What Just Happened To Coherent Stock?
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Coherent (COHR) stock rose 16.8% on Monday, November 9, 2026, while the S&P 500 gained 2.3%. Coherent made no SEC filing on Friday or Monday and last reported results on its November 4 call. The move came as Wall Street rebounded from a steep sell-off in global technology stocks the week before. What does Coherent’s business have to do with a rebound in technology stocks?
Coherent Sells Mostly Into Data Center And Communications
Coherent generated 82% of its revenue from the data center and communications segment in fiscal Q1 2027, the quarter that ended September 30, 2026. On the November 4, 2026 call, management said the continued AI build-out across those businesses drove the quarter’s revenue. Within communications, the largest source of revenue is now scale-across, products that link distributed AI data centers.
Coherent’s shares had already swung hard in the days before Monday. They fell 13.0% on November 5, a second straight day of selling in AI optical stocks, and then rose 13.6% on November 6. The November 5 fall came in the session after Coherent’s earnings call. On Monday the broader market recovered: the S&P 500 erased the losses it had taken after the midterm elections, and the Nasdaq Composite rose 2.7%.
Five Peers Rose Too, But Less Than Coherent
All five companies on the Trefis peer list for Coherent rose in the same session. Lumentum gained 10.7% and IPG Photonics 8.2%, with MKS, Corning and Broadcom in between. The technology sector fund, XLK, rose 3.7%, against 2.3% for the S&P 500. Coherent moved with its group, but its gain was larger than that of every peer on the list.
Where Coherent Stock Stands After Monday’s Rise
A one-day rise of this size is rare for Coherent. Over the prior year, the stock rose this much or more in only one session, posting a 17.6% gain on June 2, 2026. On that day, the stock set its highest close of the past year at $426.89.
The shares have fallen a long way since then. Coherent lost 28.0% over the month to November 9, while the S&P 500 lost 3.3%, and the stock is down 40.7% over six months. Over the full twelve months, it is still up 41.4%, against 13.7% for the S&P 500. Monday’s close also sits well above the year’s lowest close of $135.61, set on November 20, 2025. Monday’s close was $225.19.
At Monday’s close, Coherent traded at 5.6 times its sales over the last twelve months, against 3.1 times for the S&P 500. Coherent is expected to report its fiscal second-quarter 2027 results in February 2027, and revenue, which management guided to $2.55 billion to $2.75 billion, is the figure to watch. Coherent reported revenue of $2.37 billion for fiscal Q1 2027.
Beyond COHR: A Systematic Way To Invest
Before you decide on COHR, consider a better choice. Since its September 2020 launch, the Trefis High Quality (HQ) Portfolio has returned 105%, ahead of a benchmark that combines the S&P 500, S&P MidCap and Russell 2000, without betting on one stock.
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