(American Beacon Flexible Bond Fund℠)

Investment Objective

The Fund seeks to provide a positive total return regardless of market conditions.

Fees and Expenses of the Fund

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for sales discounts if you and your eligible family members invest, or agree to invest in the future, at least $50,000 in all classes of the American Beacon Funds on an aggregated basis. More information about these and other discounts is available from your financial professional and in "Choosing Your Share Class" on page 22 of the Prospectus and "Additional Purchase and Sale Information for A Class Shares" on page 43 of the statement of additional information ("SAI").

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees - (American Beacon Flexible Bond Fund℠)	Class A		Class C	Class Y	Institutional Class	Investor Class
Maximum sales charge imposed on purchases (as a percentage of offering price)	4.75%		none	none	none	none
Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds)	0.50%	[1]	1.00%	none	none	none

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

^[1]

Annual Fund Operating Expenses - (American Beacon Flexible Bond Fund℠)		Class A	Class C	Class Y	Institutional Class	Investor Class
Management Fees		0.60%	0.60%	0.60%	0.60%	0.60%
Distribution (12b-1) Fees		0.25%	1.00%	none	none	none
Other Expenses		0.81%	0.80%	0.74%	0.67%	0.91%
Acquired Fund Fees and Expenses		0.01%	0.01%	0.01%	0.01%	0.01%
Total Annual Fund Operating Expenses	[1]	1.67%	2.41%	1.35%	1.28%	1.52%
Fee Waiver and/or expense reimbursement	[2]	(0.37%)	(0.36%)	(0.35%)	(0.37%)	(0.24%)
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement		1.30%	2.05%	1.00%	0.91%	1.28%

Example

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same, except that the example reflects the fee waiver/expense reimbursement arrangement for each share class through December 31, 2016. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

Expense Example - (American Beacon Flexible Bond Fund℠) - USD ($)	1 Year	3 Years	5 Years	10 Years
Class A	601	942	1,306	2,328
Class C	308	717	1,253	2,719
Class Y	102	393	706	1,593
Institutional Class	93	369	667	1,513
Investor Class	130	457	806	1,792

Assuming no redemption of shares:

Expense Example, No Redemption - (American Beacon Flexible Bond Fund℠)	1 Year	3 Years	5 Years	10 Years
Class C | USD ($)	208	717	1,253	2,719

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual Fund operating expenses or in the Example, affect the Fund's performance. The Fund's portfolio turnover rate for the Fund's last fiscal year was 492% of the average value of the portfolio.

Principal Investment Strategies

The Fund's investment approach is flexible, allocating investments across a wide range of investment opportunities globally to attempt to achieve positive total return regardless of market conditions over a full market cycle. The Fund seeks to achieve its investment objective by investing under normal market conditions at least 80% of its net assets, plus borrowings for investment purposes, in fixed-income instruments of varying maturities and derivative instruments that provide exposure to fixed income instruments. Fixed-income instruments include obligations issued or guaranteed by the U.S. and non-U.S. governments, their agencies or instrumentalities and political subdivisions, inflation index linked securities, debt securities of supranational organizations, quasi-sovereign debt, emerging markets debt, corporate bonds, convertible and non-convertible debt, municipal securities, Rule 144A securities, variable and floating rate securities, commercial paper, mortgage-backed securities (commercial and residential), repurchase agreements and reverse repurchase agreements, bank certificates of deposit, fixed time deposits and bankers' acceptances, collateralized mortgage obligations and other mortgage-related products, asset-backed securities, money market funds and bank loans and loan participation interests. The Fund invests in fixed income instruments without restrictions on their credit quality, although under normal market conditions, the Fund's investments in non-investment grade securities, known also as high yield or "junk" bonds, is limited to 40% of the Fund's total assets. The bond portfolio will maintain an average credit quality of investment grade under normal market conditions. The Fund may invest a significant portion of its assets in a particular geographic region or country, including emerging markets.

The Fund's investments in derivatives may include options, futures contracts, forward contracts, warrants, swaps, structured notes, and similar instruments. The Fund uses derivative instruments to enhance total return, to hedge against fluctuations in securities prices, interest rates or currency exchange rates, to change the effective duration of its portfolio, to manage certain investment risks or as a substitute for the purchase or sale of the underlying currencies or securities. The Fund's use of derivatives may be extensive.

