Teradyne Just Reclaimed Its Lifeline While Retail Sold It—$385 Decides Whether the AI-Test Rally Fires or Fails

A stock down more than a fifth from its record just erased a five-day base at the close. The question isn't whether the selloff is over—it's whether one shelf of overhead supply turns this reclaim into a trap.

Teradyne (TER) opened Tuesday the wrong way. The automated-test-equipment maker gapped below $372, slid to $368.48, and looked like another limp day in a month-long pullback from its all-time high. Then the buyers showed up. The stock climbed all session, tagged $384.45, and closed at $383.69, up 3.1% for the day and 14.4% over the last five sessions.

That reversal happens to land on a real line, not a rounded quote. The $368 zone is where the stock found its low for the day—and where its 50-day moving average sits. A stock whose entire story is the AI buildout spent the last several weeks running from a record high of $487.91 all the way down near $357, shaking out every buyer who chased the peak. Reclaiming the 50-day on a day that opened weak and closed at the high is not noise; it is the first sign the pullback is being absorbed. The clock now runs through one level.

Why this bounce has more behind it than a headline

The reclaim matters because it is happening inside a fundamental story that is already real. Teradyne reported a record second quarter at the end of July: revenue of $1.329 billion, up more than 100% year over year and well above its own $1.15–1.25 billion guidance, with memory test revenue at a record as high-bandwidth-memory and DRAM demand surged. Management forecast another $1.2–1.3 billion for the current quarter, and earnings per share rose roughly 300%.

That is the "why this may persist" side of the setup. The "why this could fail" side is just as visible. The stock trades near a premium to semiconductor peers on a forward multiple roughly 49 times EBITDA by one June read, and this is a name that moves violently in both directions: after a record Q1 beat in April, shares fell 19% the next day. Nothing about this chart guarantees a straight line back toward the record high that is still about 21% above the current price.

The trapped-inventory detail traders may be missing

Look at who paid for Tuesday's reversal and the setup sharpens. Across the session, block orders—the largest institutional prints—showed net buying ($19.8 million in versus $7.4 million out). Retail, by contrast, was a net seller, with more flowing out than in. That is the opposite fingerprint of a top: the biggest participants took down the dip while smaller hands distributed into the bounce.

That matters because it suggests the near-term marginal buyer is not exhausted retail chasing momentum. But it is a fingerprint, not a guarantee—volume shows who traded, and the institutional bid is what needs to keep showing up above $385 for the reclaim to become a breakout rather than a bounce into supply.

The line that decides it

Everything now runs through $385. That is Tuesday's high, and just below the $400 zone where the stock previously carved out a shelf before collapsing. Below $385, the last five days are a dead-cat bounce off the 50-day—impressive, but a bounce. Above it, with participation still expanding, the path opens toward the $400 handle and, eventually, the far more distant record.

The invalidation is tight and earned: a close back under roughly $368 would put the stock back below the 50-day it just fought to reclaim and invite a retest of the $357 swing low. That is what makes this setup tradeable rather than decorative—the reward leg and the failure leg are both defined.

Scenario	Trigger	Path	Invalidation	Horizon
Breakout/reclaim holds	Decisive close above ~$385, preferably on expanding volume	$400 handle, then the empty zone toward the record	Back below ~$368 (50-day)	Days to weeks
Failed reclaim	Rejection at $385 with fading volume	Retest $368, then $357 swing low	A close below $368	Days

Keep the timeframe honest: this is a days-to-weeks call on a completed session, not a new trend call. The weekly structure is still in a recovery from a 21% drawdown, and the stock runs straight into overhead supply within 4% of the current price. That is precisely why $385—not the bull case—is the level that owns the trade.

Hold $368 and the reclaim stays alive, and the next leg targets the $400 shelf. Lose $368 and the bounce is spent and $357 reappears. The setup has a binary verdict, and the next close is the referee.