How Sir Charlie Munger lose over $7 billion due to an act of omission!?

How Sir Charlie Munger lose over $7 billion due to an act of omission!? Charlie Munger is one of the greatest investors, and along with Mr. Warren Buffett, he runs the business empire "Berkshire Hathaway." In 1977, Mr. Munger was offered to buy shares of an oil company called "Belridge." Mr. Munger purchased 300 shares for 115 dollars each. He was offered another tranche of 1500 shares, but Mr. Munger refused to buy them, citing the unavailability of cash. A few years later, Mr. Munger was a