreciation (Depreciation)
Type of Risk ExposureLocation on Statement of OperationsValueLocation on Statement of OperationsValue
Foreign Currency RiskNet realized gain (loss) on forward foreign currency exchange contract transactions$217,566 Change in net unrealized appreciation (depreciation) on forward foreign currency exchange contracts$794,359 
Interest Rate RiskNet realized gain (loss) on futures contract transactions(14,721,291)Change in net unrealized appreciation (depreciation) on futures contracts(3,649,354)
Other ContractsNet realized gain (loss) on swap agreement transactions34,027,786 Change in net unrealized appreciation (depreciation) on swap agreements(45,476,940)
$19,524,061 $(48,331,935)

8. Risk Factors

The value of the fund’s shares will go up and down, sometimes rapidly or unpredictably, based on the performance of the securities owned by the fund and other factors generally affecting the securities market. Market risks, including political, regulatory, economic and social developments, can affect the value of the fund’s investments. Natural disasters, public health emergencies, war, terrorism and other unforeseeable events may lead to increased market volatility and may have adverse long-term effects on world economies and markets generally.

The fund may invest in instruments that have variable or floating coupon rates based on the London Interbank Offered Rate (LIBOR). LIBOR is a benchmark interest rate intended to be representative of the rate at which certain major international banks lend to one another over short-terms. Financial institutions have started the process of phasing out LIBOR and the transition process to a replacement rate may lead to increased volatility or illiquidity in markets for instruments that rely on LIBOR. This could result in a change to the value of such instruments or a change in the cost of temporary borrowing for the fund.

There are certain risks involved in investing in foreign securities. These risks include those resulting from political events (such as civil unrest, national elections and imposition of exchange controls), social and economic events (such as labor strikes and rising inflation), and natural disasters. Securities of foreign issuers may be less liquid and more volatile.




22


9. Federal Tax Information

The book-basis character of distributions made during the year from net investment income or net realized gains may differ from their ultimate characterization for federal income tax purposes. These differences reflect the differing character of certain income items and net realized gains and losses for financial statement and tax purposes, and may result in reclassification among certain capital accounts on the financial statements.

As of period end, the components of investments for federal income tax purposes were as follows:
Federal tax cost of investments$3,332,479,979 
Gross tax appreciation of investments$8,367,660 
Gross tax depreciation of investments(383,887,762)
Net tax appreciation (depreciation) of investments$(375,520,102)

The difference between book-basis and tax-basis unrealized appreciation (depreciation) is attributable primarily to the tax deferral of losses on wash sales.

As of March 31, 2022, the fund had accumulated short-term capital losses of $(1,006,228), which represent net capital loss carryovers that may be used to offset future realized capital gains for federal income tax purposes. The capital loss carryovers may be carried forward for an unlimited period. Future capital loss carryover utilization in any given year may be subject to Internal Revenue Code limitations.

23


Financial Highlights
For a Share Outstanding Throughout the Years Ended March 31 (except as noted)
Per-Share DataRatios and Supplemental Data
Income From Investment Operations:Ratio to Average Net Assets of:
Net Asset
Value,
Beginning
of Period
Net
Investment
Income
(Loss)(1)
Net
Realized
and
Unrealized
Gain (Loss)
Total From
Investment
Operations
Distributions From Net
Investment
Income
Net Asset
Value,
End
of Period
Total
Return(2)
Operating
Expenses
Operating
Expenses
(before
expense
waiver)
Net
Investment
Income
(Loss)
Net
Investment
Income
(Loss)
(before
expense
waiver)
Portfolio
Turnover
Rate
Net
Assets,
End of
Period
(in thousands)
Investor Class
2022(3)
$12.530.53(1.98)(1.45)(0.22)$10.86(11.64)%
0.49%(4)
0.49%(4)
8.92%(4)
8.92%(4)
11%$833,805 
2022$12.490.68(0.06)0.62(0.58)$12.534.89%0.46%0.46%5.30%5.30%30%$1,053,464 
2021$11.630.170.841.01(0.15)$12.498.70%0.47%0.47%1.46%1.46%22%$965,896 
2020$11.390.320.200.52(0.28)$11.634.62%0.47%0.47%2.70%2.70%24%$929,682 
2019$11.540.24(0.06)0.18(0.33)$11.391.63%0.47%0.47%2.17%2.17%21%$1,101,609 
2018$11.700.27(0.18)0.09(0.25)$11.540.80%0.47%0.47%2.34%2.34%23%$1,326,980 
I Class
2022(3)
$12.510.54(1.98)(1.44)(0.23)$10.84(11.62)%
0.39%(4)
0.39%(4)
9.02%(4)
9.02%(4)
11%$397,100 
2022$12.480.69(0.07)0.62(0.59)$12.514.92%0.36%0.36%5.40%5.40%30%$497,514 
2021$11.610.200.831.03(0.16)$12.488.91%0.37%0.37%1.56%1.56%22%$380,580 
2020$11.380.310.220.53(0.30)$11.614.64%0.37%0.37%2.80%2.80%24%$203,093 
2019$11.530.29(0.10)0.19(0.34)$11.381.73%0.37%0.37%2.27%2.27%21%$149,791 
2018(5)
$11.690.29(0.19)0.10(0.26)$11.530.87%
0.37%(4)
0.37%(4)
2.55%(4)
2.55%(4)
23%(6)
$293,697 



For a Share Outstanding Throughout the Years Ended March 31 (except as noted)
Per-Share DataRatios and Supplemental Data
Income From Investment Operations:Ratio to Average Net Assets of:
Net Asset
Value,
Beginning
of Period
Net
Investment
Income
(Loss)(1)
Net
Realized
and
Unrealized
Gain (Loss)
Total From
Investment
Operations
Distributions From Net
Investment
Income
Net Asset
Value,
End
of Period
Total
Return(2)
Operating
Expenses
Operating
Expenses
(before
expense
waiver)
Net
Investment
Income
(Loss)
Net
Investment
Income
(Loss)
(before
expense
waiver)
Portfolio
Turnover
Rate
Net
Assets,
End of
Period
(in thousands)
Y Class
2022(3)
$12.520.54(1.97)(1.43)(0.24)$10.85(11.57)%
0.29%(4)
0.29%(4)
9.12%(4)
9.12%(4)
11%$50,478 
2022$12.480.71(0.07)0.64(0.60)$12.525.10%0.26%0.26%5.50%5.50%30%$63,634 
2021$11.620.210.821.03(0.17)$12.488.93%0.27%0.27%1.66%1.66%22%$52,784 
2020$11.380.300.250.55(0.31)$11.624.84%0.27%0.27%2.90%2.90%24%$28,234 
2019$11.530.25(0.05)0.20(0.35)$11.381.83%0.27%0.27%2.37%2.37%21%$13,802 
2018(5)
$11.690.30(0.19)0.11(0.27)$11.530.95%
0.27%(4)
0.27%(4)
2.64%(4)
2.64%(4)
23%(6)
$566 
A Class
2022(3)
$12.490.51(1.97)(1.46)(0.21)$10.82(11.79)%
0.74%(4)
0.74%(4)
8.67%(4)
8.67%(4)
11%$108,672 
2022$12.460.66(0.09)0.57(0.54)$12.494.55%0.71%0.71%5.05%5.05%30%$130,021 
2021$11.590.140.850.99(0.12)$12.468.55%0.72%0.72%1.21%1.21%22%$155,704 
2020$11.360.290.190.48(0.25)$11.594.28%0.72%0.72%2.45%2.45%24%$148,184 
2019$11.500.22(0.06)0.16(0.30)$11.361.46%0.72%0.72%1.92%1.92%21%$153,652 
2018$11.670.24(0.19)0.05(0.22)$11.500.46%0.72%0.72%2.09%2.09%23%$205,059 



For a Share Outstanding Throughout the Years Ended March 31 (except as noted)
Per-Share DataRatios and Supplemental Data
Income From Investment Operations:Ratio to Average Net Assets of:
Net Asset
Value,
Beginning
of Period
Net
Investment
Income
(Loss)(1)
Net
Realized
and
Unrealized
Gain (Loss)
Total From
Investment
Operations
Distributions From Net
Investment
Income
Net Asset
Value,
End
of Period
Total
Return(2)
Operating
Expenses
Operating
Expenses
(before
expense
waiver)
Net
Investment
Income
(Loss)
Net
Investment
Income
(Loss)
(before
expense
waiver)
Portfolio
Turnover
Rate
Net
Assets,
End of
Period
(in thousands)
C Class
2022(3)
$12.460.47(1.97)(1.50)(0.17)$10.79(12.13)%
1.49%(4)
1.49%(4)
7.92%(4)
7.92%(4)
11%$9,117 
2022$12.430.54(0.06)0.48(0.45)$12.463.77%1.46%1.46%4.30%4.30%30%$12,996 
2021$11.600.050.840.89(0.06)$12.437.73%1.47%1.47%0.46%0.46%22%$7,698 
2020$11.360.210.200.41(0.17)$11.603.49%1.47%1.47%1.70%1.70%24%$7,134 
2019$11.510.14(0.07)0.07(0.22)$11.360.70%1.47%1.47%1.17%1.17%21%$11,407 
2018$11.680.16(0.19)(0.03)(0.14)$11.51(0.29)%1.47%1.47%1.34%1.34%23%$14,674 
R Class
2022(3)
$12.550.50(1.98)(1.48)(0.20)$10.87(11.92)%
0.99%(4)
0.99%(4)
8.42%(4)
8.42%(4)
11%$35,999 
2022$12.510.61(0.06)0.55(0.51)$12.554.35%0.96%0.96%4.80%4.80%30%$41,155 
2021$11.650.110.840.95(0.09)$12.518.20%0.97%0.97%0.96%0.96%22%$28,398 
2020$11.410.260.210.47(0.23)$11.654.09%0.97%0.97%2.20%2.20%24%$23,721 
2019$11.550.17(0.04)0.13(0.27)$11.411.20%0.97%0.97%1.67%1.67%21%$26,748 
2018$11.720.22(0.20)0.02(0.19)$11.550.21%0.97%0.97%1.84%1.84%23%$27,016 



For a Share Outstanding Throughout the Years Ended March 31 (except as noted)
Per-Share DataRatios and Supplemental Data
Income From Investment Operations:Ratio to Average Net Assets of:
Net Asset
Value,
Beginning
of Period
Net
Investment
Income
(Loss)(1)
Net
Realized
and
Unrealized
Gain (Loss)
Total From
Investment
Operations
Distributions From Net
Investment
Income
Net Asset
Value,
End
of Period
Total
Return(2)
Operating
Expenses
Operating
Expenses
(before
expense
waiver)
Net
Investment
Income
(Loss)
Net
Investment
Income
(Loss)
(before
expense
waiver)
Portfolio
Turnover
Rate
Net
Assets,
End of
Period
(in thousands)
R5 Class
2022(3)
$12.520.54(1.97)(1.43)(0.24)$10.85(11.57)%
0.29%(4)
0.29%(4)
9.12%(4)
9.12%(4)
11%$231,841 
2022$12.480.71(0.07)0.64(0.60)$12.525.10%0.26%0.26%5.50%5.50%30%$293,867 
2021$11.620.200.831.03(0.17)$12.488.93%0.27%0.27%1.66%1.66%22%$305,728 
2020$11.380.340.210.55(0.31)$11.624.84%0.27%0.27%2.90%2.90%24%$273,591 
2019$11.530.28(0.08)0.20(0.35)$11.381.83%0.27%0.27%2.37%2.37%21%$327,939 
2018$11.690.29(0.17)0.12(0.28)$11.530.92%0.27%0.27%2.54%2.54%23%$445,988 
R6 Class
2022(3)
$12.510.54(1.97)(1.43)(0.24)$10.84(11.56)%
0.24%(4)
0.24%(4)
9.17%(4)
9.17%(4)
11%$512,797 
2022$12.480.71(0.07)0.64(0.61)$12.515.07%0.21%0.21%5.55%5.55%30%$554,324 
2021$11.610.210.841.05(0.18)$12.489.08%0.22%0.22%1.71%1.71%22%$454,592 
2020$11.380.330.210.54(0.31)$11.614.80%0.22%0.22%2.95%2.95%24%$303,503 
2019$11.520.26(0.04)0.22(0.36)$11.381.98%0.22%0.22%2.42%2.42%21%$238,545 
2018(7)
$11.550.20(0.11)0.09(0.12)$11.520.74%
0.22%(4)
0.22%(4)
2.56%(4)
2.56%(4)
23%(6)
$107,331 



