Berkshire Hathaway (NYSE: BRK-A) (NYSE: BRK-B) CEO Warren Buffett doesn't think his wife should invest in Berkshire stock after he's gone, which may come as a surprise given Berkshire's track record and Buffett's own optimism for the company after he's gone. Charlie Munger, Buffett's right-hand man, disagrees. He thinks Berkshire will put his heirs in the best position to grow their inheritance going forward.Why do they disagree, and who is right?Warren Buffett has said several times that the best investment most people can make is in a low-cost S&P 500 index fund, and he even bet $500,000 that such a fund would beat a portfolio of hedge funds over a decade, a bet he handily won.Continue reading