Buffett has eight partnership funds. Buffett will not publicly recommend a stock or fund on any occasion, but there is one exception, which is the only investment product publicly recommended by Buffett, that is, index funds.

Index funds have the advantages of low rate, long life and diversified investment. The developed financial market in the United States has also brought a long-term upward trend of the index, and the market environment in the United States has provided fertile soil for the long-term upward growth of index funds. In the famous ten-year bet, Buffett won the bet through the Standard & Poor's 500 Index.