Amazon shares put on almost $50 after the online retailer forecast sales above analysts' estimates for the current quarter.
The news lifted the stock as high as $965 after it closed yesterday at $918.38.
The surge carried the net worth of Amazon founder Bezos to $79 billion and it could surpass $80 billion for the first time if Amazon keeps the gains when markets open today.
Bezos only recently climbed to the second position on Bloomberg's Billionaires Index after an earlier jump in the Amazon share price following the company's announcement that it had acquired Middle Eastern e-commerce firm Souq.
Bezos leapfrogged Zara founder Amancio Ortega and Warren Buffett with his fortune late last month priced at $75.6 billion.
His fortune slipped $200 million to $87.1 billion after hours as Microsoft presented mixed results and slowing tablet sales growth.