U.S. stock index futures extended gains in early trading as investors reacted to fresh signs of durable demand for artificial intelligence infrastructure, with Amazon at the center of the move. The rally in tech and semiconductor-related names followed Amazon's cloud update, which investors interpreted as confirmation that the company's heavy AI investments are beginning to produce measurable commercial traction.
By 05:42 ET (09:42 GMT), futures pointed to modest gains across major averages: Dow Jones Industrial Average futures were up 261 points, or 0.5%, S&P 500 futures had increased by 35 points, or 0.5%, and Nasdaq 100 futures were higher by 317 points, or 1.1%.
Market attention focused on a handful of notable premarket movers.
Amazon surged more than 12% after reporting its strongest cloud-revenue growth in more than four years. The company said that businesses running on Amazon Web Services and powered by its custom AI chips have reached a $25 billion annual revenue run rate. Investors also appeared willing to overlook the company's plan to raise capital expenditures to $220 billion, interpreting Amazon's cloud momentum and the chip-related revenue disclosure as signs that AI investments are translating into concrete customer adoption.
Semiconductor and AI infrastructure suppliers responded to the Amazon update. Marvell Technology shares rose about 7%, while Astera Labs climbed roughly 8%, reflecting investor expectations that growth in Amazon's custom chip business could be a positive signal for vendors involved in AI networking and data center hardware buildouts.
Biotech and clinical news also moved markets. Replimune's stock soared 125.3% after a Food and Drug Administration advisory panel, the Cellular, Tissue, and Gene Therapies Advisory Committee, voted 10-3 in favor of the efficacy of the company's RP1 therapy in combination with nivolumab for advanced melanoma. The panel judged the late-stage trial to have produced clinically meaningful results, a conclusion that differed from concerns raised by FDA staff about the study's design.
Apple weighed on the session despite delivering record quarterly revenue. The company warned that fourth-quarter revenue guidance would fall short of Wall Street expectations and signaled that shortages in advanced chip manufacturing capacity would constrain shipments of iPhone, Mac and iPad devices during the September quarter. Apple shares dropped 7.3% after the cautionary outlook.
Other corporate movers included a number of companies that disappointed investors with guidance or results. Roblox tumbled 16.5% after reporting bookings growth that fell short of expectations, lower-than-forecast daily active users and weak forward guidance; although the company recorded a smaller-than-expected quarterly loss, investors focused on slowing engagement metrics and sharply moderating bookings growth. GoDaddy fell 10.9% after issuing full-year revenue guidance below Wall Street expectations, even as quarterly earnings and revenue beat estimates; investors were concerned the company's growth could slow after a strong run-up. Western Union slid 7.7% after missing quarterly earnings and revenue estimates and lowering its full-year outlook, with margins pressured by weakness in its Americas retail business and delays in completing the Intermex acquisition.
Overall, the market reaction was mixed: AI-related optimism helped drive gains in cloud, semiconductor and AI-infrastructure stocks, while earnings guidance and operational issues at several public companies kept investors selective and reinforced near-term downside risks for names with disappointing outlooks.
Market context and investor focus
Investors appeared to be parsing two competing narratives. On one hand, Amazon's update lent credibility to the view that hyperscaler AI demand can underpin durable revenue streams for cloud providers and their supply chains. On the other hand, disappointing guidance and operational constraints at several large-cap names - most notably Apple - highlighted ongoing execution and supply-chain risks that could temper broader market gains.
Given the mixed signals, market participants may continue to rotate between AI infrastructure beneficiaries and more defensive or beaten-down names depending on incoming earnings commentary and data on manufacturing capacity constraints.
Notable movers mentioned:
- Amazon - strong cloud growth, $25 billion AI-chip revenue run rate, capex increase to $220 billion
- Marvell Technology - up about 7%
- Astera Labs - up about 8%
- Replimune - stock up 125.3% after supportive FDA advisory committee vote
- Apple - shares fell 7.3% after conservative Q4 revenue guidance and warnings about advanced chip supply limits
- Roblox - down 16.5% on weak bookings, DAUs and guidance
- GoDaddy - down 10.9% after below-expectation full-year revenue guidance
- Western Union - down 7.7% after missed results and a reduced full-year outlook
Investors focused on the intersection of AI demand and supply-side constraints. The strength in cloud-related and semiconductor-linked names underscores the market's appetite for companies tied to AI deployments, while guidance-driven declines underscore the importance of execution and supply-chain availability for hardware-dependent product lines.