Key Highlights

● Super Micro fell on October 22, giving back its rally from the previous session.

● Super Micro builds servers and rack-scale systems packed with AI chips.

● Nvidia closed at $212.21 and was one of the biggest drags on the S&P 500.

● The VIX rose 2.35 points to 19.03.

Super Micro Computer (NASDAQ:SMCI) fell on Thursday, October 22, 2026, as AI server stocks reversed Wednesday's gains and the S&P 500 had its worst day since July. The server maker gave back its rally from the previous session, with no company-specific news to explain the move.

Super Micro designs and builds servers and rack-scale systems packed with AI chips, many of them from Nvidia (NASDAQ:NVDA). Its customers include cloud providers and AI companies building out data centers. That puts the stock right in the path of any change in sentiment about AI spending.

A sharp change in mood

On Wednesday, Super Micro and Dell Technologies (NYSE:DELL) had both rallied. By Thursday, sentiment had flipped after the results from Meta Platforms (NASDAQ:META).

Meta reported record revenue of $64.60 billion, but it narrowed its 2026 capital spending range to $135 billion to $145 billion and posted negative free cash flow of $2.12 billion. Was Meta's first cash outflow in more than a decade. The cost of insuring Meta's debt hit a record.

The concern for server makers is not that buyers have stopped wanting AI capacity. It is that funding all of that capacity may be getting harder. Dell also slumped, giving back its own Wednesday rally.

Nvidia and Lam weigh in

Nvidia's chief executive said, "The demand of the capital is much greater than the availability of the capital." Wells Fargo traders said his comments spooked markets. Nvidia itself was one of the biggest drags on the S&P 500, according to market reports, and closed at $212.21.

Lam Research (NASDAQ:LRCX)'s guidance, which cited supply constraints, hit chipmakers and equipment stocks. Lam's chief executive said clean-room and component constraints will "limit chip makers and equipment companies' ability to fully meet end demand" into 2027. The Philadelphia Semiconductor Index had its biggest one-day drop since June 23.

The market backdrop

The S&P 500 fell 93.74 points to 7,663.43. The Nasdaq Composite dropped 694.00 points to 26,008.86, its steepest decline since June 5, ending a seven-session winning streak. The Dow Jones Industrial Average edged up 11.89 points to 52,867.98, and the Russell 2000 rose 3.01 points.

The selling was concentrated. About two of every three S&P 500 stocks rose, according to market reports, and the equal-weight version of the index gained. Consumer staples had their best day since April 2025 and hit a record. Health care also set a record. The VIX, Wall Street's fear gauge, rose 2.35 points to 19.03. Volume was heavy, with 18.79 billion shares traded on US exchanges against a 17.19 billion average over the prior 20 sessions, according to market data.

Super Micro Awaits the Hyperscaler Budgets

The next big test for AI server demand comes from the hyperscalers. Microsoft (NASDAQ:MSFT) and Alphabet (NASDAQ:GOOGL) report on October 28, and Amazon (NASDAQ:AMZN) reports on October 29. Their capital spending plans will set expectations for server makers such as Super Micro.

The Federal Reserve announces its rate decision on October 28, with third-quarter GDP and September PCE inflation data due on October 29.

Traders will also watch whether the AI trade stabilizes. In evening trading, Nasdaq-100 futures were slightly lower at 29,083.75, according to market data, while S&P 500 futures were roughly flat.