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Fight inflation with less interest rate risk. Short Duration Inflation Protection Bond is actively managed to help investors combat the corrosive effects of domestic inflation and mitigate interest rate risk through a broadly diversified portfolio of short-term inflation-indexed bonds and other fixed income securities.

/sd/customer/portfolio_json 1.800.345.2021

History of Fighting Inflation

At least 80% of the fund's assets are invested in inflation-indexed bonds, which are the only securities to guarantee a return equal to the rate of inflation. The fund is actively managed and has a track record of outpacing inflation on a rolling three-year basis.*

Helps Mitigate Interest Rate Risk

We manage Short Duration Inflation Protection Bond’s duration to help reduce volatility associated with rising interest rates. Using duration as a guide, Short Duration Inflation Protection Bond shareholders are exposed to half of the interest-rate risk compared to its inflation-protected bond category peers.*

Outperformance During the Credit Crisis

Short Duration Inflation Protection Bond gained 2.38% while its category peers lost an average of -0.73% during the Credit Crisis (10/9/2007 to 3/9/2009).* This was due in part to the fund's comprehensive risk controls, which are designed to help mitigate undue risk.

*Short Duration Inflation Protection Bond has consistently outpaced inflation

A Note About Risk

Investments in fixed income securities are subject to the risks associated with debt securities including credit, price and interest rate risk. In certain interest rate environments, such as when real interest rates are rising faster than nominal interest rates, inflation-protected securities with similar durations may experience greater losses than other fixed income securities. Interest payments on inflation-protected debt securities will fluctuate as the principal and/or interest is adjusted for inflation and can be unpredictable. There is no guarantee that the investment objectives will be met. Dividends and yields represent past performance and there is no guarantee that they will continue to be paid.

Past performance is no guarantee of future results.

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Rating & Rankings

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For each fund with at least a three-year history, Morningstar calculates a Morningstar RatingTM based on a Morningstar Risk-Adjusted Return measure that accounts for variation in a fund's monthly performance (including the effects of sales charges, loads and redemption fees), placing more emphasis on downward variations and rewarding consistent performance. Morningstar ratings are based upon Investor class of shares, unless otherwise indicated. The top 10% of funds in each category receive 5 stars, the next 22.5% receive 4 stars, the next 35% receive 3 stars, the next 22.5% receive 2 stars and the bottom 10% receive 1 star. (Each share class is counted as a fraction of one fund within this scale and rated separately, which may cause slight variations in the distribution percentages.) The Overall Morningstar RatingTM for a fund is derived from a weighted average of the performance figures associated with its three-, five- and ten-year (if applicable) Morningstar RatingTM metrics. Past performance is no guarantee of future results.

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Fund Management

Data reflects past performance for Investor Class shares, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value fluctuates. Redemption value may be more or less than original cost. Obtain performance data current to the most recent month end. For additional share class information, consult the prospectus.

Investments in fixed income securities are subject to the risks associated with debt securities including credit, price and interest rate risk. In certain interest rate environments, such as when real interest rates are rising faster than nominal interest rates, inflation-protected securities with similar durations may experience greater losses than other fixed income securities. Interest payments on inflation-protected debt securities will fluctuate as the principal and/or interest is adjusted for inflation and can be unpredictable.

W2 If your account falls below the minimum balance, you will be notified and given 90 days to meet the minimum. If the deadline is not met, American Century Investments may redeem the shares in the account and send the proceeds to the address of record.

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Expense ratios provided are the funds' total annual operating expense ratios, gross of any fee waivers or expense reimbursements. Expense ratios are as of the funds' most current prospectus.

Lipper rankings are based on average annual total returns. Portions of the mutual fund performance information contained on this page were supplied by Lipper, a Reuters Company, subject to the following: Copyright 2015 © Reuters. All rights reserved. Any copying, republication or redistribution of Lipper content, including by caching, framing or similar means, is expressly prohibited without the prior written consent of Lipper. Lipper shall not be liable for any errors or delays in the content, or for any actions taken in reliance thereon. Performance data is preliminary and subject to revision. Rankings are based on all classes available within the classification as of the date shown. Rankings are based only on the universe shown.

©2015 Morningstar, Inc. All Rights Reserved. Certain information contained herein: (1) is proprietary to Morningstar and/or its content providers; (2) may not be copied or distributed; and (3) is not warranted to be accurate, complete or timely. Neither Morningstar nor its content providers are responsible for any damages or losses arising from any use of this information.

Quick Facts

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Distribution