Why Is COHERENT CORP (COHR) Stock Down Today?

COHR stock fell 7.82% to $266.87 in Monday trading, pressured by a broader selloff in the AI optics and semiconductor sectors. The decline followed a surprise $600 million equity offering by Applied Optoelectronics, which triggered a broad pullback in high-growth optical and chip stocks. COHR’s sharp drop was also amplified by a -4.5% opening gap and a weak intraday performance that pushed the stock closer to its 52-week low.

What Happened

The stock opened at $276.35, down from the prior close of $289.52, and quickly moved lower throughout the session. COHR reached a high of $276.62 at 7:40 AM ET before declining to a low of $263.40 at 9:45 AM ET. The selloff was part of a broader market shift as bond yields rose and investors rotated out of high-beta growth names. The optics sector, which includes COHR, was particularly vulnerable after Applied Optoelectronics announced its capital raise, triggering a chain reaction across the AI infrastructure space. COHR’s stock has been volatile in recent months, with a 52-week range from $85.52 to $440.00.

What The Data Shows

COHR traded at a volume of 1.1 million shares, which is 0.2 times its 3-month daily average, suggesting limited participation in the move. The stock has a beta of 2.11, indicating it is highly sensitive to market swings. Recent insider activity shows two sales by COHR’s CFO totaling $1.3 million in the last 90 days. On the congressional side, Rep. Ro Khanna sold and bought small positions in COHR within the last month. Meanwhile, the 52-week tape showed COHR printing seven fresh 52-week lows on August 24, highlighting the stock’s recent bearish trend.

What To Watch

COHR does not have an upcoming earnings date listed. Investors should monitor coverage breadth and the broader market reaction to AI infrastructure stocks, as well as any follow-through selling pressure in the sector.