For a Share Outstanding Throughout the Years Ended March 31 (except as noted)
Per-Share DataRatios and Supplemental Data
Income From Investment Operations:Ratio to Average Net Assets of:
Net Asset
Value,
Beginning
of Period
Net
Investment
Income
(Loss)(1)
Net
Realized
and
Unrealized
Gain (Loss)
Total From
Investment
Operations
Distributions From Net
Investment
Income
Net Asset
Value,
End
of Period
Total
Return(2)
Operating
Expenses
Operating
Expenses
(before
expense
waiver)
Net
Investment
Income
(Loss)
Net
Investment
Income
(Loss)
(before
expense
waiver)
Portfolio
Turnover
Rate
Net
Assets,
End of
Period
(in thousands)
G Class
2022(3)
$12.530.56(1.98)(1.42)(0.25)$10.86(11.45)%
0.03%(4)
0.24%(4)
9.38%(4)
9.17%(4)
11%$776,415 
2022$12.490.74(0.07)0.67(0.63)$12.535.37%0.01%0.21%5.75%5.55%30%$899,091 
2021$11.630.260.801.06(0.20)$12.499.20%0.01%0.22%1.92%1.71%22%$968,646 
2020$11.390.370.210.58(0.34)$11.635.11%0.01%0.22%3.16%2.95%24%$434,322 
2019$11.530.30(0.06)0.24(0.38)$11.392.19%0.01%0.22%2.63%2.42%21%$529,604 
2018(7)
$11.550.22(0.12)0.10(0.12)$11.530.88%
0.01%(4)
0.22%(4)
2.80%(4)
2.59%(4)
23%(6)
$639,280 

Notes to Financial Highlights
(1)Computed using average shares outstanding throughout the period.
(2)Total returns are calculated based on the net asset value of the last business day and do not reflect applicable sales charges, if any. Total returns for periods less than one year are not annualized.
(3)Six months ended September 30, 2022 (unaudited).
(4)Annualized.
(5)April 10, 2017 (commencement of sale) through March 31, 2018.
(6)Portfolio turnover is calculated at the fund level. Percentage indicated was calculated for the year ended March 31, 2018.
(7)July 28, 2017 (commencement of sale) through March 31, 2018.


See Notes to Financial Statements.




Approval of Management Agreement

At a meeting held on June 21, 2022, the Fund’s Board of Trustees (the "Board") unanimously approved the renewal of the management agreement pursuant to which American Century Investment Management, Inc. (the “Advisor”) acts as the investment advisor for the Fund. Under Section 15(c) of the Investment Company Act of 1940 (the “Investment Company Act”), contracts for investment advisory services are required to be reviewed, evaluated, and approved by a majority of a fund’s Trustees, including a majority of the independent Trustees, each year. The Board regards this annual evaluation and renewal as one of its most important responsibilities.

The independent Trustees have memorialized a statement regarding the relationship between their ongoing obligations to oversee and evaluate the performance of the Advisor and their annual consideration of renewal of the management agreement. In that statement, the independent Trustees noted that their assessment of the Advisor’s performance is an ongoing process that takes place over the entire year and is informed by all of the extensive information that the Board and its committees receive and consider over time. This information, together with the additional materials provided specifically in connection with the review, are central to the Board’s assessment of the Advisor’s performance and its determination whether to renew the Fund’s management agreement.

Prior to its consideration of the renewal of the management agreement, the Board requested and reviewed data and analysis relating to the proposed renewal. This information and analysis was compiled by the Advisor and certain independent providers of evaluation data concerning the Fund.

In connection with its consideration of the renewal of the management agreement, the Board’s review and evaluation of the services provided by the Advisor and its affiliates included, but was not limited to, the following:

the nature, extent, and quality of investment management, shareholder services, and other services provided and to be provided to the Fund including without limitation portfolio management and trading services, shareholder and intermediary service levels and quality, compliance and legal services, fund accounting and financial reporting, and fund share distribution;
the wide range of other programs and services provided by the Advisor and its affiliates to the Fund and its shareholders on a routine and non-routine basis;
the Fund’s investment performance, including data comparing the Fund’s performance to appropriate benchmarks and/or a peer group of other mutual funds with similar investment objectives and strategies;
the cost of owning the Fund compared to the cost of owning similarly-managed funds;
the compliance policies, procedures, and regulatory experience of the Advisor and its affiliates and certain other Fund service providers;
financial data showing the cost of services provided by the Advisor and its affiliates to the Fund, the profitability of the Fund to the Advisor, and the overall profitability of the Advisor;
the Advisor’s strategic plans, generally, and with respect to the ongoing impact of the COVID-19 pandemic response, heightened areas of interest in the mutual fund industry and recent geopolitical issues;
the Advisor’s business continuity plans, vendor management practices, and cyber security practices;
any economies of scale associated with the Advisor’s management of the Fund;
services provided and charges to the Advisor’s other investment management clients;
fees and expenses associated with any investment by the Fund in other funds;
payments and practices in connection with financial intermediaries holding shares of the Fund on behalf of their clients and the services provided by intermediaries in connection therewith; and
any collateral benefits derived by the Advisor from the management of the Fund.
29


In keeping with its practice, the Board held two meetings and the independent Trustees met in private session to discuss the renewal and to review and discuss the information provided in response to their request. The Board held active discussions with the Advisor regarding the renewal of the management agreement. The independent Trustees had the benefit of the advice of their independent counsel throughout the process.

Factors Considered

The Trustees considered all of the information provided by the Advisor, the independent data providers, and the independent Trustees’ independent counsel in connection with the approval. They determined that the information was sufficient for them to evaluate the management agreement for the Fund. In connection with their review, the Trustees did not identify any single factor as being all-important or controlling and each Trustee may have attributed different levels of importance to different factors. In deciding to renew the management agreement, the Board based its decision on a number of factors, including the following:

Nature, Extent and Quality of Services — Generally. Under the management agreement, the Advisor is responsible for providing or arranging for all services necessary for the operation of the Fund. The Board noted that the Advisor provides or arranges at its own expense a wide variety of services including:

constructing and designing the Fund
portfolio research and security selection
initial capitalization/funding
securities trading
Fund administration
custody of Fund assets
daily valuation of the Fund’s portfolio
shareholder servicing and transfer agency, including shareholder confirmations, recordkeeping, and communications
legal services (except the independent Trustees’ counsel)
regulatory and portfolio compliance
financial reporting
marketing and distribution (except amounts paid by the Fund under Rule 12b-1 plans)

The Board noted that many of these services have expanded over time in terms of both quantity and complexity in response to shareholder demands, competition in the industry, changing distribution channels, and the changing regulatory environment.

Investment Management Services. The nature of the investment management services provided to the Fund is quite complex and allows Fund shareholders access to professional money management, instant diversification of their investments within an asset class, the opportunity to easily diversify among asset classes by investing in or exchanging among various American Century Investments funds, and liquidity. In evaluating investment performance, the Board expects the Advisor to manage the Fund in accordance with its investment objectives and principal investment strategies. Further, the Trustees recognize that the Advisor has an obligation to seek the best execution of fund trades. In providing these services, the Advisor utilizes teams of investment professionals (portfolio managers, analysts, research assistants, and securities traders) who require extensive information technology, research, training, compliance, and other systems to conduct their business. The Board, directly and through its Portfolio Committee, regularly reviews investment performance information for the Fund, together with comparative information for appropriate benchmarks and/or peer groups of similarly-managed funds, over different time horizons. The Trustees also review investment performance information during the management agreement renewal process. If performance concerns are identified, the Fund receives special reviews until performance improves, during which the Board discusses with the Advisor the reasons for such results (e.g., market conditions, security selection) and any actions being taken to improve performance. The Fund’s performance was above its benchmark for the one-, three-, five-, and ten-year periods reviewed by the Board. The Board found the investment management
30


services provided by the Advisor to the Fund to be satisfactory and consistent with the management agreement.

Shareholder and Other Services. Under the management agreement, the Advisor, either directly or through affiliates or third parties, provides the Fund with a comprehensive package of transfer agency, shareholder, and other services. The Board, directly and through its various committees, regularly reviews reports and evaluations of such services at its regular meetings. These reports include, but are not limited to, information regarding the operational efficiency and accuracy of the shareholder and transfer agency services provided, staffing levels, shareholder satisfaction, technology support (including cyber security), new products and services offered to Fund shareholders, securities trading activities, portfolio valuation services, auditing services, and legal and operational compliance activities. The Board found the services provided by the Advisor to the Fund under the management agreement to be competitive and of high quality.

Costs of Services and Profitability. The Advisor provides detailed information concerning its cost of providing various services to the Fund, its profitability in managing the Fund, its overall profitability, and its financial condition. The Trustees have reviewed with the Advisor the methodology used to prepare this financial information. This information is considered in evaluating the Advisor’s financial condition, its ability to continue to provide services under the management agreement, and the reasonableness of the current management fee. The Board concluded that the Advisor’s profits were reasonable in light of the services provided to the Fund.

Ethics. The Board generally considers the Advisor’s commitment to providing quality services to shareholders and to conducting its business ethically. They noted that the Advisor’s practices generally meet or exceed industry best practices.

Economies of Scale. The Board also reviewed information provided by the Advisor regarding the possible existence of economies of scale in connection with the management of the Fund. The Board concluded that economies of scale are difficult to measure and predict with precision, especially on a fund-by-fund basis. The Board concluded that the Advisor is appropriately sharing economies of scale, to the extent they exist, through its fee structure and through reinvestment in its business, infrastructure, investment capabilities and initiatives to provide shareholders enhanced and expanded services.

Comparison to Other Funds’ Fees. The management agreement provides that the Fund pays the Advisor a single, all-inclusive (or unified) management fee for providing all services necessary for the management and operation of the Fund, other than securities transaction expenses, taxes, interest, extraordinary expenses, fees and expenses of the Fund’s independent Trustees (including their independent legal counsel), and expenses incurred in connection with the provision of shareholder services and distribution services under a plan adopted pursuant to Rule 12b-1 under the Investment Company Act. Under this unified fee structure, the Advisor is responsible for providing all investment advisory, custody, audit, administrative, compliance, recordkeeping, marketing, and shareholder services, or arranging and supervising third parties to provide such services. By contrast, most other funds are charged a variety of fees, including an investment advisory fee, a transfer agency fee, an administrative fee, and other expenses. Other than their investment advisory fees and any applicable Rule 12b-1 distribution fees, all other components of the total fees charged by these other funds may be increased without shareholder approval. The Board believes the unified fee structure is a benefit to Fund shareholders because it clearly discloses to shareholders the cost of owning Fund shares, and, since the unified fee cannot be increased without a vote of Fund shareholders, it shifts to the Advisor the risk of increased costs of operating the Fund and provides a direct incentive to minimize administrative inefficiencies. Part of the Board’s analysis of fee levels involves reviewing certain evaluative data compiled by an independent provider and comparing the Fund’s unified fee to the total expense ratio of peer funds. The unified fee charged to shareholders of the Fund was below the median of the total expense ratios of the Fund’s peer group. The Board concluded that the management fee paid by the Fund to the Advisor under the management agreement is reasonable in light of the services provided to the Fund.
31


Comparison to Fees and Services Provided to Other Clients of the Advisor. The Board also requested and received information from the Advisor concerning the nature of the services, fees, costs, and profitability of its advisory services to advisory clients other than the Fund. They observed that these varying types of client accounts require different services and involve different regulatory and entrepreneurial risks than the management of the Fund. The Board analyzed this information and concluded that the fees charged and services provided to the Fund were reasonable by comparison.

Payments to Intermediaries. The Trustees also requested and received a description of payments made to intermediaries by the Fund and the Advisor and services provided by intermediaries. These payments include various payments made by the Fund or the Advisor to different types of intermediaries and recordkeepers for distribution and service activities provided with respect to the Fund. The Trustees reviewed such information and received representations from the Advisor that all such payments by the Fund were made pursuant to the Fund’s Rule 12b-1 Plan and that all such payments by the Advisor were made from the Advisor’s resources and reasonable profits.

Collateral or “Fall-Out” Benefits Derived by the Advisor. The Board considered the possible existence of collateral benefits the Advisor may receive as a result of its relationship with the Fund. The Board noted that the Advisor’s primary business is managing funds and it generally does not use fund or shareholder information to generate profits in other lines of business, and therefore does not derive any significant collateral benefits from them. The Board noted that the Advisor may receive proprietary research from broker-dealers that execute fund portfolio transactions. The Board also determined that the Advisor is able to provide investment management services to certain clients other than the Fund, at least in part, due to its existing infrastructure built to serve the fund complex. The Board also noted that the assets of those other accounts are, where applicable, included with the assets of the Fund to determine breakpoints in the management fee schedule.

