Strategy. The Fund invests primarily in growth stocks issued by companies with mid-sized market capitalizations that Mutual of America Capital Management LLC (the Adviser) believes to possess the potential for capital appreciation, based on a bottom-up fundamental stock selection process. The Advisers investment process includes analysis of a companys business and financial models, as well as understanding its financial statements, to assess the potential for long-term growth in sales and cash flow. The Fund may invest significantly in investments in a particular industry, group of industries or sector, particularly at times when issuers in such industry, group of industries or sector represent a significant portion of the Funds benchmark index. Under normal circumstances, at least 80% of the Funds total assets … Show more… The Fund invests primarily in growth stocks issued by companies with mid-sized market capitalizations that Mutual of America Capital Management LLC (the Adviser) believes to possess the potential for capital appreciation, based on a bottom-up fundamental stock selection process. The Advisers investment process includes analysis of a companys business and financial models, as well as understanding its financial statements, to assess the potential for long-term growth in sales and cash flow. The Fund may invest significantly in investments in a particular industry, group of industries or sector, particularly at times when issuers in such industry, group of industries or sector represent a significant portion of the Funds benchmark index. Under normal circumstances, at least 80% of the Funds total assets are invested in mid-cap growth stocks, which the Adviser defines as those that have market capitalizations that fall within the market capitalization range of companies in the Russell Mid Cap Growth Index or other widely recognized indices of mid cap growth companies, and at least 85% of the Funds total assets are invested in equity securities. Show less