** Shares of Nvidia-backed CoreWeave CRWV.O up 4.2% to $106.8 premarket

** Barclays raises co’s PT to $100 from $70, the highest among 18 analysts covering the stock

** We continue to like the role Coreweave is playing in the new GenAI world, says brokerage

** Last week, Aston Martin Aramco announced Coreweave as official AI cloud computing partner

** However, brokerage downgrades co to "equal weight" from "overweight" on concerns over high valuation and absence of near-term growth catalysts, despite strong business momentum

** "We see valuation at levels that could be stretched to move higher off fundamentals in the near term," says Barclays

** As of last close, CRWV had doubled from its March IPO price

** Analysts' average rating is equivalent of "hold"; median PT is $70 - data compiled by LSEG

(Reporting by Rashika Singh in Bengaluru)

((Rashika.Singh@thomsonreuters.com;))