Warren Buffett's investment in his Apple has easily exceeds his personal fortune.<br />Buffett owns investment conglomerate Berkshire Hathaway.<br />The company spent about $35 billion to buy 245 million Apple shares.<br />Those shares are now worth about $122 billion, representing a gain of more than $80 billion.<br />Buffett's net worth has sunk by $11 billion this year to $78 billion.<br />The decline reflects a drop in Berkshire's share price and his philanthropy.<br />Berkshire's Apple stake is worth more than four times as much as its Bank of America position, the second-largest holding in its portfolio.
