Warren Buffett’s investing tip for LeBron James: Stick with an index fund By: MarketWatch March 02, 2015 at 10:12 AM EST Warren Buffett isn’t recommending stock picking, real estate or gold to LeBron James. He says go with an index fund. Read More >> Related Stocks: Berkshire Hathaway Berkshire Hathaway S&P 500 ETF Vanguard S&P 500 Ishares Core ETF SPDR S&P 500 ETF Trust