Despite spending a cumulative $78 billion buying shares of his favorite stock since mid-2018, the Oracle of Omaha's attention is currently with three other holdings.

Legendary investor Warren Buffett is sitting on nearly $200 billion in cash, signaling major concerns about the stock market. His favorite stock market indicator suggests that a 40% market crash could be imminent.

Warren Buffett is rightly called the greatest living investor. Since becoming CEO of Berkshire Hathaway (NYSE:BRK-A)(NYSE:BRK-B) in 1965, Buffett has generated cumulative returns 5,502,284%, a nearly 20% annual return,