US stock futures stalled on Thursday as Nvidia's (NVDA) stellar earnings failed to impress investors, as Wall Street juggles growing worries over AI's potential for payoff and disruption.

Dow Jones Industrial Average futures (YM=F) slipped just below the flatline, following solid wins for stocks more broadly on Wednesday. Contracts on the S&P 500 (ES=F) and the tech-exposed Nasdaq 100 (NQ=F) were also little changed.

Nvidia shares jumped following its after-hours report Wednesday, but pared gains amid a lukewarm response from investors. The AI chipmaker posted big beats on quarterly revenue and profit, and its guidance also came in above expectations. But a lack of detail on drivers for the outlook — which doesn't include potential revenue out of China — left some on Wall Street asking questions about competitive threats and the staying power of AI buildout demand.

Fears of a AI bubble and the "AI scare trade" have buffeted stocks in recent weeks, with the technology's challenge to sectors such as legacy software coming to the fore. Salesforce (CRM) shares fell about 4% to continue an AI-driven sell-off after its revenue forecast fell short of estimates.

Looking ahead on the economic calendar, investors will parse weekly jobless claims data due Thursday, followed by January’s producer price index report on Friday.

Wall Street also continues to see earnings come through, with full-year results from Big Three automaker Stellantis (STLA, STLAM.MI) expected before the bell. Quarterly reports from Warner Bros. Discovery (WBD), Dell Technologies (DELL) and CoreWeave (CRWV) are also slated for Thursday.