4,400,000% return and a $168 billion cash pile: Key points from Warren Buffett's letter

Warren Buffett's Berkshire Hathaway has reached a cash reserve of $167.6 billion, surpassing Uber and Nike. Buffett's return of 4,400,000% outpaces S&P 500's 31,000% since 1965. The company's net assets reach $561 billion. The company has seen a dramatic increase in investment income, attributed mainly to the rising interest rates.