The Fund also may have significant exposure to foreign currencies for investment or hedging purposes by purchasing or selling forward currency exchange contracts in non-U.S. or emerging market currencies, non-U.S. currency futures contracts, options on non-U.S. currencies and non-U.S. currency futures and swaps for cross-currency investments. The Fund may also make direct investments in non-U.S. currencies and in securities denominated in non-U.S. currencies. Investments in currencies and currency hedging are established to extract value or reduce risk. The Fund's investments may expose the Fund to U.S. and foreign interest rates. The Fund may also make equity investments, including preferred stocks, common stocks and real estate investment trusts ("REITs"). The Fund may invest in companies of all market capitalizations, including small-and mid-capitalization companies.

In selecting investments for the Fund, the Fund's sub-advisors develop long- and short-term views of global economic themes suggested by macro-economic factors, interest rates, market cycles, credit cycles and other relevant factors. The sub-advisors seek to capitalize on these themes by investing where opportunities exist by either making long investments where they believe favorable return conditions exist, or by establishing short positions where the lack of absolute return opportunities could result in favorable returns for a short position. The sub-advisors examine the relative risk and return characteristics of each investment to determine the ultimate positioning of their individual portfolios. The Fund's sub-advisors sell securities when their economic views change and an investment idea, based on its return potential or level of risk no longer fits within their overall macro strategy or when better ideas are uncovered to improve the Fund's portfolio.

The Fund's weighted average portfolio duration may range from -5 to +8 years, as calculated by the sub-advisor, depending upon the sub-advisors' forecast of interest rates and assessment of market risk generally. Duration is a measure of the life expectancy of a fixed income security that is used to determine the sensitivity of a security's price to changes in interest rates. Generally, the price of a security with a positive duration will fall when interest rates rise, and vice versa. Moreover, larger absolute values of duration correspond to larger price changes. A duration of "one year" means that a security's price would be expected to decrease by approximately 1% with a 1% increase in interest rates and, conversely, a negative duration of one year generally will increase the price of the security by 1%. The Fund may have a negative weighted average duration through the use of short futures, put option positions and total return swaps. Such instruments have durations roughly equal to the negative duration of the securities that underlie those positions and have the effect of reducing portfolio duration by approximately the same amount that selling an equivalent amount of the underlying securities would. The Fund is non-diversified, which means that it is not limited to a percentage of assets that it may invest in any one issuer.

Principal Risks

There is no assurance that the Fund will achieve its investment objective and you could lose part or all of your investment in the Fund. The Fund is not designed for investors who need an assured level of income and is intended to be a long-term investment. The Fund is not a complete investment program and may not be appropriate for all investors. Investors should carefully consider their own investment goals and risk tolerance before investing in the Fund. The principal risks of investing in the Fund are:

Allocation Risk
The sub-advisor's judgments about, and allocations between, asset classes and market exposures may adversely affect the Fund's performance. This risk may be increased by the use of derivatives to increase allocations to various market exposures.

Asset-Backed and Mortgage Related Securities Risk
Investments in asset-backed and mortgage related securities are subject to market risks for fixed-income securities which include, but are not limited to, interest rate risk, prepayment risk and extension risk.

Convertible Securities Risk
The value of a convertible security typically increases or decreases with the price of the underlying common stock. In general, a convertible security is subject to the risks of stocks when the underlying stock's price is high relative to the conversion price and is subject to the risks of debt securities when the underlying stock's price is low relative to the conversion price. Many convertible securities have credit ratings that are below investment grade and are subject to the same risks as an investment in lower-rated debt securities (commonly known as "junk bonds"). In addition, because companies that issue convertible securities may be small- or mid-cap companies, to the extent the Fund invests in convertible securities issued by small- or mid-cap companies, it will be subject to the risks of investing in such companies. The stocks of small- and mid-cap companies may fluctuate more widely in price than the market as a whole and there may also be less trading in small- or mid-cap stocks.

Counterparty Risk
The Fund is subject to the risk that a party or participant to a transaction, such as a broker or derivative counterparty, will be unwilling or unable to satisfy its obligation to make timely principal, interest or settlement payments or to otherwise honor its obligations to the Fund.

