Wall Street closed the week on a sour note Friday as an extended selloff in the technology sector dragged the major indexes sharply lower. The S&P 500 fell about 1.1 percent to finish near 7,659, the Nasdaq Composite tumbled 2.2 percent to about 26,138, and the Dow Jones Industrial Average slipped 0.4 percent to around 52,000. The damage was concentrated in AI-linked names, where worries about the ballooning cost of financing artificial intelligence collided with hotter-than-expected inflation data and crude oil prices holding above $100 a barrel.

The catalyst for the tech rout was financing anxiety. Reports that some investors are weighing a valuation of about $1.5 trillion for Anthropic's upcoming IPO, well below the $2 trillion previously expected, rattled a market whose year has been built on AI enthusiasm. While the S&P 500 is up about 12 percent in 2026, most of that gain has come from AI-related megacaps; the index's median component has climbed only about 6 percent, and roughly 185 S&P 500 stocks have lost ground this year. When the AI trade wobbles, the headline index feels it disproportionately.

Earnings season is about to test whether the AI narrative still has legs. Third-quarter reporting shifts into high gear next week with results from Tesla, Meta Platforms and Procter & Gamble, and analysts on average expect quarterly earnings to surge more than 30 percent, driven by AI-related megacaps, according to LSEG data. That is an extraordinarily high bar. Any company that fails to justify its valuation risks the same treatment Tesla received Friday: shares fell 2.1 percent after the electric-vehicle maker unveiled a redesigned Roadster powered by rocket-style thrusters developed with SpaceX, a launch that failed to impress investors.

Not every sector shared the pain. Energy names surged as Brent crude held above $100, with Exxon rising 2.5 percent and Chevron adding 2.6 percent. Alcoa gained 2.5 percent and Travelers added 1.5 percent after both companies reported quarterly results that topped Wall Street forecasts. High oil prices tend to weigh on the price-to-earnings multiples investors are willing to pay for stocks, as one strategist put it, which explains the rotation: investors hedged the inflation risk by buying the companies that benefit from it, and sold the long-duration growth names most vulnerable to it. Investors watching the selloff should weigh what warning signs say about selloff risk rather than guessing the bottom, and compare momentum signals versus traditional indicators before assuming the AI trade is finished.

Netflix offered a reminder that company-specific news still moves stocks in any market. The streaming giant dipped after appointing former Disney executive Peter Rice as chief content officer on Thursday, a leadership change that investors received coolly. Meanwhile, data-security firm Varonis Systems climbed 2.3 percent after Thoma Bravo's Proofpoint agreed to acquire it in a $6.3 billion all-cash deal. In a market where the index-level story is dominated by AI and rates, these individual movers show that stock picking, the old-fashioned kind, still has room to work.

The backdrop for next week is unforgiving: a Fed blackout period beginning October 17 means twelve days without any official central-bank commentary, so every data point and earnings call gets read as a clue about the October 27-28 meeting. A 30 percent earnings growth season could yet rescue the rally, but the market is demanding proof, not promises. Until then, every earnings call is a referendum on the AI trade, and the market has shown it will punish anything short of excellence.