Key Highlights

● TTM traded at about $72.76 in early afternoon on October 22.

● Third-quarter revenue of $1.20 billion beat the $1.12 billion consensus.

● Adjusted earnings of $1.46 a share beat the $1.26 forecast.

● Fourth-quarter revenue guidance of $1.42 billion to $1.44 billion trailed consensus at the midpoint.

TTM Technologies (NASDAQ:TTMI) plunged on Thursday, October 22, 2026, one of the hardest-hit names in the S&P MidCap 400, even though the circuit-board maker had just delivered a third quarter well ahead of Wall Street's expectations. The stock traded at about $72.76 in the early afternoon, after opening the day sharply lower and sinking further as the session wore on. Reports differed on the size of the move, but all showed the decline deepening through the day.

A strong quarter

On the numbers that looked backward, TTM shone. Third-quarter revenue rose to $1.20 billion, far above the year-earlier level and comfortably ahead of the $1.12 billion consensus. Adjusted earnings came in at $1.46 per share, beating the $1.26 forecast.

The company also completed two acquisitions, Swiss Technology Group and Epiq Solutions. Three days earlier, it had agreed to buy MKS Inc. (NASDAQ:MKSI)'s Ophir Optics unit for about $650 million in cash.

Where it went wrong

The problem was the outlook. TTM guided fourth-quarter revenue to $1.42 billion to $1.44 billion, against a consensus of $1.44 billion, so the midpoint trailed the consensus estimate. Fourth-quarter adjusted earnings guidance was set at $1.77 to $1.83 per share.

Guidance that only roughly matched expectations was met with heavy selling. Market commentary also suggested that heavy capital spending and debt costs tied to acquisitions weighed on sentiment.

By Thursday's low, the stock was trading far below its June 2026 52-week high of $221.47.

Caught in the AI hardware rout

Timing made things worse. Thursday was a terrible day for technology hardware stocks, and TTM's slide came as the selloff in AI-linked names deepened.

The report from Meta Platforms (NASDAQ:META) late on Wednesday showed 2026 capital expenditure of $135 billion to $145 billion and negative free cash flow, sparking worries about how the AI boom will be financed. Lam Research (NASDAQ:LRCX)'s December-quarter guidance flagged supply constraints that its chief executive said would limit chip makers' ability to fully meet demand into 2027.

The Philadelphia Semiconductor Index suffered its biggest one-day drop since June 23. AI hardware names such as Amphenol (NYSE:APH), Corning (NYSE:GLW) and Dell (NYSE:DELL) all fell sharply, and the iShares AI Innovation ETF slid.

The broader market

The Nasdaq Composite fell 694.00 points to 26,008.86, its steepest decline since June 5, and the S&P 500 dropped 93.74 points to 7,663.43, its worst day since July. The Dow Jones Industrial Average ended essentially flat.

Money flowed instead into consumer staples, health care, utilities and homebuilders, and Treasuries rallied, sending the 10-year yield back below a closely watched threshold for the first time since September 22.

TTM Must Show Its Guidance Was Conservative

The key question for TTM is whether the fourth-quarter guidance proves conservative. Investors will also watch how quickly the company integrates its recent acquisitions and closes the Ophir Optics deal, and how it manages the related debt and spending.

The AI trade faces a heavy test next week, with Microsoft (NASDAQ:MSFT) and Alphabet (NASDAQ:GOOGL) reporting on October 28 and Amazon (NASDAQ:AMZN) on October 29. Their spending plans will go a long way toward setting the tone for technology hardware stocks, TTM included.