Existing Relationship. The Board also considered whether there was any reason for not continuing the existing arrangement with the Advisor. In this regard, the Board was mindful of the potential disruptions of the Fund’s operations and various risks, uncertainties, and other effects that could occur as a result of a decision not to continue such relationship. In particular, the Board recognized that most shareholders have invested in the Fund on the strength of the Advisor’s industry standing and reputation and in the expectation that the Advisor will have a continuing role in providing advisory services to the Fund.

Conclusion of the Trustees. As a result of this process, the Board, including all of the independent Trustees, taking into account all of the factors discussed above and the information provided by the Advisor and others in connection with its review and throughout the year, concluded that the terms of the management agreement are fair and reasonable and that the management fee charged to the Fund is reasonable in light of the services provided and that the management agreement between the Fund and the Advisor should be renewed for an additional one-year period.


32


Additional Information

Retirement Account Information

As required by law, distributions you receive from certain retirement accounts are subject to federal income tax withholding, unless you elect not to have withholding apply*. Tax will be withheld on the total amount withdrawn even though you may be receiving amounts that are not subject to withholding, such as nondeductible contributions. In such case, excess amounts of withholding could occur. You may adjust your withholding election so that a greater or lesser amount will be withheld.

If you don’t want us to withhold on this amount, you must notify us to not withhold the federal income tax. You may notify us in writing or in certain situations by telephone or through other electronic means. For systematic withdrawals, your withholding election will remain in effect until revoked or changed by filing a new election. You have the right to revoke your election at any time and change your withholding percentage for future distributions.

Remember, even if you elect not to have income tax withheld, you are liable for paying income tax on the taxable portion of your withdrawal. If you elect not to have income tax withheld or you don’t have enough income tax withheld, you may be responsible for payment of estimated tax. You may incur penalties under the estimated tax rules if your withholding and estimated tax payments are not sufficient. You can reduce or defer the income tax on a distribution by directly or indirectly rolling such distribution over to another IRA or eligible plan. You should consult your tax advisor for additional information.

State tax will be withheld if, at the time of your distribution, your address is within one of the mandatory withholding states and you have federal income tax withheld (or as otherwise required by state law). State taxes will be withheld from your distribution in accordance with the respective state rules.

*Some 403(b), 457 and qualified retirement plan distributions may be subject to 20% mandatory withholding, as they are subject to special tax and withholding rules.  Your plan administrator or plan sponsor is required to provide you with a special tax notice explaining those rules at the time you request a distribution.  If applicable, federal and/or state taxes may be withheld from your distribution amount.


Proxy Voting Policies

Descriptions of the principles and policies that the fund's investment advisor uses in exercising the voting rights associated with the securities purchased and/or held by the fund are available without charge, upon request, by calling 1-800-345-2021 or visiting American Century Investments’ website at americancentury.com/proxy. A description of the policies is also available on the Securities and Exchange Commission’s website at sec.gov. Information regarding how the investment advisor voted proxies relating to portfolio securities during the most recent 12-month period ended June 30 is available on americancentury.com/proxy. It is also available at sec.gov.


Quarterly Portfolio Disclosure

The fund files its complete schedule of portfolio holdings with the Securities and Exchange Commission (SEC) for the first and third quarters of each fiscal year as an exhibit to its reports on Form N-PORT. These portfolio holdings are available on the fund's website at americancentury.com and, upon request, by calling 1-800-345-2021. The fund’s Form N-PORT reports are available on the SEC’s website at sec.gov.



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Notes


34


Notes


35


Notes


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American Century Government Income Trust
Investment Advisor:
American Century Investment Management, Inc.
Kansas City, Missouri
This report and the statements it contains are submitted for the general information of our shareholders. The report is not authorized for distribution to prospective investors unless preceded or accompanied by an effective prospectus.
©2022 American Century Proprietary Holdings, Inc. All rights reserved.
CL-SAN-90811 2211




    


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Semiannual Report
September 30, 2022
Short-Term Government Fund
Investor Class (TWUSX)
I Class (ASGHX)
A Class (TWAVX)
C Class (TWACX)
R Class (TWARX)
R5 Class (TWUOX)















Table of Contents
President’s Letter
Fund Characteristics
Shareholder Fee Example
Schedule of Investments
Statement of Assets and Liabilities
Statement of Operations
Statement of Changes in Net Assets
Notes to Financial Statements
Financial Highlights
Approval of Management Agreement
Additional Information




























Any opinions expressed in this report reflect those of the author as of the date of the report, and do not necessarily represent the opinions of American Century Investments® or any other person in the American Century Investments organization. Any such opinions are subject to change at any time based upon market or other conditions and American Century Investments disclaims any responsibility to update such opinions. These opinions may not be relied upon as investment advice and, because investment decisions made by American Century Investments funds are based on numerous factors, may not be relied upon as an indication of trading intent on behalf of any American Century Investments fund. Security examples are used for representational purposes only and are not intended as recommendations to purchase or sell securities. Performance information for comparative indices and securities is provided to American Century Investments by third party vendors. To the best of American Century Investments’ knowledge, such information is accurate at the time of printing.



President’s Letter
image6.jpg Jonathan Thomas

Dear Investor:

Thank you for reviewing this semiannual report for the period ending September 30, 2022. It provides a market overview (below), followed by a schedule of fund investments and other financial information. For additional investment insights, please visit americancentury.com.

Inflation, Rates, Recession Worries Weighed on Financial Markets

The reporting period began with financial markets digesting the effects of soaring inflation, heightened market volatility and slowing growth. For more than a year, the effects of massive fiscal and monetary support, escalating energy prices, supply chain breakdowns and labor market shortages had driven inflation to multidecade highs. The Russia-Ukraine war continued to nudge commodity prices even higher, exacerbating existing inflationary pressures and further damaging global supply chains.

The Federal Reserve (Fed), which began tightening in March with a 25-basis-points (bps) hike, increased rates an additional 275 bps during the six-month period. Inflation was slow to respond, climbing to a 40-year-high 9.1% in June before slipping to 8.2% in September, largely due to falling gasoline prices. Policymakers indicated taming inflation remains their priority, even as the economy contracted in 2022’s first two quarters and an official recession appeared imminent.

In addition to fueling recession risk, the combination of elevated inflation and a hawkish Fed helped push Treasury yields sharply higher and stock prices significantly lower. Amid persistent market unrest, most stock and bond indices ended the six-month period with steep losses. Stocks, as measured by the S&P 500 Index, plunged more than 20%, while bonds, as measured by the Bloomberg U.S. Aggregate Bond Index, tumbled more than 9%.

Staying Disciplined in Uncertain Times

We expect market volatility to linger as investors navigate a complex environment of high inflation, rising interest rates and economic uncertainty. In addition, Russia’s invasion of Ukraine complicates an increasingly tense geopolitical backdrop and threatens global energy markets. We will continue to monitor this evolving situation and what it broadly means for investors across asset classes.

We appreciate your confidence in us during these extraordinary times. Our firm has a long history of helping clients weather unpredictable markets, and we’re confident we will continue to meet today’s challenges.

Sincerely,
image48a16.jpg
Jonathan Thomas
President and Chief Executive Officer
American Century Investments
2


Fund Characteristics
SEPTEMBER 30, 2022
Types of Investments in Portfolio% of net assets
U.S. Treasury Securities63.9%
Collateralized Mortgage Obligations8.3%
Asset-Backed Securities5.0%
U.S. Government Agency Securities4.3%
U.S. Government Agency Mortgage-Backed Securities1.5%
Short-Term Investments17.1%
Other Assets and Liabilities(0.1)%
3


Shareholder Fee Example

Fund shareholders may incur two types of costs: (1) transaction costs, including sales charges (loads) on purchase payments and redemption/exchange fees; and (2) ongoing costs, including management fees; distribution and service (12b-1) fees; and other fund expenses. This example is intended to help you understand your ongoing costs (in dollars) of investing in your fund and to compare these costs with the ongoing cost of investing in other mutual funds.

The example is based on an investment of $1,000 made at the beginning of the period and held for the entire period from April 1, 2022 to September 30, 2022.

Actual Expenses

The table provides information about actual account values and actual expenses for each class. You may use the information, together with the amount you invested, to estimate the expenses that you paid over the period. First, identify the share class you own. Then simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number under the heading “Expenses Paid During Period” to estimate the expenses you paid on your account during this period.

If you hold Investor Class shares of any American Century Investments mutual fund, or I Class shares of the American Century Diversified Bond Fund, in an American Century Investments account (i.e., not through a financial intermediary or employer-sponsored retirement plan account), American Century Investments may charge you a $25 annual account maintenance fee if the value of those shares is less than $10,000. We will redeem shares automatically in one of your accounts to pay the $25 fee. In determining your total eligible investment amount, we will include your investments in all personal accounts (including American Century Investments brokerage accounts) registered under your Social Security number. Personal accounts include individual accounts, joint accounts, UGMA/UTMA accounts, personal trusts, Coverdell Education Savings Accounts and IRAs (including traditional, Roth, Rollover, SEP-, SARSEP- and SIMPLE-IRAs), and certain other retirement accounts. If you have only business, business retirement, employer-sponsored or American Century Investments brokerage accounts, you are currently not subject to this fee. If you are subject to the account maintenance fee, your account value could be reduced by the fee amount.

Hypothetical Example for Comparison Purposes

The table also provides information about hypothetical account values and hypothetical expenses based on the actual expense ratio of each class of your fund and an assumed rate of return of 5% per year before expenses, which is not the actual return of a fund’s share class. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in your fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds.

Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transactional costs, such as sales charges (loads) or redemption/exchange fees. Therefore, the table is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. In addition, if these transactional costs were included, your costs would have been higher.

4


Beginning
Account Value
4/1/22
Ending
Account Value
9/30/22
Expenses Paid
During Period(1)
4/1/22 - 9/30/22
Annualized
Expense Ratio(1)
Actual
Investor Class$1,000$978.40$2.730.55%
I Class$1,000$978.80$2.230.45%
A Class$1,000$977.20$3.970.80%
C Class$1,000$973.80$7.671.55%
R Class$1,000$975.40$5.201.05%
R5 Class$1,000$979.30$1.740.35%
Hypothetical
Investor Class$1,000$1,022.31$2.790.55%
I Class$1,000$1,022.81$2.280.45%
A Class$1,000$1,021.06$4.050.80%
C Class$1,000$1,017.30$7.841.55%
R Class$1,000$1,019.80$5.321.05%
R5 Class$1,000$1,023.31$1.780.35%
(1)Expenses are equal to the class's annualized expense ratio listed in the table above, multiplied by the average account value over the period, multiplied by 183, the number of days in the most recent fiscal half-year, divided by 365, to reflect the one-half year period. Annualized expense ratio reflects actual expenses, including any applicable fee waivers or expense reimbursements and excluding any acquired fund fees and expenses.
5


Schedule of Investments

SEPTEMBER 30, 2022 (UNAUDITED)
Principal Amount/SharesValue
U.S. TREASURY SECURITIES — 63.9%


U.S. Treasury Notes, 0.25%, 6/15/23(1)
$500,000 $486,579 
U.S. Treasury Notes, 0.125%, 1/15/2414,000,000 13,272,109 
U.S. Treasury Notes, 2.75%, 2/15/241,000,000 978,828 
U.S. Treasury Notes, 2.25%, 3/31/242,000,000 1,940,313 
U.S. Treasury Notes, 0.375%, 4/15/2413,000,000 12,241,836 
U.S. Treasury Notes, 2.50%, 4/30/248,500,000 8,264,258 
U.S. Treasury Notes, 3.00%, 6/30/249,000,000 8,805,059 
U.S. Treasury Notes, 1.50%, 9/30/245,000,000 4,740,918 
U.S. Treasury Notes, 2.125%, 9/30/245,000,000 4,799,609 
U.S. Treasury Notes, 1.75%, 12/31/248,000,000 7,581,562 
U.S. Treasury Notes, 1.125%, 1/15/2514,500,000 13,511,621 
U.S. Treasury Notes, 1.50%, 2/15/2525,000,000 23,439,453 
U.S. Treasury Notes, 1.75%, 3/15/2511,000,000 10,359,766 
U.S. Treasury Notes, 2.625%, 4/15/257,000,000 6,723,555 
U.S. Treasury Notes, 2.75%, 6/30/2512,000,000 11,536,406 
U.S. Treasury Notes, 3.125%, 8/15/251,500,000 1,454,121 
U.S. Treasury Notes, 3.50%, 9/15/255,000,000 4,898,438 
U.S. Treasury Notes, 3.00%, 9/30/252,500,000 2,413,379 
U.S. Treasury Notes, VRN, 3.33%, (3-month USBMMY plus 0.03%), 4/30/233,000,000 3,003,785 
U.S. Treasury Notes, VRN, 3.33%, (3-month USBMMY plus 0.04%), 10/31/232,000,000 2,002,117 
TOTAL U.S. TREASURY SECURITIES
(Cost $147,364,070)
142,453,712 
COLLATERALIZED MORTGAGE OBLIGATIONS — 8.3%


