Principal Diversified Real Asset Fund Class R-6

The investment seeks a long-term total return in excess of inflation. Under normal circumstances, the fund invests at least 80% of its net assets, plus any borrowings for investment purposes, in investments related to real assets and real asset companies. It allocates its assets among general investment categories related to real assets, which include tangible assets and investments that are expected to perform well in periods of rising or high inflation, such as the following: infrastructure, natural resources, commodities, real estate, inflation-indexed bonds, and floating rate debt.