Lumentum is trading at $833.64, down -4.24%, after continued profit-taking and sympathy selling across AI-linked optical stocks.
- On September 3, 2026, broader indices are higher, limiting a market-wide explanation
- Recent sector pressure followed Applied Optoelectronics’ substantial equity offering, raising dilution concerns across the photonics complex
- No comparable corporate action occurred at Lumentum; AI-optics sector selling remains the clearest identified catalyst