U.S. Government Agency Collateralized Mortgage Obligations — 8.3%
FHLMC, Series 3114, Class FT, VRN, 3.17%, (1-month LIBOR plus 0.35%), 9/15/30206,507 205,625 
FHLMC, Series 3149, Class LF, VRN, 3.12%, (1-month LIBOR plus 0.30%), 5/15/36723,217 713,629 
FHLMC, Series 3200, Class FP, VRN, 3.02%, (1-month LIBOR plus 0.20%), 8/15/36437,202 429,187 
FHLMC, Series 3206, Class FE, VRN, 3.22%, (1-month LIBOR plus 0.40%), 8/15/36189,503 187,723 
FHLMC, Series 3213, Class LF, VRN, 3.04%, (1-month LIBOR plus 0.22%), 9/15/36596,537 586,149 
FHLMC, Series 3231, Class FA, VRN, 3.22%, (1-month LIBOR plus 0.40%), 10/15/36202,311 200,385 
FHLMC, Series 3301, Class FA, VRN, 3.12%, (1-month LIBOR plus 0.30%), 8/15/35188,798 186,322 
FHLMC, Series 3380, Class FP, VRN, 3.17%, (1-month LIBOR plus 0.35%), 11/15/36227,654 224,959 
FHLMC, Series 3508, Class PF, VRN, 3.67%, (1-month LIBOR plus 0.85%), 2/15/3987,366 88,139 
FHLMC, Series 3587, Class FB, VRN, 3.60%, (1-month LIBOR plus 0.78%), 2/15/36226,180 227,802 
FHLMC, Series J22F, Class A2 SEQ, 4.09%, 9/25/24598,106 594,428 
FHLMC, Series K032, Class A2 SEQ, VRN, 3.31%, 5/25/23670,000 664,704 
FHLMC, Series K037, Class A1 SEQ, 2.59%, 4/25/23147,074 146,332 
FHLMC, Series K039, Class A1 SEQ, 2.68%, 12/25/23426,090 421,895 
6


Principal Amount/SharesValue
FHLMC, Series K043, Class A1 SEQ, 2.53%, 10/25/23$315,823 $312,057 
FHLMC, Series K043, Class A2 SEQ, 3.06%, 12/25/24794,000 768,200 
FHLMC, Series K725, Class A2 SEQ, 3.00%, 1/25/242,058,321 2,020,985 
FHLMC, Series K726, Class A2 SEQ, 2.91%, 4/25/241,176,528 1,149,519 
FHLMC, Series K739, Class A1 SEQ, 0.52%, 11/25/262,275,935 2,105,537 
FHLMC, Series KF32, Class A, VRN, 2.92%, (1-month LIBOR plus 0.37%), 5/25/2432,780 32,729 
FHLMC, Series KF35, Class A, VRN, 2.90%, (1-month LIBOR plus 0.35%), 8/25/24138,097 137,845 
FHLMC, Series KIR1, Class A1 SEQ, 2.45%, 3/25/261,553,066 1,499,153 
FHLMC, Series KJ25, Class A2 SEQ, 2.61%, 1/25/26636,890 607,040 
FNMA, Series 2004-28, Class FE, VRN, 3.43%, (1-month LIBOR plus 0.35%), 5/25/34656,360 652,750 
FNMA, Series 2006-11, Class FA, VRN, 3.38%, (1-month LIBOR plus 0.30%), 3/25/36202,608 200,664 
FNMA, Series 2006-60, Class KF, VRN, 3.38%, (1-month LIBOR plus 0.30%), 7/25/36522,545 516,469 
FNMA, Series 2006-72, Class TE, VRN, 3.38%, (1-month LIBOR plus 0.30%), 8/25/36238,949 232,647 
FNMA, Series 2008-9, Class FA, VRN, 3.58%, (1-month LIBOR plus 0.50%), 2/25/38719,994 715,998 
FNMA, Series 2009-33, Class FB, VRN, 3.90%, (1-month LIBOR plus 0.82%), 3/25/37275,063 277,766 
FNMA, Series 2009-89, Class FD, VRN, 3.68%, (1-month LIBOR plus 0.60%), 5/25/36139,894 139,848 
FNMA, Series 2016-11, Class FB, VRN, 2.70%, (1-month LIBOR plus 0.55%), 3/25/46210,998 208,086 
FNMA, Series 2016-M13, Class FA, VRN, 3.04%, (1-month LIBOR plus 0.67%), 11/25/237,172 7,168 
FRESB Mortgage Trust, Series 2021-SB83, Class A5F, VRN, 0.63%, 1/25/261,961,784 1,758,501 
GNMA, Series 2010-14, Class QF, VRN, 3.39%, (1-month LIBOR plus 0.45%), 2/16/40395,157 394,338 
TOTAL COLLATERALIZED MORTGAGE OBLIGATIONS
(Cost $19,333,593)
18,614,579 
ASSET-BACKED SECURITIES — 5.0%


Brazos Education Loan Authority, Inc., Series 2021-1, Class A1B, VRN, 3.66%, (1-month LIBOR plus 0.58%), 11/25/711,140,232 1,114,023 
Brazos Education Loan Authority, Inc., Series 2021-2, Class A1B, VRN, 3.78%, (1-month LIBOR plus 0.70%), 1/25/721,060,308 1,039,009 
ECMC Group Student Loan Trust, Series 2021-1A, Class A1B, VRN, 3.65%, (1-month LIBOR plus 0.57%), 11/25/70(2)
1,496,976 1,460,919 
Missouri Higher Education Loan Authority, Series 2021-2, Class A1B, VRN, 3.78%, (1-month LIBOR plus 0.70%), 3/25/61278,997 272,969 
Missouri Higher Education Loan Authority, Series 2021-3, Class A1B, VRN, 3.65%, (1-month LIBOR plus 0.57%), 8/25/611,156,141 1,109,585 
Nelnet Student Loan Trust, Series 2006-1, Class A6, VRN, 3.41%, (3-month LIBOR plus 0.45%), 8/23/36(2)
1,565,236 1,516,563 
North Texas Higher Education Authority, Inc., Series 2021-1, Class A1B, VRN, 3.65%, (1-month LIBOR plus 0.57%), 9/25/611,809,253 1,769,576 
North Texas Higher Education Authority, Inc., Series 2021-2, Class A1B, VRN, 3.65%, (1-month LIBOR plus 0.57%), 10/25/611,838,784 1,767,373 
Pennsylvania Higher Education Assistance Agency, Series 2021-1A, Class A, VRN, 3.61%, (1-month LIBOR plus 0.53%), 5/25/70(2)
1,133,382 1,105,942 
TOTAL ASSET-BACKED SECURITIES
(Cost $11,412,171)
11,155,959 
U.S. GOVERNMENT AGENCY SECURITIES — 4.3%


FHLB, 0.125%, 8/28/23
(Cost $9,990,194)
10,000,000 9,628,465 
7


Principal Amount/SharesValue
U.S. GOVERNMENT AGENCY MORTGAGE-BACKED SECURITIES — 1.5%
Adjustable-Rate U.S. Government Agency Mortgage-Backed Securities — 1.4%
FHLMC, VRN, 3.63%, (6-month LIBOR plus 2.26%), 3/1/24$5,095 $5,018 
FHLMC, VRN, 2.94%, (1-year H15T1Y plus 2.25%), 9/1/3563,789 65,177 
FHLMC, VRN, 3.20%, (1-year H15T1Y plus 2.14%), 10/1/3634,687 35,633 
FHLMC, VRN, 3.01%, (1-year H15T1Y plus 2.26%), 4/1/3726,984 27,536 
FHLMC, VRN, 3.32%, (12-month LIBOR plus 1.82%), 5/1/4018,679 18,538 
FHLMC, VRN, 4.13%, (12-month LIBOR plus 1.88%), 7/1/4033,891 34,386 
FHLMC, VRN, 3.31%, (12-month LIBOR plus 1.78%), 9/1/4015,187 15,297 
FHLMC, VRN, 3.18%, (12-month LIBOR plus 1.88%), 5/1/4139,753 40,401 
FHLMC, VRN, 2.13%, (12-month LIBOR plus 1.88%), 10/1/41128,908 127,436 
FHLMC, VRN, 1.90%, (12-month LIBOR plus 1.65%), 12/1/4260,548 60,531 
FHLMC, VRN, 2.91%, (12-month LIBOR plus 1.63%), 1/1/44135,715 135,284 
FHLMC, VRN, 3.27%, (12-month LIBOR plus 1.62%), 6/1/4472,393 71,358 
FHLMC, VRN, 3.48%, (12-month LIBOR plus 1.59%), 10/1/4437,189 37,553 
FHLMC, VRN, 3.54%, (12-month LIBOR plus 1.60%), 6/1/4561,507 62,033 
FNMA, VRN, 3.51%, (1-year H15T1Y plus 2.16%), 8/1/23154 153 
FNMA, VRN, 2.41%, (1-year H15T1Y plus 2.28%), 5/1/255,199 5,104 
FNMA, VRN, 2.23%, (6-month LIBOR plus 1.50%), 3/1/33113,725 113,345 
FNMA, VRN, 3.18%, (6-month LIBOR plus 1.57%), 6/1/3565,428 66,941 
FNMA, VRN, 3.21%, (6-month LIBOR plus 1.57%), 6/1/3579,284 81,118 
FNMA, VRN, 3.25%, (6-month LIBOR plus 1.57%), 6/1/35124,410 127,298 
FNMA, VRN, 3.29%, (6-month LIBOR plus 1.57%), 6/1/359,976 10,209 
FNMA, VRN, 3.00%, (6-month LIBOR plus 1.54%), 9/1/3545,453 46,430 
FNMA, VRN, 2.83%, (6-month LIBOR plus 1.55%), 3/1/36130,847 133,738 
FNMA, VRN, 2.00%, (12-month LIBOR plus 1.75%), 11/1/39101,150 100,290 
FNMA, VRN, 2.07%, (12-month LIBOR plus 1.69%), 1/1/407,487 7,509 
FNMA, VRN, 4.04%, (12-month LIBOR plus 1.79%), 8/1/4033,934 34,549 
FNMA, VRN, 4.00%, (12-month LIBOR plus 1.75%), 7/1/4116,324 16,113 
FNMA, VRN, 2.64%, (12-month LIBOR plus 1.74%), 5/1/421,069,304 1,090,529 
FNMA, VRN, 2.74%, (12-month LIBOR plus 1.58%), 3/1/4324,709 24,545 
FNMA, VRN, 3.83%, (12-month LIBOR plus 1.59%), 8/1/4523,160 23,239 
FNMA, VRN, 2.71%, (12-month LIBOR plus 1.61%), 4/1/4696,015 98,194 
FNMA, VRN, 2.92%, (12-month LIBOR plus 1.61%), 4/1/4655,104 55,754 
FNMA, VRN, 2.79%, (12-month LIBOR plus 1.61%), 5/1/46125,173 127,053 
FNMA, VRN, 3.18%, (12-month LIBOR plus 1.61%), 3/1/4764,293 61,605 
FNMA, VRN, 3.11%, (12-month LIBOR plus 1.61%), 4/1/4757,638 55,316 
FNMA, VRN, 4.45%, (12-month LIBOR plus 1.60%), 9/1/4728,057 28,286 
3,043,499 
Fixed-Rate U.S. Government Agency Mortgage-Backed Securities — 0.1%
FNMA, 7.00%, 5/1/3210,152 10,133 
FNMA, 7.00%, 5/1/3270,655 72,259 
FNMA, 7.00%, 6/1/3244,609 45,590 
FNMA, 7.00%, 8/1/3210,159 10,154 
FNMA, 3.50%, 3/1/3489,026 84,403 
222,539 
TOTAL U.S. GOVERNMENT AGENCY MORTGAGE-BACKED SECURITIES
(Cost $3,330,647)
3,266,038 
SHORT-TERM INVESTMENTS — 17.1%


Money Market Funds
State Street Institutional U.S. Government Money Market Fund, Premier Class18,071 18,071 
8


Principal Amount/SharesValue
Repurchase Agreements — 4.1%
BMO Capital Markets Corp., (collateralized by various U.S. Treasury obligations, 0.625% - 4.625%, 1/15/25 - 5/15/47, valued at $1,539,842), in a joint trading account at 2.86%, dated 9/30/22, due 10/3/22 (Delivery value $1,514,029)$1,513,668 
Fixed Income Clearing Corp., (collateralized by various U.S. Treasury obligations, 3.250%, 6/30/29, valued at $7,721,445), at 2.95%, dated 9/30/22, due 10/3/22 (Delivery value $7,571,861)7,570,000 
9,083,668 
Treasury Bills — 13.0%(3)
U.S. Treasury Bills, 3.97%, 9/7/23
$30,000,000 28,913,434 
TOTAL SHORT-TERM INVESTMENTS
(Cost $38,027,295)
38,015,173 
TOTAL INVESTMENT SECURITIES — 100.1%
(Cost $229,457,970)

223,133,926 
OTHER ASSETS AND LIABILITIES — (0.1)%

(165,159)
TOTAL NET ASSETS — 100.0%

$222,968,767 

FUTURES CONTRACTS PURCHASED
Reference EntityContractsExpiration DateNotional
Amount
Unrealized
Appreciation
(Depreciation)^
U.S. Treasury 2-Year Notes87December 2022$17,868,985 $(29,386)
^Amount represents value and unrealized appreciation (depreciation).

