COHH is trading at $3.73, down 6.86%, as continued selling in AI-optics and networking stocks appears to weigh on Coherent. - No verified company-specific negative catalyst; sector coverage cites risk-off trading, valuation pressure, and AI spending and financing concerns. - Hot September inflation renewed higher-for-longer rate worries, which can pressure capital-intensive AI infrastructure and growth stocks. With broader markets mixed, sector weakness appears more relevant. - As a 2x long ETF, COHH amplifies Coherent moves; no volume figure was provided.