Cathie Wood and Warren Buffett rarely buy the same stocks, but this budding AI powerhouse is a rare exception.Draw a Venn diagram of stocks held by the family of exchange-traded funds (ETFs) in Cathie Wood's Ark Invest and those held by Warren Buffett's holding company, Berkshire Hathaway, and few are going to be in the intersection. Yet, as is often the case, there's an exception worth noting. In this case, that "exception" is Amazon (AMZN 1.91%).Both of these famed investors continue to own the e-commerce ...