COHH is trading at $6.63 (-3.07%) as semiconductor weakness extends the selloff that sharply reduced risk appetite on August 18, 2026.

  • Philadelphia Semiconductor Index fell 5%, while higher Treasury yields pressured richly valued growth and AI-related stocks.
  • Renewed U.S.-Iran tensions, oil above $90 and the 30-year Treasury yield near 5.33% kept inflation and borrowing-cost concerns elevated.
  • COHH targets 200% of Coherent’s daily move, amplifying the sector weakness.