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. These costs, which are not
reflected in annual fund operating expenses or in the example, affect the Fund’s performance.
During the most recent fiscal year, the Fund’s portfolio turnover rate was 111% of the average value of its portfolio.
Principal Investment Strategies
American Century Investment Management, Inc. (the “Sub-Adviser”) serves as the Fund’s sub-adviser. The Sub-Adviser is responsible for the day-to-day management of the Fund’s assets.
The Fund invests substantially all of its assets in investment-grade debt securities. An investment-grade security is one that has been rated by an independent rating agency in its top four credit quality categories or, if unrated, determined by the advisor to be of comparable credit quality. To help protect against U.S. inflation, under normal conditions the Fund will invest over 50% of its assets in inflation-indexed debt securities. These securities include inflation-indexed U.S. Treasury securities, inflation-indexed securities issued by U.S. government agencies and instrumentalities other than the U.S. Treasury, and inflation-indexed securities issued by other entities such as corporations and foreign governments. Inflation-indexed securities are designed to protect the future purchasing power of the money invested in them. The Fund also may invest in debt securities that are not inflation-indexed such as corporate bonds and notes, bank loans, commercial paper, and mortgage- or asset-backed securities.
The Fund also may invest in derivative instruments, provided that such investments are in keeping with the Fund’s investment objective. For example, the Fund may use swap agreements to manage or reduce the risk of the effects of inflation with respect to the Fund’s position in non-inflation-indexed securities. The Fund also may enter into foreign currency exchange transactions for hedging purposes or to enhance returns. The Fund may also invest in collateralized debt obligations, collateralized loan obligations, and similarly structured investments. Under normal conditions, collateral loan obligations owned by the Fund may include covenant light loans.
The Sub-Adviser is not limited to a specific weighted average maturity range. However, the Sub-Adviser monitors the Fund’s weighted average maturity and seek to adjust it as appropriate, taking into account market conditions, the current inflation rate and other relevant factors.
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Market Risk. The value of portfolio investments may decline. As a result, your investment in
the Fund may decline in value and you could lose money.
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Issuer Risk. The prices of, and the income generated by, portfolio securities may decline in response to various factors directly related to the issuers of such securities.
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Bond/Fixed-Income Exposure Risk. Fixed income prices can fall because of various factors affecting the particular fixed income or due to
general weakness in the overall bond markets. Fixed income are subject to varying levels of credit risk, interest rate risk, liquidity risk and volatility.
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Interest Rate Risk. When interest rates change, fixed income securities (i.e., debt
obligations) generally will fluctuate in value. These fluctuations in value are greater for fixed income securities with longer maturities or durations.
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Credit Risk. Credit risk is the risk that the issuer of a debt obligation will be unable or unwilling to make interest or principal payments on time. Credit risk is often gauged by “credit ratings” assigned by nationally recognized statistical rating organizations (NRSROs). A decrease in an issuer’s credit rating may cause a decline in the value of the issuer’s debt obligations. However, credit ratings may not reflect the issuer’s current financial condition or events since the security was last rated by a rating agency. Credit ratings also may be influenced by rating agency conflicts of interest or based on historical data that are no longer applicable or accurate.
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Mortgage-Backed Securities Risk. The value of mortgage-backed securities (commercial and
residential) may fluctuate significantly in response to changes in interest rates. During periods of falling interest rates, underlying mortgages may be paid early, lowering the potential total return (pre-payment risk). During periods of rising interest rates, the rate at which the underlying mortgages are pre-paid may slow unexpectedly, causing the maturity of the mortgage-backed securities to increase and their value to decline (maturity extension risk).
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Asset-Backed Securities Risk. Issuers of asset-backed securities may have limited ability to enforce the security interest in the
underlying assets, and credit enhancements provided to support the securities, if any, may be inadequate to protect investors in the event of default. Like mortgage-backed securities, asset-backed securities are subject to prepayment and extension risks.
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Prepayment and Extension Risk. Mortgage-backed securities, other asset-backed securities, or any debt instrument with an embedded call
option are subject to prepayment risks because the principal on the security may be prepaid at any time. This could reduce the securities’ yield and market
value.
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Collateralized Debt Obligations (CDOs) Risk. The risks of an investment in a CDO depend
largely on the type of collateral held by the special purpose entity (SPE) and the tranche of the CDO in which the Fund invests. Investment risk may also be affected