Credit Risk
The Fund is subject to the risk that the issuer or guarantor of a debt security, or the counterparty to a derivatives contract or a loan will fail to make timely payment of interest or principal or otherwise honor its obligations or default completely. Credit risk is typically greater for securities with ratings that are below investment grade (commonly referred to as "junk bonds"). Since the Fund can invest significantly in lower-quality debt securities considered speculative in nature, this risk will be substantial.

Currency Risk
The Fund may have exposure to foreign currencies by making direct investments in non-U.S. currencies or in securities denominated in non-U.S. currencies, purchasing or selling forward currency exchange contracts in non-U.S. currencies, non-U.S. currency futures contracts, options on non-U.S. currencies and non-U.S. currency futures, and swaps for cross-currency investments. Foreign currencies may decline in value relative to the U.S. dollar and other currencies and thereby affect the Fund's investments in foreign (non-U.S.) currencies or in securities that trade in, and receive revenues in, or in derivatives that provide exposure to, foreign (non-U.S.) currencies.

Derivatives Risk
Derivatives may involve significant risk. The use of derivative instruments may expose the Fund to additional risks that it would not be subject to if it invested directly in the securities underlying those derivatives including the high degree of leverage often embedded in such instruments, and potential material and prolonged deviations between the theoretical value and realizable value of a derivative. Some derivatives have the potential for unlimited loss, regardless of the size of the Fund's initial investment. Derivatives may be illiquid and may be more volatile than other types of investments. The Fund may buy or sell derivatives not traded on an exchange and which may be subject to heightened liquidity and valuation risk. Derivative investments can increase portfolio turnover and transaction costs. Derivatives also are subject to counterparty risk. As a result, the Fund may obtain no recovery of its investment or may only obtain a limited recovery, and any recovery may be delayed. Not all derivative transactions require a counterparty to post collateral, which may expose the Fund to greater losses in the event of a default by a counterparty. In addition, the Fund's investments in derivatives are subject to the following risks:

• Futures and Forward Contracts. Futures and forward contracts, including non-deliverable forwards ("NDFs"), are derivative instruments pursuant to a contract where one party pays a fixed price for an agreed amount of securities or other underlying assets at an agreed date or to buy or sell a specific currency at a future date at a price set at the time of the contract. There may be an imperfect correlation between the movement in the prices of futures contracts and the value of their underlying instruments or indexes. There can be no assurance that any strategy used will succeed. Not all forward contracts, including NDFs, require a counterparty to post collateral, which may expose the Fund to greater losses in the event of a default by a counterparty. There may not be a liquid secondary market for the futures contracts. Forward currency transactions, including NDFs, include the risks associated with fluctuations in currency. Interest rate and Treasury futures contracts expose the Fund to price fluctuations resulting from changes in interest rates. The Fund could suffer a loss if interest rates rise after the Fund has purchased an interest rate futures contract or fall after the Fund has sold an interest rate futures contract. Similarly, Treasury futures contracts expose the Fund to potential losses if interest rates do not move as expected.

• Options. In order for a call option to be profitable, the market price of the underlying security or index must rise sufficiently above the call option exercise price to cover the premium and transaction costs. These costs will reduce any profit that might otherwise have been realized had the Fund bought the underlying security instead of the call option. For a put option to be profitable, the market price of the underlying security or index must decline sufficiently below the put option's exercise price to cover the premium and transaction costs. By using put options in this manner, the Fund will reduce any profit it might otherwise have realized from having shorted the declining underlying security by the premium paid for the put option and by transaction costs. If the Fund sells a put option, there is a risk that the Fund may be required to buy the underlying asset at a disadvantageous price. If the Fund sells a call option on an underlying asset that the Fund owns and the underlying asset has increased in value when the call option is exercised, the Fund will be required to sell the underlying asset at the call price and will not be able to realize any of the underlying asset's value above the call price.

