COHH is trading 3.84% down today as Treasury yields pressure growth stocks.
- 30-year Treasury yield hit 5.217%; 10-year yield rose to 4.67%, reversing prior-session relief after expanded Treasury bond buybacks.
- COHH targets 200% of Coherent’s daily performance; COHR weakness is magnified, while sharp declines and limited liquidity amplify volatility. COHR fell nearly 2% Thursday open despite earnings-related price-target increases.
- U.S. indexes fell in the August 20, 2026 morning session, confirming a wider risk-off backdrop, not an isolated ETF event.