US stocks lose their footing at the open as tariff and AI worries take hold again. Marvell Technology sees a slowdown in data center business.

Shares of Marvell Technology (MRVL 2.05%), which makes semiconductors for the data infrastructure market, dropped 14.9% in Wednesday's after-hours trading session following the co

The strong results helped to ease concerns about beaten-down AI stocks, which surfaced yesterday after fellow chipmaker Marvell Technology Inc. only just delivered to expectations and fell sharply Thursday morning.

Key Takeaways U.S. equities dipped at midday as confusion over the new tariffs by President Donald Trump led to market uncertainty.Artificial intelligence chip shares tumbled following Marvell Technology's results.

Semiconductor stock Marvell Technology Inc (NASDAQ:MRVL) is up 2.7% to trade at $88.13 at last glance, brushing off today's headwinds, though it was earlier on track for its seventh loss in nine days.

Marvell stock is getting crushed after posting its Q4 results yesterday. Sales, earnings, and guidance actually beat the average Wall Street targets. But investors apparently wanted bigger performance beats in order to support the stock's valuation amid wider risk factors.

Nvidia (NASDAQ: NVDA) stock is getting hit with sell-offs in Thursday's trading. The company's share price was down 5.1% as of 2 p.m. ET amid a 2% decline for the S&P 500 and a 2.5% decline for the Nasdaq Composite.

The chipmaker fell sharply early Thursday as its slight earnings outlook failed to impress investors looking for a boost to the AI trade.

Uncertainty about the impact of new U.S. tariffs weighed on stocks, along with worries about tightening chip export curbs, and competition from China as Alibaba unveiled its latest AI reasoning model, which it said rivals offerings from DeepSeek and ChatGPT maker OpenAI. Alibaba shares climbed about 1%.

The AI chipmaker offered an upbeat second-quarter outlook that was a silver lining in the otherwise downtrodden AI trade.