COHR Bears Press Their Biggest Bet Yet Into a Second Earnings Print

Coherent Corp. heads into its August 14 earnings event in a materially different position than the August 12 print — the stock has recovered sharply, but the short book has not retreated one share.

Since Tuesday's post-earnings close at $328.57, the stock has ripped 8.2% to $355.64. That single-day move reversed much of the damage from the August 11 drop to $325, and the week-on-week gain now stands at 8.4%. Yet short interest climbed to its highest level in the entire 90-day window tracked here — 6.46% of free float, roughly 10.2 million shares on loan, up 14.9% on the week. The previous ORTEX notes documented bears adding into a 44% weekly surge, then surviving a 14% reversal, then holding through a muted post-earnings reaction. The pattern continues: the short book is not covering into this new rally either. What has changed since Tuesday is the price — not the conviction. Borrow availability has tightened from the extraordinary levels of late July (above 3,500%) to roughly 1,407%, which still represents more than fourteen shares available for every one lent out. No mechanical squeeze pressure exists. Cost to borrow remains low at 0.41%, unchanged in direction despite the month-on-month cost rising 31%. Bears are not being forced out by the lending market.

The bull and bear debate is well-established by this point, but the August 14 print gives it fresh stakes. Bulls point to Coherent's positioning at the intersection of AI infrastructure buildout and co-packaged optics demand — the stock is up 76% year-to-date and the consensus carries a buy rating with a mean target near $395, implying roughly 11% upside from current levels. EPS momentum ranks in the 96th–97th percentile over both 30-day and 90-day windows, a signal that forward estimates have been moving sharply higher. Bears counter with the structural risks: heavy reliance on the data center and communications segments, US-China trade exposure, and the ongoing controversy around supplier Innolight. The May print offers a data point — the stock fell nearly 5% the day after results, then recovered 20% over the following five sessions. That precedent suggests the market's initial read on earnings can be wrong in either direction.

Peer context adds a further wrinkle. JBL gained nearly 6% on the day and 4.9% on the week, the only close peer moving in the same direction as Coherent. Most of the correlated group — FN, GLW, TTMI, KN, PLXS — posted weekly declines ranging from 1% to 4.5%. Coherent's outperformance is idiosyncratic, not sector-wide. That makes the August 14 print less a referendum on optical components broadly and more a test of whether Coherent's AI-driven revenue trajectory justifies a valuation that now trades at a P/E of 29x while the bears — running their largest position in three months — wait for the answer.