FUTURES CONTRACTS SOLD
Reference EntityContractsExpiration DateNotional
Amount
Unrealized
Appreciation
(Depreciation)^
U.S. Treasury 5-Year Notes4December 2022$430,031 $47 
U.S. Treasury 10-Year Notes1December 2022112,063 701 
U.S. Treasury 10-Year Ultra Notes3December 2022355,453 11,526 
$897,547 $12,274 
^Amount represents value and unrealized appreciation (depreciation).


9


NOTES TO SCHEDULE OF INVESTMENTS
FHLB-Federal Home Loan Bank
FHLMC-Federal Home Loan Mortgage Corporation
FNMA-Federal National Mortgage Association
GNMA-Government National Mortgage Association
H15T1Y-Constant Maturity U.S. Treasury Note Yield Curve Rate Index
LIBOR-London Interbank Offered Rate
SEQ-Sequential Payer
USBMMY-U.S. Treasury Bill Money Market Yield
VRN-Variable Rate Note. The rate adjusts periodically based upon the terms set forth in the security’s offering documents. The rate shown is effective at the period end and the reference rate and spread, if any, is indicated. The security's effective maturity date may be shorter than the final maturity date shown.
Category is less than 0.05% of total net assets.
(1)Security, or a portion thereof, has been pledged at the custodian bank or with a broker for collateral requirements on futures contracts. At the period end, the aggregate value of securities pledged was $374,666.
(2)Security was purchased pursuant to Rule 144A or Section 4(2) under the Securities Act of 1933 and may be sold in transactions exempt from registration, normally to qualified institutional investors. The aggregate value of these securities at the period end was $4,083,424, which represented 1.8% of total net assets.
(3)The rate indicated is the yield to maturity at purchase for non-interest bearing securities. For interest bearing securities, the stated coupon rate is shown.


See Notes to Financial Statements.
10


Statement of Assets and Liabilities
SEPTEMBER 30, 2022 (UNAUDITED)
Assets
Investment securities, at value (cost of $229,457,970)$223,133,926 
Receivable for investments sold12,660 
Receivable for capital shares sold78,842 
Interest receivable573,982 
223,799,410 
Liabilities
Payable for investments purchased585,295 
Payable for capital shares redeemed135,049 
Payable for variation margin on futures contracts9,960 
Accrued management fees91,117 
Distribution and service fees payable4,677 
Dividends payable4,545 
830,643 
Net Assets$222,968,767 
Net Assets Consist of:
Capital paid in$235,016,419 
Distributable earnings(12,047,652)
$222,968,767 

Net AssetsShares OutstandingNet Asset Value Per Share*
Investor Class$143,092,10015,587,044$9.18
I Class$43,939,1674,789,966$9.17
A Class$6,106,470664,744$9.19
C Class$2,499,646279,998$8.93
R Class$3,707,490405,022$9.15
R5 Class$23,623,8942,572,855$9.18
*Maximum offering price per share was equal to the net asset value per share for all share classes, except Class A, for which the maximum offering price per share was $9.40 (net asset value divided by 0.9775). A contingent deferred sales charge may be imposed on redemptions of Class A and Class C.


See Notes to Financial Statements.
11


Statement of Operations
FOR THE SIX MONTHS ENDED SEPTEMBER 30, 2022 (UNAUDITED)
Investment Income (Loss)
Income:
Interest$2,291,632 
Expenses:
Management fees578,693 
Distribution and service fees:
A Class7,771 
C Class13,725 
R Class7,463 
Trustees' fees and expenses8,018 
Other expenses400 
616,070 
Net investment income (loss)1,675,562 
Realized and Unrealized Gain (Loss)
Net realized gain (loss) on:
Investment transactions(4,910,102)
Futures contract transactions213,888 
Swap agreement transactions676,327 
(4,019,887)
Change in net unrealized appreciation (depreciation) on:
Investments(1,670,663)
Futures contracts(183,329)
Swap agreements(766,986)
(2,620,978)
Net realized and unrealized gain (loss)(6,640,865)
Net Increase (Decrease) in Net Assets Resulting from Operations$(4,965,303)


See Notes to Financial Statements.
12


Statement of Changes in Net Assets
SIX MONTHS ENDED SEPTEMBER 30, 2022 (UNAUDITED) AND YEAR ENDED MARCH 31, 2022
Increase (Decrease) in Net Assets
September 30, 2022March 31, 2022
Operations
Net investment income (loss)$1,675,562 $968,420 
Net realized gain (loss)(4,019,887)(570,135)
Change in net unrealized appreciation (depreciation)(2,620,978)(6,138,862)
Net increase (decrease) in net assets resulting from operations(4,965,303)(5,740,577)
Distributions to Shareholders
From earnings:
Investor Class(1,065,944)(1,895,275)
I Class(364,290)(294,854)
A Class(36,590)(69,096)
C Class— (21,657)
R Class(6,382)(18,772)
R5 Class(221,341)(240,307)
Decrease in net assets from distributions(1,694,547)(2,539,961)
Capital Share Transactions
Net increase (decrease) in net assets from capital share transactions (Note 5)14,439,637 (52,684,820)
Net increase (decrease) in net assets7,779,787 (60,965,358)
Net Assets
Beginning of period215,188,980 276,154,338 
End of period$222,968,767 $215,188,980 


See Notes to Financial Statements.
13


Notes to Financial Statements

SEPTEMBER 30, 2022 (UNAUDITED)

1. Organization

American Century Government Income Trust (the trust) is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company and is organized as a Massachusetts business trust. Short-Term Government Fund (the fund) is one fund in a series issued by the trust. The fund’s investment objective is to seek high current income while maintaining safety of principal.

The fund offers the Investor Class, I Class, A Class, C Class, R Class and R5 Class. The A Class may incur an initial sales charge. The A Class and C Class may be subject to a contingent deferred sales charge.

2. Significant Accounting Policies

The following is a summary of significant accounting policies consistently followed by the fund in preparation of its financial statements. The fund is an investment company and follows accounting and reporting guidance in accordance with accounting principles generally accepted in the United States of America. This may require management to make certain estimates and assumptions at the date of the financial statements. Actual results could differ from these estimates. Management evaluated the impact of events or transactions occurring through the date the financial statements were issued that would merit recognition or disclosure.

Investment Valuations — The fund determines the fair value of its investments and computes its net asset value (NAV) per share at the close of regular trading (usually 4 p.m. Eastern time) on the New York Stock Exchange (NYSE) on each day the NYSE is open. The value of investments of the fund is determined by American Century Investment Management, Inc. (ACIM) (the investment advisor), as the valuation designee, pursuant to its valuation policies and procedures. The Board of Trustees oversees the valuation designee and reviews its valuation policies and procedures at least annually.

Fixed income securities are valued at the evaluated mean as provided by independent pricing services or at the mean of the most recent bid and asked prices as provided by investment dealers. U.S. Treasury, Government Agency and municipal securities are valued using market models that consider trade data, quotations from dealers and active market makers, relevant yield curve and spread data, creditworthiness, trade data or market information on comparable securities, and other relevant security specific information. Mortgage-related and asset-backed securities are valued based on models that consider trade data, prepayment and default projections, benchmark yield and spread data and estimated cash flows of each tranche of the issuer.

Open-end management investment companies are valued at the reported NAV per share. Repurchase agreements are valued at cost, which approximates fair value. Exchange-traded futures contracts are valued at the settlement price as provided by the appropriate exchange. Swap agreements are valued at an evaluated mean as provided by independent pricing services or independent brokers.

If the valuation designee determines that the market price for a portfolio security is not readily available or is believed by the valuation designee to be unreliable, such security is valued at fair value as determined in good faith by the valuation designee, in accordance with its policies and procedures. Circumstances that may cause the fund to determine that market quotations are not available or reliable include, but are not limited to: when there is a significant event subsequent to the market quotation; trading in a security has been halted during the trading day; or trading in a security is insufficient or did not take place due to a closure or holiday.

The valuation designee monitors for significant events occurring after the close of an investment’s primary exchange but before the fund’s NAV per share is determined. Significant events may include, but are not limited to: corporate announcements and transactions; regulatory news, governmental action and political unrest that could impact a specific investment or an investment sector; or armed conflicts, natural disasters and similar events that could affect investments in a specific country or region.

Security Transactions — Security transactions are accounted for as of the trade date. Net realized gains and losses are determined on the identified cost basis, which is also used for federal income tax purposes.

14


Investment Income — Interest income is recorded on the accrual basis and includes paydown gain (loss) and accretion of discounts and amortization of premiums. Inflation adjustments related to inflation-linked debt securities are reflected as interest income.

Repurchase Agreements — The fund may enter into repurchase agreements with institutions that ACIM has determined are creditworthy pursuant to criteria adopted by the Board of Trustees. The fund requires that the collateral, represented by securities, received in a repurchase transaction be transferred to the custodian in a manner sufficient to enable the fund to obtain those securities in the event of a default under the repurchase agreement. ACIM monitors, on a daily basis, the securities transferred to ensure the value, including accrued interest, of the securities under each repurchase agreement is equal to or greater than amounts owed to the fund under each repurchase agreement.

Joint Trading Account — Pursuant to an Exemptive Order issued by the Securities and Exchange Commission, the fund, along with certain other funds in the American Century Investments family of funds, may transfer uninvested cash balances into a joint trading account. These balances are invested in one or more repurchase agreements that are collateralized by U.S. Treasury or Agency obligations.

Segregated Assets — In accordance with the 1940 Act, the fund segregates assets on its books and records to cover certain types of investment securities and other financial instruments. ACIM monitors, on a daily basis, the securities segregated to ensure the fund designates a sufficient amount of liquid assets, marked-to-market daily. The fund may also receive assets or be required to pledge assets at the custodian bank or with a broker for collateral requirements.

Income Tax Status — It is the fund’s policy to distribute substantially all net investment income and net realized gains to shareholders and to otherwise qualify as a regulated investment company under provisions of the Internal Revenue Code. Accordingly, no provision has been made for income taxes. The fund files U.S. federal, state, local and non-U.S. tax returns as applicable. The fund's tax returns are subject to examination by the relevant taxing authority until expiration of the applicable statute of limitations, which is generally three years from the date of filing but can be longer in certain jurisdictions. At this time, management believes there are no uncertain tax positions which, based on their technical merit, would not be sustained upon examination and for which it is reasonably possible that the total amounts of unrecognized tax benefits will significantly change in the next twelve months.

Multiple Class — All shares of the fund represent an equal pro rata interest in the net assets of the class to which such shares belong, and have identical voting, dividend, liquidation and other rights and the same terms and conditions, except for class specific expenses and exclusive rights to vote on matters affecting only individual classes. Income, non-class specific expenses, and realized and unrealized capital gains and losses of the fund are allocated to each class of shares based on their relative net assets.

Distributions to Shareholders — Distributions from net investment income, if any, are declared daily and paid monthly. Distributions from net realized gains, if any, are generally declared and paid annually.

