Coupon | Maturity Date | Face Amount ($000) | Market Value ($000) | |||
U.S. Government and Agency Obligations (92.1%) | ||||||
U.S. Government Securities (15.1%) | ||||||
1 | United States Treasury Inflation Indexed Bonds | 0.250% | 1/15/25 | 288,244 | 283,290 | |
1 | United States Treasury Note/Bond | 2.750% | 5/15/25 | 137,000 | 133,554 | |
1 | United States Treasury Note/Bond | 4.250% | 5/31/25 | 75,000 | 74,203 | |
United States Treasury Note/Bond | 3.125% | 8/15/25 | 30,000 | 29,236 | ||
United States Treasury Note/Bond | 5.000% | 9/30/25 | 50,000 | 49,875 | ||
2 | United States Treasury Note/Bond | 2.125% | 5/31/26 | 18,000 | 16,976 | |
United States Treasury Note/Bond | 4.125% | 6/15/26 | 11,000 | 10,802 | ||
United States Treasury Note/Bond | 4.500% | 4/15/27 | 99,800 | 98,802 | ||
696,738 | ||||||
Agency Bonds and Notes (43.0%) | ||||||
3 | Fannie Mae Interest Strip | 0.000% | 11/15/25 | 8,000 | 7,384 | |
3 | Fannie Mae Principal Strip | 0.000% | 11/15/30 | 7,000 | 5,077 | |
Federal Farm Credit Banks Funding Corp. | 0.680% | 3/9/26 | 275,000 | 253,097 | ||
Federal Home Loan Banks | 0.830% | 2/10/27 | 136,475 | 121,703 | ||
Federal Home Loan Banks | 0.850% | 2/17/27 | 100,000 | 89,165 | ||
Federal Home Loan Banks | 1.020% | 2/24/27 | 10,570 | 9,465 | ||
Federal Home Loan Banks | 0.900% | 2/26/27 | 105,695 | 94,297 | ||
Federal Home Loan Banks | 0.920% | 2/26/27 | 25,900 | 23,120 | ||
Federal Home Loan Banks | 1.115% | 2/26/27 | 49,145 | 44,119 | ||
Federal Home Loan Banks | 4.800% | 3/6/28 | 100,000 | 98,253 | ||
3 | Federal Home Loan Mortgage Corp. | 0.680% | 8/6/25 | 73,100 | 69,011 | |
3 | Federal Home Loan Mortgage Corp. | 4.160% | 8/28/25 | 52,950 | 52,150 | |
3 | Federal Home Loan Mortgage Corp. | 0.640% | 11/24/25 | 174,650 | 162,621 | |
3 | Federal Home Loan Mortgage Corp. | 0.700% | 12/30/25 | 194,850 | 180,880 | |
3 | Federal National Mortgage Assn. | 0.650% | 12/17/25 | 138,500 | 128,656 | |
3 | Federal National Mortgage Assn. | 0.650% | 12/17/25 | 180,495 | 167,666 | |
3 | Freddie Mac Principal Strips | 0.000% | 3/15/31 | 19,983 | 14,259 | |
Private Export Funding Corp. | 4.300% | 12/15/28 | 45,000 | 43,895 | ||
Resolution Funding Corp. Principal Strip | 0.000% | 1/15/30 | 394,377 | 295,548 | ||
Resolution Funding Corp. Principal Strip | 0.000% | 4/15/30 | 171,307 | 126,617 | ||
1,986,983 | ||||||
Conventional Mortgage-Backed Securities (27.7%) | ||||||
3,4 | Freddie Mac Gold Pool | 2.000% | 9/1/28–6/1/30 | 1,601 | 1,389 | |
3,4 | Freddie Mac Gold Pool | 2.500% | 11/1/28 | 24,669 | 23,537 | |
4,5 | Ginnie Mae | 6.500% | 6/15/54 | 93,750 | 94,585 | |
3,4 | UMBS Pool | 2.000% | 10/1/27–4/1/36 | 484,804 | 430,615 | |
3,4,5 | UMBS Pool | 2.500% | 1/1/28–4/1/37 | 238,075 | 218,115 | |
3,4,5 | UMBS Pool | 1.500% | 11/1/30–5/15/39 | 342,391 | 303,203 | |
3,4,5 | UMBS Pool | 3.000% | 1/1/33–5/15/39 | 46,142 | 42,538 | |
3,4,5 | UMBS Pool | 4.000% | 5/15/39–6/25/52 | 60,300 | 53,884 | |
3,4,5 | UMBS Pool | 4.500% | 5/15/39 | 6,500 | 6,278 |
Coupon | Maturity Date | Face Amount ($000) | Market Value ($000) | |||
3,4,5 | UMBS Pool | 5.000% | 5/15/39 | 10,000 | 9,811 | |
3,4,5 | UMBS Pool | 5.500% | 5/15/54 | 24,500 | 23,780 | |
3,4,5 | UMBS Pool | 6.500% | 5/15/54 | 73,600 | 74,129 | |
1,281,864 | ||||||
Nonconventional Mortgage-Backed Securities (6.3%) | ||||||
3,4 | Fannie Mae REMICS | 5.500% | 9/25/33 | 5,404 | 5,400 | |
3,4 | Fannie Mae REMICS | 2.000% | 5/25/45 | 8,653 | 7,809 | |
3,4 | Fannie Mae REMICS | 3.000% | 6/25/48 | 23,919 | 21,164 | |
3,4 | Fannie Mae REMICS | 4.500% | 8/25/49–10/25/49 | 72,361 | 68,639 | |
3,4 | Fannie Mae REMICS | 2.500% | 11/25/49 | 20,400 | 18,248 | |
