Moderna is trading 5.5% down at $164.77, apparently due to profit-taking after its exceptional regular-session rally.

  • It closed at $174.38 on August 19, 2026, following a 176.97% regular-session surge.
  • The rally followed positive Phase 3 INTerpath-001 melanoma results for Moderna’s intismeran with Merck’s Keytruda, improving recurrence-free and distant-metastasis-free survival.
  • No reliable late-breaking negative announcement specifically explains the after-hours decline.