Indemnifications — Under the trust’s organizational documents, its officers and trustees are indemnified against certain liabilities arising out of the performance of their duties to the fund. In addition, in the normal course of business, the fund enters into contracts that provide general indemnifications. The maximum exposure under these arrangements is unknown as this would involve future claims that may be made against a fund. The risk of material loss from such claims is considered by management to be remote.

3. Fees and Transactions with Related Parties

Certain officers and trustees of the trust are also officers and/or directors of American Century Companies, Inc. (ACC). The trust's investment advisor, ACIM, the trust's distributor, American Century Investment Services, Inc. (ACIS), and the trust's transfer agent, American Century Services, LLC, are wholly owned, directly or indirectly, by ACC.

15


Management Fees — The trust has entered into a management agreement with ACIM, under which ACIM provides the fund with investment advisory and management services in exchange for a single, unified management fee (the fee) per class. The agreement provides that ACIM will pay all expenses of managing and operating the fund, except brokerage expenses, taxes, interest, fees and expenses of the independent trustees (including legal counsel fees), extraordinary expenses, and expenses incurred in connection with the provision of shareholder services and distribution services under a plan adopted pursuant to Rule 12b-1 under the 1940 Act. The fee is computed and accrued daily based on each class’s daily net assets and paid monthly in arrears. The difference in the fee among the classes is a result of their separate arrangements for non-Rule 12b-1 shareholder services. It is not the result of any difference in advisory or custodial fees or other expenses related to the management of the fund’s assets, which do not vary by class. The fee consists of (1) an Investment Category Fee based on the daily net assets of the fund and certain other accounts managed by the investment advisor that are in the same broad investment category as the fund and (2) a Complex Fee based on the assets of all funds in the American Century Investments family of funds that have the same investment advisor and distributor as the fund. For purposes of determining the Investment Category Fee and Complex Fee, the assets of funds managed by the investment advisor that invest exclusively in the shares of other funds (funds of funds) are not included.

The Investment Category Fee range, the Complex Fee range and the effective annual management fee for each class for the period ended September 30, 2022 are as follows:
Investment Category Fee RangeComplex Fee
Range
Effective Annual Management Fee
Investor Class
0.2425%
to 0.3600%
0.2500% to 0.3100%0.54%
I Class0.1500% to 0.2100%0.44%
A Class0.2500% to 0.3100%0.54%
C Class0.2500% to 0.3100%0.54%
R Class0.2500% to 0.3100%0.54%
R5 Class0.0500% to 0.1100%0.34%

Distribution and Service Fees — The Board of Trustees has adopted a separate Master Distribution and Individual Shareholder Services Plan for each of the A Class, C Class and R Class (collectively the plans), pursuant to Rule 12b-1 of the 1940 Act. The plans provide that the A Class will pay ACIS an annual distribution and service fee of 0.25%. The plans provide that the C Class will pay ACIS an annual distribution and service fee of 1.00%, of which 0.25% is paid for individual shareholder services and 0.75% is paid for distribution services. The plans provide that the R Class will pay ACIS an annual distribution and service fee of 0.50%. The fees are computed and accrued daily based on each class’s daily net assets and paid monthly in arrears. The fees are used to pay financial intermediaries for distribution and individual shareholder services. Fees incurred under the plans during the period ended September 30, 2022 are detailed in the Statement of Operations.

Trustees’ Fees and Expenses — The Board of Trustees is responsible for overseeing the investment advisor’s management and operations of the fund. The trustees receive detailed information about the fund and its investment advisor regularly throughout the year, and meet at least quarterly with management of the investment advisor to review reports about fund operations. The fund’s officers do not receive compensation from the fund.

Interfund Transactions — The fund may enter into security transactions with other American Century Investments funds and other client accounts of the investment advisor, in accordance with the 1940 Act rules and procedures adopted by the Board of Trustees. The rules and procedures require, among other things, that these transactions be effected at the independent current market price of the security. There were no interfund transactions during the period.

4. Investment Transactions

Purchases of investment securities, excluding short-term investments, for the period ended September 30, 2022 totaled $214,716,553, of which $213,167,724 represented U.S. Treasury and Government Agency obligations.

Sales of investment securities, excluding short-term investments, for the period ended September 30, 2022 totaled $231,134,175, of which $224,769,426 represented U.S. Treasury and Government Agency obligations.

16


5. Capital Share Transactions

Transactions in shares of the fund were as follows (unlimited number of shares authorized):
Six months ended
September 30, 2022
Year ended
March 31, 2022
SharesAmountSharesAmount
Investor Class
Sold1,197,368 $11,180,970 3,194,580 $31,078,723 
Issued in reinvestment of distributions111,604 1,040,417 191,192 1,854,928 
Redeemed(1,891,629)(17,672,490)(7,378,284)(71,803,452)
(582,657)(5,451,103)(3,992,512)(38,869,801)
I Class
Sold5,326,447 49,945,008 2,142,694 20,842,874 
Issued in reinvestment of distributions39,100 364,287 30,313 294,503 
Redeemed(2,520,352)(23,483,861)(4,000,946)(39,036,310)
2,845,195 26,825,434 (1,827,939)(17,898,933)
A Class
Sold85,771 799,057 198,458 1,928,092 
Issued in reinvestment of distributions3,810 35,531 7,110 68,980 
Redeemed(143,306)(1,350,179)(595,365)(5,791,946)
(53,725)(515,591)(389,797)(3,794,874)
C Class
Sold43,924 399,903 129,156 1,232,441 
Issued in reinvestment of distributions— — 2,301 21,657 
Redeemed(46,364)(418,346)(92,818)(870,402)
(2,440)(18,443)38,639 383,696 
R Class
Sold184,547 1,709,299 165,061 1,589,453 
Issued in reinvestment of distributions693 6,369 1,949 18,772 
Redeemed(108,966)(1,017,544)(163,077)(1,578,876)
76,274 698,124 3,933 29,349 
R5 Class
Sold211,129 1,963,556 2,604,732 25,140,648 
Issued in reinvestment of distributions23,719 221,341 24,788 240,307 
Redeemed(993,954)(9,283,681)(1,842,790)(17,915,212)
(759,106)(7,098,784)786,730 7,465,743 
Net increase (decrease)1,523,541 $14,439,637 (5,380,946)$(52,684,820)

6. Fair Value Measurements

The fund’s investments valuation process is based on several considerations and may use multiple inputs to determine the fair value of the investments held by the fund. In conformity with accounting principles generally accepted in the United States of America, the inputs used to determine a valuation are classified into three broad levels.

Level 1 valuation inputs consist of unadjusted quoted prices in an active market for identical investments.

Level 2 valuation inputs consist of direct or indirect observable market data (including quoted prices for comparable investments, evaluations of subsequent market events, interest rates, prepayment speeds, credit risk, etc.). These inputs also consist of quoted prices for identical investments initially expressed in local currencies that are adjusted through translation into U.S. dollars.

Level 3 valuation inputs consist of unobservable data (including a fund’s own assumptions).

17


The level classification is based on the lowest level input that is significant to the fair valuation measurement. The valuation inputs are not necessarily an indication of the risks associated with investing in these securities or other financial instruments.

The following is a summary of the level classifications as of period end. The Schedule of Investments provides additional information on the fund’s portfolio holdings.
Level 1Level 2Level 3
Assets
Investment Securities
U.S. Treasury Securities— $142,453,712 — 
Collateralized Mortgage Obligations— 18,614,579 — 
Asset-Backed Securities— 11,155,959 — 
U.S. Government Agency Securities— 9,628,465 — 
U.S. Government Agency Mortgage-Backed Securities— 3,266,038 — 
Short-Term Investments$18,071 37,997,102 — 
$18,071 $223,115,855 — 
Other Financial Instruments
Futures Contracts$12,274 — — 
Liabilities
Other Financial Instruments
Futures Contracts$29,386 — — 

7. Derivative Instruments

Interest Rate Risk — The fund is subject to interest rate risk in the normal course of pursuing its investment objectives. The value of bonds generally declines as interest rates rise. A fund may enter into futures contracts based on a bond index or a specific underlying security. A fund may purchase futures contracts to gain exposure to increases in market value or sell futures contracts to protect against a decline in market value. Upon entering into a futures contract, a fund will segregate cash, cash equivalents or other appropriate liquid securities on its records in amounts sufficient to meet requirements. Subsequent payments (variation margin) are made or received daily, in cash, by a fund. The variation margin is equal to the daily change in the contract value and is recorded as unrealized gains and losses. A fund recognizes a realized gain or loss when the futures contract is closed or expires. Net realized and unrealized gains or losses occurring during the holding period of futures contracts are a component of net realized gain (loss) on futures contract transactions and change in net unrealized appreciation (depreciation) on futures contracts, respectively. One of the risks of entering into futures contracts is the possibility that the change in value of the contract may not correlate with the changes in value of the underlying securities. The fund's average notional exposure to interest rate risk derivative instruments held during the period was $7,226,684 futures contracts purchased and $4,941,254 futures contracts sold.

Other Contracts — A fund may enter into total return swap agreements in order to attempt to obtain or preserve a particular return or spread at a lower cost than obtaining a return or spread through purchases and/or sales of instruments in other markets or gain exposure to certain markets in the most economical way possible. A fund will segregate cash, cash equivalents or other appropriate liquid securities on its records in amounts sufficient to meet requirements. Changes in value, including the periodic amounts of interest to be paid or received on swap agreements, are recorded as unrealized appreciation (depreciation) on swap agreements. Upon entering into a centrally cleared swap, a fund is required to deposit cash or securities (initial margin) with a financial intermediary in an amount equal to a certain percentage of the notional amount. Subsequent payments (variation margin) are made or received daily, in cash, by a fund. The variation margin is equal to the daily change in the value and is a component of unrealized gains and losses. Realized gain or loss is recorded upon receipt or payment of a periodic settlement or termination of swap agreements. Net realized and unrealized gains or losses occurring during the holding period of swap agreements are a component of net realized gain (loss) on swap agreement transactions and change in net unrealized appreciation (depreciation) on swap agreements, respectively. The risks of entering into swap agreements include the possible lack of liquidity, failure of the counterparty to meet its obligations, and that there may be unfavorable changes in the underlying investments or instruments, including inflationary risk. The fund's average notional amount held during the period was $7,000,000.
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Value of Derivative Instruments as of September 30, 2022
Asset DerivativesLiability Derivatives
Type of Risk ExposureLocation on Statement of Assets and LiabilitiesValueLocation on Statement of Assets and LiabilitiesValue
Interest Rate RiskReceivable for variation margin on futures contracts*— Payable for variation margin on futures contracts*$9,960 
*Included in the unrealized appreciation (depreciation) on futures contracts, as reported in the Schedule of Investments.

Effect of Derivative Instruments on the Statement of Operations for the Six Months Ended September 30, 2022
Net Realized Gain (Loss)Change in Net Unrealized Appreciation (Depreciation)
Type of Risk ExposureLocation on Statement of OperationsValueLocation on Statement of OperationsValue
Interest Rate RiskNet realized gain (loss) on futures contract transactions$213,888 Change in net unrealized appreciation (depreciation) on futures contracts$(183,329)
Other ContractsNet realized gain (loss) on swap agreement transactions676,327 Change in net unrealized appreciation (depreciation) on swap agreements(766,986)
$890,215 $(950,315)

8. Risk Factors

The value of the fund’s shares will go up and down, sometimes rapidly or unpredictably, based on the performance of the securities owned by the fund and other factors generally affecting the securities market. Market risks, including political, regulatory, economic and social developments, can affect the value of the fund’s investments. Natural disasters, public health emergencies, war, terrorism and other unforeseeable events may lead to increased market volatility and may have adverse long-term effects on world economies and markets generally.

The fund may invest in instruments that have variable or floating coupon rates based on the London Interbank Offered Rate (LIBOR). LIBOR is a benchmark interest rate intended to be representative of the rate at which certain major international banks lend to one another over short-terms. Financial institutions have started the process of phasing out LIBOR and the transition process to a replacement rate may lead to increased volatility or illiquidity in markets for instruments that rely on LIBOR. This could result in a change to the value of such instruments or a change in the cost of temporary borrowing for the fund.

The fund’s investment process may result in high portfolio turnover, which could mean high transaction costs, affecting both performance and capital gains tax liabilities to investors.

9. Federal Tax Information

The book-basis character of distributions made during the year from net investment income or net realized gains may differ from their ultimate characterization for federal income tax purposes. These differences reflect the differing character of certain income items and net realized gains and losses for financial statement and tax purposes, and may result in reclassification among certain capital accounts on the financial statements.

