Benzinga and Yahoo Finance LLC may earn commission or revenue on some items through the links below. When Bill Gates cautioned Satya Nadella that Microsoft Corporation's (NASDAQ:MSFT) $1 billion OpenAI investment could go up in flames, few could have imagined it would turn into a$135 billion stake. From Lighting Money On Fire To A $135 Billion Win Microsoft shares climbed nearly 2% Tuesday after the company unveiled a new chapter in its partnership with OpenAI, converting its stake into a 27% ownership i ...