(Reuters) -U.S. technology stocks failed to hold on their initial gains on Thursday, as a rally driven by Nvidia ran out of steam with concerns of lofty valuations in the technology space coming back to the fore.
Nvidia's shares were last down 2.2% after surging 5% earlier in the day when its stellar results tempered some concerns over a potential AI bubble, although questions about the payoff from the massive spending boom remain.