• Structured Notes. Structured notes are derivative debt instruments with principal and/or interest payments linked to the value of a commodity, a foreign currency, an index of securities, an interest rate or other financial indicators ("reference instruments"). The payments on a structured note may vary based on changes in one or more specified reference instruments, such as a floating interest rate compared to a fixed interest rate, the exchange rates between two currencies, one or more securities or a securities or commodities index. A structured note may be positively or negatively indexed. Structured notes are subject to interest rate risk. They are also subject to credit risk with respect both to the issuer and, if applicable, to the underlying security or borrower. If the underlying investment or index does not perform as anticipated, the structured note might pay less interest than the stated coupon payment or repay less principal upon maturity.

• Swap Agreements. Swaps can involve greater risks than a direct investment in an underlying asset, because swaps typically include a certain amount of embedded leverage. If swaps are used as a hedging strategy, the Fund is subject to the risk that the hedging strategy may not eliminate the risk that it is intended to offset, due to, among other reasons, the occurrence of unexpected price movements or the non-occurrence of expected price movements. Swaps also may be difficult to value. Equity swaps are subject to liquidity risk and counterparty risk. Total return swaps and currency swaps are subject to counterparty risk, credit risk and liquidity risk. In addition to these risks, total return swaps are subject to market risk and interest rate risk, if the underlying securities are bonds or other debt obligations. In addition, currency swaps are subject to currency risk.

• Warrants. Warrants may be more speculative than certain other types of investments because warrants do not carry with them dividend or voting rights with respect to the underlying securities, or any rights in the assets of the issuer. In addition, the value of a warrant does not necessarily change with the value of the underlying securities and a warrant ceases to have value if it is not exercised prior to its expiration date.

Emerging Markets Risk
When investing in emerging markets, the risks of investing in foreign securities discussed below are heightened. Emerging markets are generally smaller, less developed, less liquid and more volatile than the securities markets of the U.S. and other developed markets. There are also risks of: greater political uncertainties; an economy's dependence on revenues from particular commodities or on international aid or development assistance; currency transfer restrictions; a limited number of potential buyers for such securities; and delays and disruptions in securities settlement procedures.

Equity Investments Risk
Equity securities are subject to market risk. The Fund's investments in equity securities may expose the Fund to additional risks. The value of a company's common stock may fall as a result of factors affecting the company, companies in the same industry or sector, or the financial markets overall. Common stock generally is subordinate to preferred stock upon the liquidation or bankruptcy of the issuing company. Preferred stocks are sensitive to movements in interest rates. Preferred stocks may be less liquid than common stocks and, unlike common stocks, participation in the growth of an issuer may be limited. Distributions on preferred stocks generally are payable at the discretion of an issuer and after required payments to bond holders. Investments in REITs are subject to the risks associated with investing in the real estate industry such as adverse developments affecting the real estate industry and real property values.

Flexible Strategy Risk
The Fund uses a variety of investment strategies seeking to provide a positive total return regardless of market conditions. The sub-advisors do not attempt to keep the portfolio structure or the Fund's performance consistent with any designated stock, bond or market index, and during times of market rallies, the Fund may not perform as well as other funds that seek to outperform an index. Over time, the investment performance of flexible strategies is typically substantially independent of longer term movements in the stock and bond market. Interest rate levels and currency valuations will not always respond as the sub-advisors expect and portfolio securities may remain over- or under-valued.

Foreign Investing Risk
Non U.S. investments carry potential risks not associated with U.S. investments. Such risks include, but are not limited to: (1) currency exchange rate fluctuations, (2) political and financial instability, (3) less liquidity and greater volatility, (4) lack of uniform accounting, auditing and financial reporting standards; (5) increased price volatility; (6) less government regulation and supervision of foreign stock exchanges, brokers and listed companies; and (7) delays in transaction settlement in some foreign markets.

Hedging Risk
If the Fund uses a hedging instrument at the wrong time or judges the market conditions incorrectly, or the hedged instrument does not correlate to the risk sought to be hedged, the hedge might be unsuccessful, reduce the Fund's return, or create a loss.

High Portfolio Turnover Risk
Portfolio turnover is a measure of the Fund's trading activity over a one-year period. A portfolio turnover rate of 100% would indicate that the Fund sold and replaced the entire value of its securities holdings during the period. High portfolio turnover could increase the Fund's transaction costs, have a negative impact on performance, and generate higher capital gain distributions to shareholders than if the Fund had a low portfolio turnover rate.

