Mutual Funds

American Beacon Small Cap Index Fund

Portfolio information as of March 31, 2013

Summary
Performance
Overview

Investment Objective

A Fund seeking to match the performance of the Russell 2000® Index (the "Russell 2000") as closely as possible before the deduction of Fund expenses.

Key Points

The Fund uses a proprietary quantitative investment approach, Stratified Sampling with Optimization, that attempts to replicate, before expenses, the characteristics and performance of the Russell 2000 Index.
Stratified sampling statistically identifies a sample of more liquid equity securities included in the Russell 2000 Index. Selected securities are optimized to construct a portfolio that mimics as closely as possible the market capitalization, industry weightings and other key fundamental characteristics of the Index.
Stratified Sampling with Optimization allows construction of a portfolio using the most liquid names in the Russell 2000 Index in order to minimize transaction costs, while still achieving fundamental portfolio level characteristics very close to those of the Russell 2000.

Sub-Advisor

The Fund seeks its investment objective by investing all of its investable assets in the Master Small Cap Index Series, a portfolio of the Quantitative Master Series Trust, which is managed by BlackRock Advisors, LLC. BlackRock Advisors, LLC on behalf of the Series, has a sub-advisory agreement with BlackRock Investment Management, LLC.

This fund is closed to new investors effective September 1, 2010.

Investing in the securities of small capitalization companies involves greater risk and the possibility of greater price volatility than investing in larger capitalization and more established companies. Please see the prospectus for a complete discussion of the Fund’s risks. There can be no assurances that the investment objectives of this Fund will be met.

American Beacon Funds and American Beacon Small Cap Index Fund are service marks of American Beacon Advisors, Inc.

TOTAL RETURNS

Share Class	Inception Date	Prior Class Inception Date	CUSIP	Symbol	NAV	QTR	YTD	1 Year	3 Year*	5 Year*	10 Year / Since Inception*
Institutional	07/31/2000		02368A539	ASCIX	15.20	12.43	12.43	16.31	13.42	8.28	11.40

Benchmark	QTR	YTD	1 Year	3 Year*	5 Year*	10 Year / Since Inception*
Lipper Small-Cap Core Funds Index	11.85	11.85	15.86	13.36	8.39	11.53
Russell 2000 Index	12.39	12.39	16.30	13.45	8.24	11.52

Expense Ratios

Share Class	Gross	Net¹
Institutional	0.26	0.26

Performance shown is historical and is not indicative of future returns. Investment returns and principal value will vary, and shares may be worth more or less at redemption than at original purchase. Performance shown is as of date indicated, and current performance may be lower or higher than the performance data quoted. To obtain performance as of the most recent month end, click here.

Important Information: Please note that the recent growth in the stock market has helped produce short-term returns that are not typical and may not continue in the future. Indexes are unmanaged and one cannot invest directly in an index.

*Annualized.

The Lipper Small-Cap Core Funds Index tracks the results of the 30 largest mutual funds in the Lipper Small-Cap Core Funds category. Lipper is an independent mutual fund research and ranking service.

The Russell 2000 Index is an unmanaged index comprised of approximately 2,000 smaller-capitalization stocks from various industrial sectors. The index is a registered trademark of Frank Russell Company.

American Beacon Funds and American Beacon Small Cap Index Fund are service marks of American Beacon Advisors, Inc.

Sector Weightings (%)

Financials	23.6
Information Technology	16.3
Industrials	15.2
Consumer Discretionary	13.7
Health Care	12.2
Energy	6.1
Materials	5.3
Consumer Staples	3.5
Utilities	3.3
Telecommunications	0.6

May not equal 100% due to rounding.

Portfolio Statistics	Fund
Price-to-Earnings Ratio (P/E)	24.8
Price-to-Book Ratio (P/B)	3.6
Weighted Average Market Cap ($)	1,510,000,000

3-Year Risk Summary	Fund
R2	99.99
Alpha	N/A
Beta	1.00
Sharpe Ratio	N/A
Standard Deviation	19.84

Top 10 Equity Holdings (%)

Gulfport Energy Corp.	0.3
Dril-Quip, Inc.	0.3
CommVault Systems, Inc.	0.3
Starwood Property Trust, Inc.	0.3
Ocwen Financial Corp.	0.3
Genesee & Wyoming, Inc.	0.3
Axiall Corp.	0.3
Pharmacyclics, Inc.	0.3
Alaska Air Group, Inc.	0.3
Two Harbors Investment Corp.	0.3
Total Fund Holdings:	1969

The P/E Ratio of a stock is calculated by dividing the current price by forecasted twelve-month earnings per share. The P/B Ratio of a stock is calculated by dividing the current price by book value per share. R-squared (R2) is the percentage of the Fund’s three-year return that is explained by movements in its benchmark index. Alpha is a measure of the Fund’s expected performance versus the benchmark, adjusted for relative risk. Beta is a measure of the Fund’s volatility versus the benchmark. Sharpe Ratio is a measure of the Fund’s return per unit of total risk. Standard Deviation is a measure of the historical volatility of the Fund’s returns.

American Beacon Funds and American Beacon Small Cap Index Fund are service marks of American Beacon Advisors, Inc.

Equities	97.7
Cash & Futures	2.3

Mutual Funds

American Beacon Small Cap Index Fund

Portfolio information as of March 31, 2013

Investment Objective

Key Points

Sub-Advisor

Fund Materials

Total Fund Assets

TOTAL RETURNS

Expense Ratios

Sector Weightings (%)

Portfolio Statistics

3-Year Risk Summary

Top 10 Equity Holdings (%)

Asset Allocation (%)

Mutual Funds

American Beacon Small Cap Index Fund

Portfolio information as of March 31, 2013

Investment Objective

Key Points

Sub-Advisor

Fund Materials

Total Fund Assets

TOTAL RETURNS

Expense Ratios

Sector Weightings (%)

Portfolio Statistics

3-Year Risk Summary

Top 10 Equity Holdings (%)

Asset Allocation (%)

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