As of period end, the components of investments for federal income tax purposes were as follows:
Federal tax cost of investments$230,227,682 
Gross tax appreciation of investments$24,259 
Gross tax depreciation of investments(7,118,015)
Net tax appreciation (depreciation) of investments$(7,093,756)

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The difference between book-basis and tax-basis unrealized appreciation (depreciation) is attributable primarily to the tax deferral of losses on wash sales.

As of March 31, 2022, the fund had post-October capital loss deferrals of $(871,328), which represent certain qualified losses that the fund has elected to treat as having been incurred in the following fiscal year for federal income tax purposes.
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Financial Highlights
For a Share Outstanding Throughout the Years Ended March 31 (except as noted)
Per-Share DataRatios and Supplemental Data
Income From Investment Operations:Distributions From:Ratio to Average Net Assets of:
Net Asset
Value,
Beginning
of Period
Net
Investment
Income
(Loss)(1)
Net
Realized
and
Unrealized
Gain (Loss)
Total From
Investment
Operations
Net
Investment
Income
Net
Realized
Gains
Total
Distributions
Net Asset
Value, End
of Period
Total
Return(2)
Operating
Expenses
Net
Investment
Income
(Loss)
Portfolio
Turnover
Rate
Net Assets,
End of Period
(in thousands)
Investor Class
2022(3)
$9.450.07(0.27)(0.20)(0.07)(0.07)$9.18(2.16)%
0.55%(4)
1.41%(4)
99%$143,092 
2022$9.810.04(0.30)(0.26)(0.04)(0.06)(0.10)$9.45(2.61)%0.54%0.40%229%$152,845 
2021$9.750.030.080.11(0.05)(0.05)$9.811.09%0.55%0.27%162%$197,813 
2020$9.480.140.280.42(0.15)(0.15)$9.754.48%0.55%1.47%206%$213,672 
2019$9.450.170.040.21(0.18)(0.18)$9.482.25%0.55%1.81%128%$159,683 
2018$9.580.10(0.12)(0.02)(0.11)(0.11)$9.45(0.17)%0.55%1.05%101%$169,819 
I Class
2022(3)
$9.440.07(0.27)(0.20)(0.07)(0.07)$9.17(2.12)%
0.45%(4)
1.51%(4)
99%$43,939 
2022$9.800.05(0.30)(0.25)(0.05)(0.06)(0.11)$9.44(2.51)%0.44%0.50%229%$18,367 
2021$9.750.030.080.11(0.06)(0.06)$9.801.09%0.45%0.37%162%$36,987 
2020$9.480.140.290.43(0.16)(0.16)$9.754.59%0.45%1.57%206%$23,045 
2019$9.450.180.040.22(0.19)(0.19)$9.482.35%0.45%1.91%128%$3,347 
2018(5)
$9.580.12(0.13)(0.01)(0.12)(0.12)$9.45(0.11)%
0.45%(4)
1.26%(4)
101%(6)
$2,691 



For a Share Outstanding Throughout the Years Ended March 31 (except as noted)
Per-Share DataRatios and Supplemental Data
Income From Investment Operations:Distributions From:Ratio to Average Net Assets of:
Net Asset
Value,
Beginning
of Period
Net
Investment
Income
(Loss)(1)
Net
Realized
and
Unrealized
Gain (Loss)
Total From
Investment
Operations
Net
Investment
Income
Net
Realized
Gains
Total
Distributions
Net Asset
Value, End
of Period
Total
Return(2)
Operating
Expenses
Net
Investment
Income
(Loss)
Portfolio
Turnover
Rate
Net Assets,
End of Period
(in thousands)
A Class
2022(3)
$9.460.05(0.27)(0.22)(0.05)(0.05)$9.19(2.28)%
0.80%(4)
1.16%(4)
99%$6,106 
2022$9.810.01(0.29)(0.28)(0.01)(0.06)(0.07)$9.46(2.78)%0.79%0.15%229%$6,795 
2021$9.76
(7)
0.070.07(0.02)(0.02)$9.810.75%0.80%0.02%162%$10,876 
2020$9.480.110.300.41(0.13)(0.13)$9.764.33%0.80%1.22%206%$8,987 
2019$9.450.140.050.19(0.16)(0.16)$9.481.99%0.80%1.56%128%$5,293 
2018$9.590.08(0.13)(0.05)(0.09)(0.09)$9.45(0.53)%0.80%0.80%101%$8,897 
C Class
2022(3)
$9.170.02(0.26)(0.24)$8.93(2.62)%
1.55%(4)
0.41%(4)
99%$2,500 
2022$9.58(0.06)(0.29)(0.35)
(7)
(0.06)(0.06)$9.17(3.62)%1.54%(0.60)%229%$2,591 
2021$9.57(0.07)0.080.01
(7)
(7)
$9.580.11%1.55%(0.73)%162%$2,335 
2020$9.290.050.270.32(0.04)(0.04)$9.573.46%1.55%0.47%206%$2,991 
2019$9.180.090.020.11
(7)
(7)
$9.291.20%1.55%0.81%128%$2,679 
2018$9.29
(7)
(0.11)(0.11)$9.18(1.18)%1.55%0.05%101%$585 
R Class
2022(3)
$9.400.04(0.27)(0.23)(0.02)(0.02)$9.15(2.46)%
1.05%(4)
0.91%(4)
99%$3,707 
2022$9.76(0.01)(0.29)(0.30)
(7)
(0.06)(0.06)$9.40(3.04)%1.04%(0.10)%229%$3,090 
2021$9.72(0.03)0.080.05(0.01)(0.01)$9.760.52%1.05%(0.23)%162%$3,172 
2020$9.440.070.310.38(0.10)(0.10)$9.724.09%1.05%0.97%206%$1,995 
2019$9.410.130.030.16(0.13)(0.13)$9.441.74%1.05%1.31%128%$301 
2018$9.550.04(0.11)(0.07)(0.07)(0.07)$9.41(0.78)%1.05%0.55%101%$178 



For a Share Outstanding Throughout the Years Ended March 31 (except as noted)
Per-Share DataRatios and Supplemental Data
Income From Investment Operations:Distributions From:Ratio to Average Net Assets of:
Net Asset
Value,
Beginning
of Period
Net
Investment
Income
(Loss)(1)
Net
Realized
and
Unrealized
Gain (Loss)
Total From
Investment
Operations
Net
Investment
Income
Net
Realized
Gains
Total
Distributions
Net Asset
Value, End
of Period
Total
Return(2)
Operating
Expenses
Net
Investment
Income
(Loss)
Portfolio
Turnover
Rate
Net Assets,
End of Period
(in thousands)
R5 Class
2022(3)
$9.450.07(0.26)(0.19)(0.08)(0.08)$9.18(2.07)%
0.35%(4)
1.61%(4)
99%$23,624 
2022$9.810.06(0.30)(0.24)(0.06)(0.06)(0.12)$9.45(2.41)%0.34%0.60%229%$31,501 
2021$9.750.050.080.13(0.07)(0.07)$9.811.29%0.35%0.47%162%$24,972 
2020$9.480.160.280.44(0.17)(0.17)$9.754.69%0.35%1.67%206%$25,528 
2019$9.450.190.040.23(0.20)(0.20)$9.482.45%0.35%2.01%128%$23,847 
2018$9.590.12(0.13)(0.01)(0.13)(0.13)$9.45(0.08)%0.35%1.25%101%$19,730 

Notes to Financial Highlights
(1)Computed using average shares outstanding throughout the period.
(2)Total returns are calculated based on the net asset value of the last business day and do not reflect applicable sales charges, if any. Total returns for periods less than one year are not annualized.
(3)Six months ended September 30, 2022 (unaudited).
(4)Annualized.
(5)April 10, 2017 (commencement of sale) through March 31, 2018.
(6)Portfolio turnover is calculated at the fund level. Percentage indicated was calculated for the year ended March 31, 2018.
(7)Per-share amount was less than $0.005.


See Notes to Financial Statements.



Approval of Management Agreement

At a meeting held on June 21, 2022, the Fund’s Board of Trustees (the "Board") unanimously approved the renewal of the management agreement pursuant to which American Century Investment Management, Inc. (the “Advisor”) acts as the investment advisor for the Fund. Under Section 15(c) of the Investment Company Act of 1940 (the “Investment Company Act”), contracts for investment advisory services are required to be reviewed, evaluated, and approved by a majority of a fund’s Trustees, including a majority of the independent Trustees, each year. The Board regards this annual evaluation and renewal as one of its most important responsibilities.

The independent Trustees have memorialized a statement regarding the relationship between their ongoing obligations to oversee and evaluate the performance of the Advisor and their annual consideration of renewal of the management agreement. In that statement, the independent Trustees noted that their assessment of the Advisor’s performance is an ongoing process that takes place over the entire year and is informed by all of the extensive information that the Board and its committees receive and consider over time. This information, together with the additional materials provided specifically in connection with the review, are central to the Board’s assessment of the Advisor’s performance and its determination whether to renew the Fund’s management agreement.

Prior to its consideration of the renewal of the management agreement, the Board requested and reviewed data and analysis relating to the proposed renewal. This information and analysis was compiled by the Advisor and certain independent providers of evaluation data concerning the Fund.

In connection with its consideration of the renewal of the management agreement, the Board’s review and evaluation of the services provided by the Advisor and its affiliates included, but was not limited to, the following:

the nature, extent, and quality of investment management, shareholder services, and other services provided and to be provided to the Fund including without limitation portfolio management and trading services, shareholder and intermediary service levels and quality, compliance and legal services, fund accounting and financial reporting, and fund share distribution;
the wide range of other programs and services provided by the Advisor and its affiliates to the Fund and its shareholders on a routine and non-routine basis;
the Fund’s investment performance, including data comparing the Fund’s performance to appropriate benchmarks and/or a peer group of other mutual funds with similar investment objectives and strategies;
the cost of owning the Fund compared to the cost of owning similarly-managed funds;
the compliance policies, procedures, and regulatory experience of the Advisor and its affiliates and certain other Fund service providers;
financial data showing the cost of services provided by the Advisor and its affiliates to the Fund, the profitability of the Fund to the Advisor, and the overall profitability of the Advisor;
the Advisor’s strategic plans, generally, and with respect to the ongoing impact of the COVID-19 pandemic response, heightened areas of interest in the mutual fund industry and recent geopolitical issues;
the Advisor’s business continuity plans, vendor management practices, and cyber security practices;
any economies of scale associated with the Advisor’s management of the Fund;
services provided and charges to the Advisor’s other investment management clients;
fees and expenses associated with any investment by the Fund in other funds;
payments and practices in connection with financial intermediaries holding shares of the Fund on behalf of their clients and the services provided by intermediaries in connection therewith; and
any collateral benefits derived by the Advisor from the management of the Fund.
24


In keeping with its practice, the Board held two meetings and the independent Trustees met in private session to discuss the renewal and to review and discuss the information provided in response to their request. The Board held active discussions with the Advisor regarding the renewal of the management agreement. The independent Trustees had the benefit of the advice of their independent counsel throughout the process.

Factors Considered

The Trustees considered all of the information provided by the Advisor, the independent data providers, and the independent Trustees’ independent counsel in connection with the approval. They determined that the information was sufficient for them to evaluate the management agreement for the Fund. In connection with their review, the Trustees did not identify any single factor as being all-important or controlling and each Trustee may have attributed different levels of importance to different factors. In deciding to renew the management agreement, the Board based its decision on a number of factors, including the following:

Nature, Extent and Quality of Services — Generally. Under the management agreement, the Advisor is responsible for providing or arranging for all services necessary for the operation of the Fund. The Board noted that the Advisor provides or arranges at its own expense a wide variety of services including:

constructing and designing the Fund
portfolio research and security selection
initial capitalization/funding
securities trading
Fund administration
custody of Fund assets
daily valuation of the Fund’s portfolio
shareholder servicing and transfer agency, including shareholder confirmations, recordkeeping, and communications
legal services (except the independent Trustees’ counsel)
regulatory and portfolio compliance
financial reporting
marketing and distribution (except amounts paid by the Fund under Rule 12b-1 plans)

The Board noted that many of these services have expanded over time in terms of both quantity and complexity in response to shareholder demands, competition in the industry, changing distribution channels, and the changing regulatory environment.