3,4 | Freddie Mac REMICS | 3.000% | 9/15/32–11/25/48 | 71,682 | 63,935 | |
3,4 | Freddie Mac REMICS | 4.500% | 10/25/44–3/25/48 | 41,307 | 39,422 | |
3,4 | Freddie Mac REMICS | 2.500% | 9/25/48–12/25/48 | 18,711 | 15,710 | |
3,4 | Freddie Mac REMICS | 2.250% | 8/25/49 | 16,538 | 13,734 | |
4 | Ginnie Mae REMICS | 4.500% | 5/20/51 | 37,594 | 36,038 | |
290,099 | ||||||
Total U.S. Government and Agency Obligations (Cost $4,474,750) | 4,255,684 | |||||
Asset-Backed/Commercial Mortgage-Backed Securities (11.8%) | ||||||
3,4 | Freddie Mac Multifamily Structured Pass-Through Certificates Class A2 Series K057 | 2.570% | 7/25/26 | 20,900 | 19,806 | |
3,4 | Freddie Mac Multifamily Structured Pass-Through Certificates Class A2 Series K064 | 3.224% | 3/25/27 | 6,070 | 5,753 | |
3,4 | Freddie Mac Multifamily Structured Pass-Through Certificates Class A2 Series K065 | 3.243% | 4/25/27 | 19,438 | 18,393 | |
3,4 | Freddie Mac Multifamily Structured Pass-Through Certificates Class A2 Series K066 | 3.117% | 6/25/27 | 64,639 | 60,853 | |
3,4 | Freddie Mac Multifamily Structured Pass-Through Certificates Class A2 Series K067 | 3.194% | 7/25/27 | 22,013 | 20,717 | |
3,4,6 | Freddie Mac Multifamily Structured Pass-Through Certificates Class A2 Series K070 | 3.303% | 11/25/27 | 42,021 | 39,505 | |
3,4 | Freddie Mac Multifamily Structured Pass-Through Certificates Class A2 Series K071 | 3.286% | 11/25/27 | 6,700 | 6,287 | |
3,4 | Freddie Mac Multifamily Structured Pass-Through Certificates Class A2 Series K072 | 3.444% | 12/25/27 | 11,900 | 11,218 | |
3,4,6 | Freddie Mac Multifamily Structured Pass-Through Certificates Class A2 Series K-077 | 3.850% | 5/25/28 | 1,800 | 1,718 | |
3,4,6 | Freddie Mac Multifamily Structured Pass-Through Certificates Class A2 Series K086 | 3.859% | 11/25/28 | 4,400 | 4,166 | |
3,4 | Freddie Mac Multifamily Structured Pass-Through Certificates Class A2 Series K087 | 3.771% | 12/25/28 | 3,400 | 3,214 | |
3,4 | Freddie Mac Multifamily Structured Pass-Through Certificates Class A2 Series K088 | 3.690% | 1/25/29 | 5,400 | 5,084 | |
3,4 | Freddie Mac Multifamily Structured Pass-Through Certificates Class A2 Series K090 | 3.422% | 2/25/29 | 2,500 | 2,324 |
Coupon | Maturity Date | Face Amount ($000) | Market Value ($000) | |||
3,4,6 | Freddie Mac Multifamily Structured Pass-Through Certificates Class A2 Series K506 | 4.650% | 8/25/28 | 6,500 | 6,369 | |
3,4,6 | Freddie Mac Multifamily Structured Pass-Through Certificates Class A2 Series K507 | 4.800% | 9/25/28 | 30,550 | 30,038 | |
3,4,6 | Freddie Mac Multifamily Structured Pass-Through Certificates Class A2 Series K508 | 4.740% | 8/25/28 | 33,000 | 32,446 | |
3,4 | Freddie Mac Multifamily Structured Pass-Through Certificates Class A2 Series K509 | 4.850% | 9/25/28 | 23,000 | 22,710 | |
3,4,6 | Freddie Mac Multifamily Structured Pass-Through Certificates Class A2 Series K510 | 5.069% | 10/25/28 | 6,000 | 5,964 | |
3,4 | Freddie Mac Multifamily Structured Pass-Through Certificates Class A2 Series K511 | 4.860% | 10/25/28 | 31,725 | 31,292 | |
3,4 | Freddie Mac Multifamily Structured Pass-Through Certificates Class A2 Series K512 | 5.000% | 11/25/28 | 60,500 | 59,982 | |
3,4,6 | Freddie Mac Multifamily Structured Pass-Through Certificates Class A2 Series K513 | 4.724% | 12/25/28 | 60,700 | 59,528 | |
3,4 | Freddie Mac Multifamily Structured Pass-Through Certificates Class A2 Series K514 | 4.572% | 12/25/28 | 47,925 | 46,768 | |
3,4,6 | Freddie Mac Multifamily Structured Pass-Through Certificates Class A2 Series K520 | 5.180% | 3/25/29 | 49,800 | 49,796 | |
Total Asset-Backed/Commercial Mortgage-Backed Securities (Cost $550,169) | 543,931 | |||||
