Shares of Coherent fell 11.63% on Monday, sliding from $379.13 to $335.05 and wiping out part of a 44.22% surge over the previous week. The pullback came just days before Coherent is set to report Q4 FY2026 results on August 12 after the close.
That move matters because the stock had already run hard. COHR was up 105.41% year to date before Monday’s drop, leaving investors with a sharp reminder that even a leader in a hot AI trade can reverse fast when expectations get crowded.
The setup going into earnings helps explain why traders were watching so closely. The full-chain put/call ratio stood at 1.22, while the August 14 expiration ratio was 1.33, and post-earnings put open interest of 7,972 exceeded call open interest of 6,227. In plain terms, the options market was paying for downside protection before the report, not chasing another easy upside leg.
Coherent also came into the week with a strong operating backdrop. In the last quarter, it reported non-GAAP EPS of $1.41 on revenue of $1.805 billion, with sales rising 20.5% from a year earlier. The Datacenter & Communications segment climbed 40.6% to $1.361 billion and accounted for 75% of total revenue, while management guided Q4 revenue to $1.91 billion to $2.05 billion.
Still, Monday’s selloff arrived without a confirmed negative catalyst. No new company release, analyst action or macro headline was tied to the move, which makes the drop look more like profit-taking after an extreme run than a fresh break in the story. That fits the stock’s history: Coherent’s last miss in Q4 FY2025 produced a 19.61% day-of decline, so traders know this name can move violently when expectations shift.
The social-media debate only added to the positioning pressure. @jukan05 wrote that the market ultimately has no choice but to go sell memory and stay long optical in the short term, and said he currently has no memory position. Peers LITE and AAOI each gained over 6% in their last session, underscoring how quickly the optics trade has become part of the broader AI argument.
Coherent now heads into August 12 with the stock still deeply higher over the year, but after Monday’s drop the question is not whether investors like the story. It is whether they are willing to pay up for it again after a 44.22% weekly surge and an options market already leaning defensive.