High Yield Securities Risk
Investing in high yield, below investment-grade securities (commonly referred to as "junk bonds") generally involves significantly greater risks of loss of your money than an investment in investment grade securities. High yield debt securities may fluctuate more widely in price and yield and may fall in price when the economy is weak or expected to become weak. High yield securities are considered to be speculative with respect to an issuer's ability to pay interest and principal and carry a greater risk that the issuers of lower-rated securities will default on the timely payment of principal and interest. Below investment grade securities may experience greater price volatility and less liquidity than investment grade securities.

Illiquid and Restricted Securities Risk
Securities not registered in the U.S. under the Securities Act of 1933, as amended (the "Securities Act"), including Rule 144A securities, may not be listed on an exchange and may have no active trading market. They may be more difficult to purchase or sell at an advantageous time or price because such securities may not be readily marketable in broad public markets. The Fund may not be able to sell a restricted security when the sub-advisor considers it desirable to do so and/or may have to sell the security at a lower price than the Fund believes is its fair market value. In addition, transaction costs may be higher for restricted securities and the Fund may receive only limited information regarding the issuer of a restricted security. The Fund may have to bear the expense of registering restricted securities for resale and the risk of substantial delays in effecting the registration.

Inflation Index Linked Securities Risk
Unlike a conventional bond, whose issuer makes regular fixed interest payments and repays the face value of the bond at maturity, an inflation index linked security provides principal payments and interest payments, which are adjusted over time to reflect a rise (inflation) or a drop (deflation) in the reference index. The value of inflation-linked securities is expected to change in response to real interest rates. The price of an inflation-linked security generally falls when real interest rates rise and rises when real interest rates fall.

Interest Rate Risk
The Fund is subject to the risk that the market value of fixed income securities or derivatives it holds, particularly mortgage backed and other asset backed securities, will decline due to rising interest rates. As of the date of this Prospectus, interest rates are near historic lows, but may rise substantially and/or rapidly, potentially resulting in substantial losses to the Fund. Generally, the value of investments with interest rate risk, such as fixed income securities, will move in the opposite direction to movements in interest rates. The prices of fixed income securities or derivatives are also affected by their duration. Fixed income securities or derivatives with longer duration generally have greater sensitivity to changes in interest rates. For example, if a bond has a duration of eight years, a 1% increase in interest rates could be expected to result in a 8% decrease in the value of the bond. An increase in interest rates can impact markets broadly as well. For example, some investors buy securities and derivatives with borrowed money; an increase in interest rates can cause a decline in those markets.

Investment Risk
An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. When you sell your shares of the Fund, they could be worth less than what you paid for them. Therefore, you may lose money by investing in the Fund.

Issuer Risk
The value of, and/or the return generated by, a security may decline for a number of reasons which directly relate to the issuer, such as management performance, financial leverage and reduced demand for the issuer's goods or services, as well as the historical and prospective earnings of the issuer and the value of its assets.

Leverage Risk
The Fund's use of futures, forward contracts, swaps, reverse repurchase agreements, other derivative instruments and selling securities short will have the economic effect of financial leverage. Financial leverage magnifies the exposure to the swings in prices of an asset or class of assets underlying a derivative instrument and results in increased volatility, which means that the Fund will have the potential for greater losses than if the Fund does not use the derivative instruments that have a leveraging effect. Leverage may result in losses that exceed the amount originally invested and may accelerate the rate of losses. Leverage tends to magnify, sometimes significantly, the effect of any increase or decrease in the Fund's exposure to an asset or class of assets and may cause the Fund's net asset value ("NAV") to be volatile.

Liquidity Risk
The Fund is susceptible to the risk that certain investments held by the Fund may have limited marketability or be subject to restrictions on sale, and may be difficult to sell at favorable times or prices. The Fund could lose money if it is unable to dispose of an investment at a time that is most beneficial to the Fund.