Shares | ||||||
Temporary Cash Investments (3.7%) | ||||||
Money Market Fund (3.7%) | ||||||
7 | Vanguard Market Liquidity Fund (Cost $168,665) | 5.394% | 1,686,968 | 168,680 | ||
Total Investments (107.6%) (Cost $5,193,584) | 4,968,295 | |||||
Maturity Date | Face Amount ($000) | |||||
Conventional Mortgage-Backed Securities—Liability for Sale Commitments (-1.2%) | ||||||
3,4 | UMBS Pool | 3.500% | 3/25/52 | (7,070) | (2,793) |
Coupon | Maturity Date | Face Amount ($000) | Market Value ($000) | |||
3,4 | UMBS Pool | 6.000% | 5/15/54 | (51,100) | (50,613) | |
Total Conventional Mortgage-Backed Securities—Liability for Sale Commitments (Proceeds $50,489) | (53,406) | |||||
Other Assets and Liabilities—Net (-6.4%) | (296,622) | |||||
Net Assets (100%) | 4,618,267 | |||||
Cost is in $000. |
1 | Securities with a value of $4,008,000 have been segregated as collateral for certain open To Be Announced (TBA) transactions. |
2 | Securities with a value of $15,780,000 have been segregated as initial margin for open futures contracts. |
3 | The issuer was placed under federal conservatorship in September 2008; since that time, its daily operations have been managed by the Federal Housing Finance Agency and it receives capital from the U.S. Treasury, as needed to maintain a positive net worth, in exchange for senior preferred stock. |
4 | The average or expected maturity is shorter than the final maturity shown because of the possibility of interim principal payments and prepayments or the possibility of the issue being called. |
5 | Includes securities purchased on a when-issued or delayed-delivery basis for which the fund has not taken delivery as of April 30, 2024. |
6 | Variable-rate security; rate shown is effective rate at period end. Certain variable-rate securities are not based on a published reference rate and spread but are determined by the issuer or agent based on current market conditions. |
7 | Affiliated money market fund available only to Vanguard funds and certain trusts and accounts managed by Vanguard. Rate shown is the 7-day yield. |
REMICS—Real Estate Mortgage Investment Conduits. | |
UMBS—Uniform Mortgage-Backed Securities. |
Futures Contracts | ||||
($000) | ||||
Expiration | Number of Long (Short) Contracts | Notional Amount | Value and Unrealized Appreciation (Depreciation) | |
Long Futures Contracts | ||||
2-Year U.S. Treasury Note | June 2024 | 3,694 | 748,612 | (6,260) |
Short Futures Contracts | ||||
5-Year U.S. Treasury Note | June 2024 | (3,799) | (397,916) | 5,199 |
10-Year U.S. Treasury Note | June 2024 | (3,251) | (349,279) | 8,960 |
Long U.S. Treasury Bond | June 2024 | (111) | (12,633) | 326 |
Ultra 10-Year U.S. Treasury Note | June 2024 | (298) | (32,845) | 133 |
Ultra Long U.S. Treasury Bond | June 2024 | (221) | (26,423) | (17) |
14,601 | ||||
8,341 |
Level 1 ($000) | Level 2 ($000) | Level 3 ($000) | Total ($000) | |
Investments | ||||
Assets | ||||
U.S. Government and Agency Obligations | — | 4,255,684 | — | 4,255,684 |
Asset-Backed/Commercial Mortgage-Backed Securities | — | 543,931 | — | 543,931 |
Temporary Cash Investments | 168,680 | — | — | 168,680 |
Total | 168,680 | 4,799,615 | — | 4,968,295 |
Liabilities | ||||
Conventional Mortgage-Backed Securities—Liability for Sale Commitments | — | 53,406 | — | 53,406 |
Derivative Financial Instruments | ||||
Assets | ||||
Futures Contracts1 | 14,618 | — | — | 14,618 |
Liabilities | ||||
Futures Contracts1 | 6,277 | — | — | 6,277 |
1 | Includes cumulative appreciation (depreciation) on futures contracts and centrally cleared swaps, if any, as reported in the Schedule of Investments. |