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- Microsoft shares climbed as much as 2% on Monday, marking a new all-time intraday.
- The gain came after Satya Nadella said that former OpenAI CEO Sam Altman would join the company.
- The stock increase added $54 billion in market value to Microsoft at daily highs.
Microsoft's stock price hit an all-time high Monday, as investors reacted to former OpenAI CEO Sam Altman joining the Big Tech giant.
Shares climbed as much as 2% to $377.10 before paring to a 1% gain around 10:30 a.m. ET on. That increase added $54 billion of market value to the tech giant and extended its torrid year-to-date stock gain to 57%.