Investment Management Services. The nature of the investment management services provided to the Fund is quite complex and allows Fund shareholders access to professional money management, instant diversification of their investments within an asset class, the opportunity to easily diversify among asset classes by investing in or exchanging among various American Century Investments funds, and liquidity. In evaluating investment performance, the Board expects the Advisor to manage the Fund in accordance with its investment objectives and principal investment strategies. Further, the Trustees recognize that the Advisor has an obligation to seek the best execution of fund trades. In providing these services, the Advisor utilizes teams of investment professionals (portfolio managers, analysts, research assistants, and securities traders) who require extensive information technology, research, training, compliance, and other systems to conduct their business. The Board, directly and through its Portfolio Committee, regularly reviews investment performance information for the Fund, together with comparative information for appropriate benchmarks and/or peer groups of similarly-managed funds, over different time horizons. The Trustees also review investment performance information during the management agreement renewal process. If performance concerns are identified, the Fund receives special reviews until performance improves, during which the Board discusses with the Advisor the reasons for such results (e.g., market conditions, security selection) and any actions being taken to improve performance. The Fund’s performance was above its benchmark for the one-, three-, five-, and ten-year periods reviewed by the Board. The Board discussed the Fund’s performance with the
25


Advisor and was satisfied with the efforts being undertaken by the Advisor. The Board found the investment management services provided by the Advisor to the Fund to be satisfactory and consistent with the management agreement.

Shareholder and Other Services. Under the management agreement, the Advisor, either directly or through affiliates or third parties, provides the Fund with a comprehensive package of transfer agency, shareholder, and other services. The Board, directly and through its various committees, regularly reviews reports and evaluations of such services at its regular meetings. These reports include, but are not limited to, information regarding the operational efficiency and accuracy of the shareholder and transfer agency services provided, staffing levels, shareholder satisfaction, technology support (including cyber security), new products and services offered to Fund shareholders, securities trading activities, portfolio valuation services, auditing services, and legal and operational compliance activities. The Board found the services provided by the Advisor to the Fund under the management agreement to be competitive and of high quality.

Costs of Services and Profitability. The Advisor provides detailed information concerning its cost of providing various services to the Fund, its profitability in managing the Fund, its overall profitability, and its financial condition. The Trustees have reviewed with the Advisor the methodology used to prepare this financial information. This information is considered in evaluating the Advisor’s financial condition, its ability to continue to provide services under the management agreement, and the reasonableness of the current management fee. The Board concluded that the Advisor’s profits were reasonable in light of the services provided to the Fund.

Ethics. The Board generally considers the Advisor’s commitment to providing quality services to shareholders and to conducting its business ethically. They noted that the Advisor’s practices generally meet or exceed industry best practices.

Economies of Scale. The Board also reviewed information provided by the Advisor regarding the possible existence of economies of scale in connection with the management of the Fund. The Board concluded that economies of scale are difficult to measure and predict with precision, especially on a fund-by-fund basis. The Board concluded that the Advisor is appropriately sharing economies of scale, to the extent they exist, through its fee structure and through reinvestment in its business, infrastructure, investment capabilities and initiatives to provide shareholders enhanced and expanded services.

Comparison to Other Funds’ Fees. The management agreement provides that the Fund pays the Advisor a single, all-inclusive (or unified) management fee for providing all services necessary for the management and operation of the Fund, other than securities transaction expenses, taxes, interest, extraordinary expenses, fees and expenses of the Fund’s independent Trustees (including their independent legal counsel), and expenses incurred in connection with the provision of shareholder services and distribution services under a plan adopted pursuant to Rule 12b-1 under the Investment Company Act. Under this unified fee structure, the Advisor is responsible for providing all investment advisory, custody, audit, administrative, compliance, recordkeeping, marketing, and shareholder services, or arranging and supervising third parties to provide such services. By contrast, most other funds are charged a variety of fees, including an investment advisory fee, a transfer agency fee, an administrative fee, and other expenses. Other than their investment advisory fees and any applicable Rule 12b-1 distribution fees, all other components of the total fees charged by these other funds may be increased without shareholder approval. The Board believes the unified fee structure is a benefit to Fund shareholders because it clearly discloses to shareholders the cost of owning Fund shares, and, since the unified fee cannot be increased without a vote of Fund shareholders, it shifts to the Advisor the risk of increased costs of operating the Fund and provides a direct incentive to minimize administrative inefficiencies. Part of the Board’s analysis of fee levels involves reviewing certain evaluative data compiled by an independent provider and comparing the Fund’s unified fee to the total expense ratio of peer funds. The unified fee charged to shareholders of the Fund was the lowest of the total expense ratios of the Fund’s peer universe. The Board concluded that the management fee paid by the Fund to the
26


Advisor under the management agreement is reasonable in light of the services provided to the Fund.

Comparison to Fees and Services Provided to Other Clients of the Advisor. The Board also requested and received information from the Advisor concerning the nature of the services, fees, costs, and profitability of its advisory services to advisory clients other than the Fund. They observed that these varying types of client accounts require different services and involve different regulatory and entrepreneurial risks than the management of the Fund. The Board analyzed this information and concluded that the fees charged and services provided to the Fund were reasonable by comparison.

Payments to Intermediaries. The Trustees also requested and received a description of payments made to intermediaries by the Fund and the Advisor and services provided by intermediaries. These payments include various payments made by the Fund or the Advisor to different types of intermediaries and recordkeepers for distribution and service activities provided with respect to the Fund. The Trustees reviewed such information and received representations from the Advisor that all such payments by the Fund were made pursuant to the Fund’s Rule 12b-1 Plan and that all such payments by the Advisor were made from the Advisor’s resources and reasonable profits.

Collateral or “Fall-Out” Benefits Derived by the Advisor. The Board considered the possible existence of collateral benefits the Advisor may receive as a result of its relationship with the Fund. The Board noted that the Advisor’s primary business is managing funds and it generally does not use fund or shareholder information to generate profits in other lines of business, and therefore does not derive any significant collateral benefits from them. The Board noted that the Advisor may receive proprietary research from broker-dealers that execute fund portfolio transactions. The Board also determined that the Advisor is able to provide investment management services to certain clients other than the Fund, at least in part, due to its existing infrastructure built to serve the fund complex. The Board also noted that the assets of those other accounts are, where applicable, included with the assets of the Fund to determine breakpoints in the management fee schedule.

Existing Relationship. The Board also considered whether there was any reason for not continuing the existing arrangement with the Advisor. In this regard, the Board was mindful of the potential disruptions of the Fund’s operations and various risks, uncertainties, and other effects that could occur as a result of a decision not to continue such relationship. In particular, the Board recognized that most shareholders have invested in the Fund on the strength of the Advisor’s industry standing and reputation and in the expectation that the Advisor will have a continuing role in providing advisory services to the Fund.

Conclusion of the Trustees. As a result of this process, the Board, including all of the independent Trustees, taking into account all of the factors discussed above and the information provided by the Advisor and others in connection with its review and throughout the year, concluded that the terms of the management agreement are fair and reasonable and that the management fee charged to the Fund is reasonable in light of the services provided and that the management agreement between the Fund and the Advisor should be renewed for an additional one-year period.

27


Additional Information

Retirement Account Information

As required by law, distributions you receive from certain retirement accounts are subject to federal income tax withholding, unless you elect not to have withholding apply*. Tax will be withheld on the total amount withdrawn even though you may be receiving amounts that are not subject to withholding, such as nondeductible contributions. In such case, excess amounts of withholding could occur. You may adjust your withholding election so that a greater or lesser amount will be withheld.

If you don’t want us to withhold on this amount, you must notify us to not withhold the federal income tax. You may notify us in writing or in certain situations by telephone or through other electronic means. For systematic withdrawals, your withholding election will remain in effect until revoked or changed by filing a new election. You have the right to revoke your election at any time and change your withholding percentage for future distributions.

Remember, even if you elect not to have income tax withheld, you are liable for paying income tax on the taxable portion of your withdrawal. If you elect not to have income tax withheld or you don’t have enough income tax withheld, you may be responsible for payment of estimated tax. You may incur penalties under the estimated tax rules if your withholding and estimated tax payments are not sufficient. You can reduce or defer the income tax on a distribution by directly or indirectly rolling such distribution over to another IRA or eligible plan. You should consult your tax advisor for additional information.

State tax will be withheld if, at the time of your distribution, your address is within one of the mandatory withholding states and you have federal income tax withheld (or as otherwise required by state law). State taxes will be withheld from your distribution in accordance with the respective state rules.

*Some 403(b), 457 and qualified retirement plan distributions may be subject to 20% mandatory withholding, as they are subject to special tax and withholding rules.  Your plan administrator or plan sponsor is required to provide you with a special tax notice explaining those rules at the time you request a distribution.  If applicable, federal and/or state taxes may be withheld from your distribution amount.


Proxy Voting Policies

Descriptions of the principles and policies that the fund's investment advisor uses in exercising the voting rights associated with the securities purchased and/or held by the fund are available without charge, upon request, by calling 1-800-345-2021 or visiting American Century Investments’ website at americancentury.com/proxy. A description of the policies is also available on the Securities and Exchange Commission’s website at sec.gov. Information regarding how the investment advisor voted proxies relating to portfolio securities during the most recent 12-month period ended June 30 is available on americancentury.com/proxy. It is also available at sec.gov.


Quarterly Portfolio Disclosure

The fund files its complete schedule of portfolio holdings with the Securities and Exchange Commission (SEC) for the first and third quarters of each fiscal year as an exhibit to its reports on Form N-PORT. These portfolio holdings are available on the fund's website at americancentury.com and, upon request, by calling 1-800-345-2021. The fund’s Form N-PORT reports are available on the SEC’s website at sec.gov.

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Contact Usamericancentury.com
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Investor Services Representative1-800-345-2021
or 816-531-5575
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American Century Government Income Trust
Investment Advisor:
American Century Investment Management, Inc.
Kansas City, Missouri
This report and the statements it contains are submitted for the general information of our shareholders. The report is not authorized for distribution to prospective investors unless preceded or accompanied by an effective prospectus.
©2022 American Century Proprietary Holdings, Inc. All rights reserved.
CL-SAN-90812 2211



(b) None.


ITEM 2. CODE OF ETHICS.

Not applicable for semiannual report filings.


ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT.

Not applicable for semiannual report filings.


ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES.

Not applicable for semiannual report filings.


ITEM 5. AUDIT COMMITTEE OF LISTED REGISTRANTS.

Not applicable for semiannual report filings.


ITEM 6. INVESTMENTS.

(a) The schedule of investments is included as part of the report to stockholders filed under Item 1 of this Form.

(b) Not applicable.


ITEM 7. DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED-END MANAGEMENT INVESTMENT COMPANIES.

Not applicable.


ITEM 8. PORTFOLIO MANAGERS OF CLOSED-END MANAGEMENT INVESTMENT COMPANIES.

Not applicable.


ITEM 9. PURCHASES OF EQUITY SECURITIES BY CLOSED-END MANAGEMENT INVESTMENT COMPANY AND AFFILIATED PURCHASERS.

Not applicable.


ITEM 10. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS.

During the reporting period, there were no material changes to the procedures by which shareholders may recommend nominees to the registrant’s board.




ITEM 11. CONTROLS AND PROCEDURES.

(a) The registrant's principal executive officer and principal financial officer have concluded that the registrant's disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940) are effective based on their evaluation of these controls and procedures as of a date within 90 days of the filing date of this report.

(b) There were no changes in the registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the Investment Company Act of 1940) that occurred during the period covered by this report that have materially affected, or are reasonably likely to materially affect, the registrant's internal control over financial reporting.


ITEM 12. DISCLOSURE OF SECURITIES LENDING ACTIVITIES FOR CLOSED-END MANAGEMENT INVESTMENT COMPANIES.

Not applicable.


ITEM 13. EXHIBITS.

(a)(1) Not applicable for semiannual report filings.

(a)(2) Separate certifications by the registrant’s principal executive officer and principal financial officer, pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 and Rule 30a-2(a) under the Investment Company Act of 1940, are filed and attached hereto as EX-99.CERT.

(a)(3) Not applicable.

(a)(4) Not applicable.

(b) A certification by the registrant’s chief executive officer and chief financial officer, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, is furnished and attached hereto as EX- 99.906CERT.




SIGNATURES

    Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Registrant:American Century Government Income Trust
By:/s/ Patrick Bannigan
Name:Patrick Bannigan
Title:President
Date:November 23, 2022

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

By:/s/ Patrick Bannigan
Name:Patrick Bannigan
Title:President
(principal executive officer)
Date:November 23, 2022

By:/s/ R. Wes Campbell
Name:R. Wes Campbell
Title:Treasurer and
Chief Financial Officer
(principal financial officer)
Date:November 23, 2022