Coherent’s drop reads like position-clearing after a huge AI rerating, not proof that the operating story has broken. The cleanest reason is simple: the company just posted Q3 FY26 revenue growth of 21% year over year, with Datacenter & Communications jumping to $1.3616 billion from $968.7 million. That is not what demand deterioration looks like. When a stock is already up 80.7% year to date and trading at 118 times trailing earnings, even a strong quarter can trigger a sharp reset without changing the underlying thesis.
The business momentum is still there, and the datacenter segment is doing the heavy lifting. Q3 FY26 revenue reached $1.8056 billion, up from $1.4979 billion a year earlier, while Datacenter & Communications grew by nearly $393 million year over year. That matters more than the day-to-day tape because Coherent is being valued as an AI connectivity enabler, and the latest quarter showed that demand engine still accelerating rather than stalling.
Margins also moved in the right direction, which undercuts the idea that this was a broken print. Non-GAAP gross margin hit 39.6% in Q3, up from 39.0% in Q2, while the broader TickerSpark Score reinforces the same picture: Growth sits at 95, Momentum at 100, and the overall TickerSpark Score is 74. This is not a low-quality bounce story. It is a fast-growing hardware name that has been rerated aggressively because the market now sees it as a real beneficiary of AI networking spend.
The market is also not treating Coherent like an earnings disappointment in any durable sense. The company has beaten EPS estimates in 7 straight reported quarters, including $1.41 versus a $1.39 consensus in May and $1.29 versus $1.21 in February. Analyst posture remains overwhelmingly positive as well, with 24 Buy ratings, 1 Strong Buy, and no Sell ratings, and recent target commentary clustering around roughly $380 to $410. That does not guarantee upside, but it does support the view that this pullback is about cooling expectations after a crowded run, not a broad rethink of the business.
The pushback is easy to see: valuation is rich, and rich stocks get punished first when momentum cracks. COHR trades at 118.01 times trailing earnings, 8.55 times sales, and 50.89 times EV/EBITDA, all while reported net margin is only 7.1% and ROIC is 3.9%. Add in the technical picture, with the stock below its 20-day average and on-balance volume showing distribution, and the market is clearly questioning how much of the AI demand story is already priced in.
That concern is legitimate, especially because margin durability is the one place where bulls still need more proof. Even so, the current evidence still favors the contrarian read. Revenue growth across the company is 23.4% year over year, EPS growth is 71.7%, and management is still guiding to strong second-half FY26 and FY27 demand tied to datacenter and communications. A valuation reset on a crowded winner is not the same thing as a fundamental break, and right now the numbers still point to reset, not rupture.
That leaves COHR looking more like a stock to respect on weakness than one to abandon on panic. We would treat this as a high-expectations name, not a broken one: the setup works as long as Datacenter & Communications demand keeps compounding and gross margin keeps holding near the high-30% range. The next real test is the August 13 earnings report, because another quarter of double-digit growth and stable-to-rising margins would make this selloff look even more like an overcrowding flush.
What would change our mind is straightforward. If revenue stays strong but margin progress stalls, or if datacenter growth starts decelerating sharply, then the valuation becomes much harder to defend. Until that happens, Coherent still looks like an AI infrastructure winner going through the kind of violent de-risking that happens after an 80%-plus year-to-date run, not the kind of collapse that usually follows a broken story.
