Performance quoted is past performance and cannot guarantee comparable future results; current performance may be lower or higher. Investment return and principal value will vary so that you may have a gain or a loss when you sell shares.

The Investor Class shares have no sales charge; therefore, performance is at NAV. Investor Class shares are closed to most investors. Please see the prospectus for more details.

The 360-day and 365-day yields represent the standard one-day yields for the fund. 30-day simple yields represent annualized results for the period, net of fees and expenses and exclude any realized capital gains or losses. Average annual total returns reflect reinvested distributions, net of expenses for the periods. The 7-day SEC yield more closely reflects the current earning of the fund than the total returns.

^a The factor is the amount of income per share earned on securities held by the portfolio on a daily basis.

^b Weighted Average Maturity (WAM) - The length of time until the average security in a fund matures or will be redeemed by its issuer. It indicates a fixed income fund's sensitivity to interest rate changes. Longer average weighted maturity implies greater volatility in response to interest rate changes, while shorter average weighted maturity implies less volatility. WAM is calculated in days.

^c Weighted average life (WAL) - A measure of a money market fund's sensitivity to changes in credit spreads and other spread risks. Weighted average life, which is expressed in days, is calculated by summing the remaining maturity of each portfolio security or, when relevant, the number of days until the date of the next demand feature when the fund may receive payment of principal and interest, scaled by that security's share of the portfolio's total value, as measured by amortized cost. Weighted average life differs from weighted average maturity (WAM) in that the weighted average life calculation uses a variable-rate security's final maturity (or the date of the next demand feature); the weighted average maturity calculation uses the security's next interest rate reset date. Thus, weighted average life should always be equal to or greater than the weighted average maturity.

Performance quoted is past performance and cannot guarantee comparable future results; current performance may be lower or higher. Investment return and principal value will vary so that you may have a gain or a loss when you sell shares.

The Investor Class shares have no sales charge; therefore, performance is at NAV. Investor Class shares are closed to most investors. Please see the prospectus for more details.

The 360-day and 365-day yields represent the standard one-day yields for the fund. 30-day simple yields represent annualized results for the period, net of fees and expenses and exclude any realized capital gains or losses. Average annual total returns reflect reinvested distributions, net of expenses for the periods. The 7-day SEC yield more closely reflects the current earning of the fund than the total returns.

^a The factor is the amount of income per share earned on securities held by the portfolio on a daily basis.

^b Weighted Average Maturity (WAM) - The length of time until the average security in a fund matures or will be redeemed by its issuer. It indicates a fixed income fund's sensitivity to interest rate changes. Longer average weighted maturity implies greater volatility in response to interest rate changes, while shorter average weighted maturity implies less volatility. WAM is calculated in days.

^c Weighted average life (WAL) - A measure of a money market fund's sensitivity to changes in credit spreads and other spread risks. Weighted average life, which is expressed in days, is calculated by summing the remaining maturity of each portfolio security or, when relevant, the number of days until the date of the next demand feature when the fund may receive payment of principal and interest, scaled by that security's share of the portfolio's total value, as measured by amortized cost. Weighted average life differs from weighted average maturity (WAM) in that the weighted average life calculation uses a variable-rate security's final maturity (or the date of the next demand feature); the weighted average maturity calculation uses the security's next interest rate reset date. Thus, weighted average life should always be equal to or greater than the weighted average maturity.