Loan Interests Risk
Unlike publicly traded common stocks which trade on national exchanges, there is no central place or exchange for loans to trade. Loans trade in an over-the-counter market, and confirmation and settlement, which are effected through standardized procedures and documentation, may take significantly longer than seven days to complete. Extended trade settlement periods may, in unusual market conditions with a high volume of shareholder redemptions, present a risk to shareholders regarding the Fund's ability to pay redemption proceeds within the allowable time periods stated in its prospectus. The secondary market for floating rate loans also may be subject to irregular trading activity and wide bid/ask spreads. The lack of an active trading market for certain loans may impair the ability of the Fund to sell its loan interests at a time when it may otherwise be desirable to do so or may require the Fund to sell them at prices that are less than what the Fund regards as their fair market value and may make it difficult to value such loans. Interests in loans made to finance highly leveraged companies or transactions, such as corporate acquisitions, may be especially vulnerable to adverse changes in economic or market conditions. When the Fund's loan interest is a participation, the Fund is subject to the risk that the party selling the participation interest will not remit the Fund's pro rata share of loan payments to the Fund and the Fund may have less control over the exercise of remedies than the party selling the participation interest

Market Risk
Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the market, can affect the value of the Fund's shares. The Fund's fixed-income investments are subject to the risk that the lack of liquidity or other adverse credit market conditions may hamper the Fund's ability to purchase and sell the debt securities. The Fund's equity investments are subject to stock market risk, which involves the possibility that the value of the Fund's investments in stocks will decline due to volatility or drops in any of the many individual country or global financial markets. Such events may cause the value of securities owned by the Fund to go up or down, sometimes rapidly or unpredictably, and may lead to increased redemptions, which could cause the Fund to experience a loss when selling securities to meet redemption requests by shareholders.Turbulence in financial markets and reduced liquidity in credit, fixed-income, or equity markets may negatively affect many issuers worldwide which could adversely affect the Fund.

Market Timing Risk
Frequent trading by Fund shareholders poses risks to other shareholders in that Fund, including (i) the dilution of the Fund's NAV, (ii) an increase in the Fund's expenses, and (iii) interference with the portfolio manager's ability to execute efficient investment strategies. Because of specific securities in which the Fund may invest, it could be subject to the risk of market timing activities by shareholders.

Municipal Securities Risk
Municipal securities could be adversely affected by adverse political and legislative changes. Changes in the financial condition of a municipality may affect the ability of a municipal issuer to make interest and principal payments on a security as they become due. Changes in interest rates and market conditions may directly impact the liquidity and valuation of municipal securities, which may affect the yield and value of the Fund's municipal securities investments. A downgrade in the issuer's or security's credit rating can reduce the market value of the security.

Non-Diversification Risk
The Fund is non-diversified, which means the Fund may focus its investments in the securities of a comparatively small number of issuers. Investment in securities of a limited number of issuers exposes the Fund to greater market risk and potential losses than if assets were diversified among the securities of a greater number of investments.

Other Investment Companies Risk The Fund may invest in shares of other registered investment companies, including money market funds. To the extent that the Fund invests in shares of other registered investment companies, the Fund will indirectly bear the fees and expenses charged by the underlying funds in addition to the Fund's direct fees and expenses and will be subject to the risks associated with investments in those funds. For example, money market funds are subject to interest rate risk, credit risk, and market risk.

Prepayment and Extension Risk
Prepayment risk is the risk that the principal amount of the underlying collateral may be repaid prior to the bond's maturity date. Due to a decline in interest rates or excess cash flow, a debt security may be called or otherwise prepaid before maturity. If this occurs, no additional interest will be paid on the investment and the Fund may have to invest at a lower rate, may not benefit from an increase in value that may result from declining interest rates, and may lose any premium it paid to acquire the security. Variable and floating rate securities may be less sensitive to prepayment risk. Extension risk is the risk that a decrease in prepayments may, as a result of higher interest rates or other factors, result in the extension of a security's effective maturity, heighten interest rate risk and increase the potential for a decline in price.

Repurchase Agreement and Reverse Repurchase Agreement Risk
The use of repurchase agreements, involves counterparty risk and credit risk. There is also the risk that the seller of the agreement may become insolvent and subject to liquidation. Using reverse repurchase agreements to earn additional income involves the risk that the interest earned on the invested proceeds is less than the expense of the reverse repurchase agreement transaction. This technique may also have a leveraging effect on the Fund's portfolio, although the Fund's intent to cover these positions minimizes this effect.

Securities Selection Risk
Securities selected by the sub-advisors or the Manager for the Fund may not perform to expectations. This could result in the Fund's underperformance compared to other funds with similar investment objectives.

