Warren Buffett Expects This Investment Holding to Balloon to $200 Billion of Berkshire's Portfolio. Hint: It's Not Apple.

This huge investment suggests something about Buffett's opinion of the stock market right now.Warren Buffett manages a massive portfolio for Berkshire Hathaway (BRK.A -1.85%) (BRK.B -1.53%). As of this writing, Berkshire's equity holdings total around $400 billion.By far the largest equity holding in the portfolio is Apple (NASDAQ: AAPL). The Oracle of Omaha poured tens of billions of dollars into Apple stock between 2016 and 2018, amassing a huge stake in the iPhone maker. That stake is now worth around $1 ...