A widespread sell-off has swept across U.S. equity markets in recent trading sessions, driven by deepening investor anxiety over the ballooning costs of the ongoing artificial intelligence (AI) infrastructure rollout and the unproven near-term returns on billions of dollars in corporate spending on the technology. The tech-heavy Nasdaq Composite opened Friday trading at its lowest point in more than two months, marking a 2.5% drop that extended losses triggered by a record-shattering single-day slump for Google parent Alphabet just 24 hours prior. Alphabet lost more than $500 billion in market capitalization on Thursday after disclosures that its new AI-powered search summaries were eroding revenue from its core search advertising business, and the stock extended its downward trajectory by a further 1% in early Friday trade. Chip manufacturing giant Intel emerged as the biggest single loser of the session, with its share price plummeting as much as 30% in early Friday trading, putting the firm on track to erase over $130 billion in total market value. The steep drop followed a disappointing third-quarter earnings update that revealed the company expects its cash outflows to exceed its incoming revenue for the full year, alongside a weaker-than-forecast fourth-quarter revenue projection. Intel’s chief financial officer David Zinsner warned in the earnings report that the ongoing personal computing market slowdown would persist at least through the first half of 2025, and confirmed that the firm had already dramatically ramped up capital expenditure on manufacturing equipment in the third quarter, with even larger spending increases planned for the final three months of the year. E-commerce and cloud computing leader Amazon also faced heavy market scrutiny after releasing quarterly earnings late Thursday that fell short of Wall Street consensus expectations. The stock initially tumbled as much as 6% in after-hours trading before paring some losses to sit roughly 1.6% down during Friday’s regular session, after the firm disclosed that its total cash outlays had surged six-fold over a three-month period, pushing its total spending well above its generated revenue for the quarter. Social media platform Reddit saw its stock collapse 26% in Friday trade, after reporting lower-than-projected daily active user figures and issuing a warning that Google’s new AI-enhanced search tools were cutting into the volume of user referrals it receives from search results. Online gaming platform Roblox also suffered a nearly 20% share price drop, driven by underwhelming daily active user metrics for the latest quarter. The wave of disappointing earnings reports from major tech firms this week, including Microsoft, has left market analysts questioning the long-assumed financial payoff from the trillions of dollars in collective industry-wide investment poured into AI development and infrastructure to date. Chris Low, chief economist at investment management firm FHN Financial, noted that the current market downturn is being driven directly by the poor performance of top-tier tech players such as Amazon and Alphabet, which are “showing some pretty significant growing pains as they aggressively pursue the AI build-out.” He added that investor sentiment has shifted sharply toward fears that these early headwinds signal a broader slowdown across the entire technology sector, as the cost of scaling AI infrastructure far outpaces the near-term revenue gains the technology is currently generating.