Segregated Assets Risk In connection with certain transactions that may give rise to future payment obligations, including short sales and investments in derivatives, the Fund may be required to maintain a segregated amount of, or otherwise earmark, cash or liquid securities to cover the position or transaction, which cannot be sold while the position they are covering is outstanding, unless they are replaced with other assets of equal value.

Short Position Risk
The Fund's losses are potentially unlimited in a short position transaction because there is potentially no limit on the amount that the security that the Fund is required to purchase may have appreciated. Because the Fund may invest the proceeds of a short sale, another effect of short selling on the Fund is similar to the effect of leverage, in that it amplifies changes in the Fund's net asset value since it increases the exposure of the Fund to the market.

Small and Mid-Capitalization Companies Risk
Investing in the securities of small and mid-capitalization companies involves greater risk and the possibility of greater price volatility than investing in larger capitalization and more established companies. Since small and mid-capitalization companies may have limited operating history, product lines, and financial resources, the securities of these companies may lack sufficient market liquidity, and they can be particularly sensitive to expected changes in interest rates, borrowing costs and earnings.

Sovereign and Quasi Sovereign Debt Risk
The Fund normally will have significant investments in sovereign and quasi-sovereign debt securities. These investments are subject to risk of payment delays or defaults due to (1) country cash flow problems, (2) insufficient foreign currency reserves, (3) political considerations, (4) large debt positions relative to the country's economy, (5) policies toward foreign lenders or investors, (6) the failure to implement economic reforms required by the International Monetary Fund or other multilateral agencies, or (7) an inability or unwillingness to repay debts. It may be particularly difficult to enforce the rights of debt holders in frontier and emerging markets. A governmental entity that defaults on an obligation may request additional time in which to pay or further loans or may seek to restructure its obligations to reduce interest rates or outstanding principal. There is no legal process for collecting sovereign and quasi-sovereign debt that a government does not pay nor are there bankruptcy proceedings through which all or part of the sovereign debt that a governmental entity has not repaid may be collected. Sovereign and quasi-sovereign debt risk is increased for emerging and frontier markets issuers, which are among the largest debtors to commercial banks and foreign governments. At times, certain emerging market countries have declared moratoria on the payment of principal and interest on external debt. Certain emerging market countries have experienced difficulty in servicing their sovereign debt on a timely basis, which has led to defaults and the restructuring of certain indebtedness.

Supranational Risk
Obligations of supranational entities are subject to the risk that the governments on whose support the entity depends for its financial backing or repayment may be unable or unwilling to provide that support. Obligations of a supranational entity that are denominated in foreign currencies will also be subject to the risks associated with investments in foreign currencies.

Unrated Securities Risk
Investing in unrated securities involves the risk that the sub-advisor may not accurately evaluate the security's comparative credit rating. To the extent that the Fund invests in unrated securities, the Fund's success in achieving its investment objective may depend more heavily on the sub-advisors' credit analysis than if the Fund invested exclusively in rated securities.

U.S. Government Securities Risk and Government Sponsored Enterprises Risk
A security backed by the U.S. Treasury or the full faith and credit of the United States is guaranteed by the applicable entity only as to the timely payment of interest and principal when held to maturity. The market prices for such securities are not guaranteed and will fluctuate. Securities held by the Fund that are issued by government-sponsored enterprises, such as the Federal National Mortgage Association ("Fannie Mae"), the Federal Home Loan Mortgage Corporation ("Freddie Mac"), Federal Home Loan Banks, Federal Farm Credit Banks, and the Tennessee Valley Authority are not guaranteed by the U.S. Treasury and are not backed by the full faith and credit of the U.S. Government. U.S. Government securities and securities of government sponsored entities are also subject to credit risk, interest rate risk and market risk.

Valuation Risk
The Fund may value certain assets at a price different from the price at which they can be sold. This risk may be especially pronounced for investments, such as certain derivatives, which may be illiquid or which may become illiquid.

Variable and Floating Rate Securities Risk
The interest rates payable on variable and floating rate securities are not fixed and may fluctuate based upon changes in market rates. The interest rate on a floating rate security is a variable rate which is tied to another interest rate, such as a money-market index or Treasury bill rate. Variable and floating rate securities are subject to interest rate risk and credit risk.

