Warren Buffett's Berkshire Hathaway sees its market value surge to a new record of almost $800 billion

• Shares of Warren Buffett's Berkshire Hathaway ended Monday's trading at all-time highs.
• That's boosted the investment conglomerate's market value to an unprecedented high of almost $800 billion.
• Buffett has overseen a roughly 4,300,000% gain in Berkshire stock since becoming CEO in 1965. 

Shares of Warren Buffett's Berkshire Hathaway ended Monday's trading at all-time highs as the investment conglomerate continues to outperform itself.