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Effective August 31, 2016, the Fund’s Institutional Class shares were redesignated as Class Y shares. Accordingly, the returns shown in the table for Class Y shares prior to August 31, 2016 are those of Institutional Class shares. The Fund revised its investment strategies on May 28, 2010; performance may have been different had the current investment strategies been in place for all periods shown.

Class N shares of the Fund are subject to a $1,000,000 initial investment minimum. There is no initial investment minimum for Certain Retirement Plans and funds of funds that are distributed by Natixis Distribution, LLC (the “Distributor”).

¹ As of the most recent prospectus, the investment advisor has contractually agreed to waive fees and/or reimburse expenses (with certain exceptions) once the expense limitation of the fund has been exceeded. This arrangement is set to expire on 1/31/26. When an expense limitation has not been exceeded, the fund may have similar expense ratios and/or yields.

²The 30-day SEC yield is a standardized calculation, calculated by dividing the net investment income per share for the 30-day period by the maximum offering price per share at the end of the period and annualizing the result. Treasury Inflation-Protected Securities (TIPS) are designed to provide protection against inflation through monthly adjustments to the principal value of TIPS, which increases with inflation and decreases with deflation as measured by the Consumer Price Index. Monthly principal adjustments for inflation (increases and decreases) are excluded from the 30-day SEC yield calculation. Such adjustments can vary substantially from one month to the next, and if they were included, may materially impact the 30-day SEC yield either higher or lower. A subsidized 30-day SEC yield reflects the effect of fee waivers and expense reimbursements. The SEC yield is not based upon distributions of the fund and actual income distributions may be higher or lower than the 30-day SEC yield amounts. During periods of unusual market conditions and/or activity in the sales or redemptions of fund shares, the fund’s 30-day SEC yield amounts may be materially higher or lower than its actual income distributions. Unsubsidized 30-day SEC yield is calculated using the gross expenses of the fund. Gross expenses do not include any fee waivers or reimbursement.

The Bloomberg US Intermediate Government/Credit Bond Index includes securities which have a remaining maturity of 1-10 years and includes Treasuries (public obligations of the US Treasury that have remaining maturities of more than one year) and agencies (publicly issued debt of US Government agencies, quasi-federal corporations and corporate or foreign debt guaranteed by the US Government), as well as other publicly issued investment grade corporate and non-corporate debentures that meet specified maturity, liquidity, and quality requirements. Indexes are unmanaged. It is not possible to invest directly in an index.