As short-term interest rates decline, interest payable on floating rate securities typically should decrease. Alternatively, during periods of increasing interest rates, changes in the interest rates of floating rate securities may lag behind changes in market rates or may have limits on the maximum increases in interest rates. The value of floating rate securities may decline if their interest rates do not rise as much, or as quickly, as interest rates in general. Conversely, floating rate securities will not generally increase in value if interest rates decline.

Fund Performance

The bar chart and table below provide an indication of risk by showing how the Fund's performance has varied from year to year. The table shows how the Fund's performance compares to the BofA Merrill Lynch 3-Month LIBOR Index, which is the Fund's benchmark index, and the Barclays Capital U.S. Aggregate Index, an additional broad-based securities market index with characteristics that are similar to those of the Fund.

The chart and the table below show the performance of the Fund's Investor Class shares for all periods. The Fund began offering all shares classes on July 5, 2011. You may obtain updated performance information on the Fund's website at www.americanbeaconfunds.com. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.

Calendar year total returns for Investor Class Shares. Year Ended 12/31

Highest Quarterly Return:
2.89% 1st Quarter 2012
1/1/2012 through 12/31/2014

Lowest Quarterly Return:
-1.93% 2nd Quarter 2013
1/1/2012 through 12/31/2014

The calendar year-to-date total return as of September 30, 2015 was -3.06%.

Average annual total returns for periods ended December 31, 2014

Average Annual Total Returns - (American Beacon Flexible Bond Fund℠)	1 Year	Since Inception	Inception Date of Class
Investor Class	0.96%	2.56%	Jul. 05, 2011
Investor Class | Returns After Taxes on Distributions	(0.11%)	1.59%	Jul. 05, 2011
Investor Class | Returns After Taxes on Distributions and Sales of Fund Shares	0.54%	1.59%	Jul. 05, 2011
Class A	0.87%	2.38%	Jul. 05, 2011
Class C	0.04%	1.80%	Jul. 05, 2011
Class Y	1.18%	2.74%	Jul. 05, 2011
Institutional Class	1.29%	2.83%	Jul. 05, 2011
BofA Merril Lynch 3 Month Libor Index (Reflects no deduction for fees, expenses or taxes)	0.23%	0.33%
Barclays Capital U.S. Aggregate Index (Reflects no deduction for fees, expenses or taxes)	5.97%	3.66%

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local income taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown. The return after taxes on distributions and sale of Fund shares may exceed the return before taxes due to an assumed tax benefit from any losses on a sale of Fund shares at the end of the measurement period. If you hold your Fund shares through a tax-deferred arrangement, such as an individual retirement account or a 401(k) plan, the after-tax returns do not apply to your situation. After-tax returns are shown only for Investor Class shares; after-tax returns for other share classes will vary.

[1] A contingent deferred sales charge ("CDSC") of 0.50% will be charged on certain purchases of $250,000 or more that are redeemed in whole or part within 18 months of purchase.

[1] The Total Annual Fund Operating Expenses do not correlate to the ratio of expenses to average net assets provided in the Fund's Financial Highlights table, which reflects the operating expenses of the Fund and does not include Acquired Fund Fees and Expenses.

[2] The Manager has contractually agreed to waive fees and/or reimburse expenses of the Fund's A Class, C Class, Y Class, Institutional Class and Investor Class shares, as applicable, through December 31, 2016 to the extent that Total Annual Fund Operating Expenses exceed 1.29% for the A Class, 2.04% for the C Class, 0.99% for the Y Class, 0.90% for the Institutional Class and 1.27% for the Investor Class (excluding taxes, interest, brokerage commissions, acquired fund fees and expenses, securities lending fees, expenses associated with securities sold short, litigation, and other extraordinary expenses). The contractual expense reimbursement can be changed only with the approval of a majority of the Fund's Board of Trustees. The Manager can be reimbursed by the Fund for any contractual fee waivers or expense reimbursements if reimbursement to the Manager (a) occurs within three years after the Manager's own waiver or reimbursement and (b) does not cause the Total Annual Fund Operating Expenses of a class to exceed the contractual percentage limit in effect at the time of the waiver/reimbursement.

[1] The fee table has been restated to reflect the management fee rate currently being paid by the Fund.