Teradyne Shorts Rebuild Into Earnings Week

TER enters its October 27 earnings release with short sellers having quietly rebuilt positions over the past month, even as the stock shed 11.5% this week to close at $336.59.

Short interest has climbed 10.4% over the past 30 days to reach 5.1% of free float, roughly 8 million shares. The build started in mid-September, when SI was running closer to 7 million shares, and has been sustained through October despite a modest 2.4% pullback in borrowed shares this week. The monthly trend is the more meaningful signal: shorts have been adding conviction even as the stock was still near its highs. The most recent FINRA fortnightly settlement figure, as of September 30, put short shares at 8.6 million with a days-to-cover of 3.7, consistent with the current estimate.

The borrow market tells an easier story for bears than the headline might suggest. Availability is extremely loose, sitting at roughly 7,954%, meaning there are far more shares available to borrow than are currently out on loan. That figure has more than doubled over the past week alone. Cost to borrow has edged up 36% week-on-week to 0.51%, but in absolute terms remains negligible. There is no mechanical squeeze pressure here: a short seller wanting to add exposure faces essentially no friction from the lending market.

Options positioning reinforces the cautious mood. The put/call ratio is running at 1.60, above its 20-day average of 1.48 and close to its 52-week high of 1.65. That ratio has drifted steadily higher since mid-September, when it was closer to 1.14. Investors have been adding put protection throughout the stock's recent slide, not just reacting to this week's move.

The Street remains broadly constructive on Teradyne despite the pullback, with a consensus mean price target around $445, implying roughly 32% above the current price. The most recent analyst action of note came in August, when Baird downgraded the stock to Neutral while holding its $420 target, a signal that at least some covering analysts think the risk/reward has narrowed. Earlier moves from Goldman Sachs, UBS, and BofA in June and July had pushed targets sharply higher into the $465 to $525 range, and those remain on the board. Bulls point to AI-driven test demand, with AI applications now cited as contributing over half of semiconductor test revenue, and an improving HDD segment. Bears flag datacenter capex uncertainty, smartphone weakness, and ongoing US-China trade friction as the main drags. Forward earnings momentum has been positive over the past 90 days on the factor scoring, though the 12-month forward EPS picture scores only in the 18th percentile year-on-year, suggesting the growth rate embedded in estimates has come down materially.

The peer group had a similar week. LRCX fell 12.5%, COHU dropped 16%, FORM shed 15.9%, and AMAT lost 12.8%. TER's 11.5% decline was toward the shallower end of a broad semis selloff, not an outlier. Insider activity over the past 90 days has been net negative at roughly -$5.8 million in value terms, driven primarily by open-market sales from the CEO and a director in mid-October, though both transactions were executed under pre-arranged 10b5-1 plans, limiting their informational value as a sentiment signal.

With results due October 27, the week ahead will test whether the monthly short rebuild and elevated put/call ratio reflect genuine earnings concern or simply mechanical hedging ahead of a release where the stock has historically moved sharply: the most recent comparable print on July 29 produced a 14% single-day gain followed by a further 21% over five days.