** AI cloud computing firm CoreWeave CRWV.O shares jump 11.9% to $115
** Citigroup upgrades rating to 'buy' from 'neutral'; says they have a stronger picture on AI demand highlighted by Microsoft MSFT.O results
** Brokerage adds that existing multi-year contracts with MSFT, OpenAI and others will drive revenue growth
** Wall Street's AI heavyweights fuel $500 bln gain in stock market value with results from MSFT and Meta Platforms META.O showing investments in tech paying off
** Morgan Stanley raises PT on CRWV to $91 from $58; says given the strong demand backdrop, business momentum and impressive Q1 upside, they expect a strong beat of expectations
** Co closes $2.6 bln secured debt financing, strengthening its market position as AI cloud leader
** Average rating of 24 analysts is "hold"; median PT is $80
(Reporting by Twesha Dikshit)
((Twesha.Dikshit@thomsonreuters.com))