The U.S. stock market should do well for long-term investors, even if Buffett isn't enthusiastic about its current leadership.

For decades, investors have closely followed Warren Buffett's market commentary, shareholder letters, and discussions at Berkshire Hathaway 's ( BRK.A 0.21% ) ( BRK.B -0.01% ) annual shareholder meetings. These kernels of wisdom help filter out market noise and serve as a reminder to focus on fundamentals.

Despite an identity built around buying businesses and picking winning stocks, Buffett has long advocated that investors who aren't interested in closely following markets may want to consider an S&P 500 ( ^GSPC 0.51% ) index fund as a tool for compounding wealth .

With a staggering 19.9% of the total market cap of the S&P 500 allocat

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