Krystal Biotech is trading at $320.96, down -4.15%, with biotech-sector weakness the clearest available explanation.

  • No October 6 company-specific announcement appears on Krystal Biotech’s investor-relations news page; its latest listed release is dated September 3.
  • The biotech ETF was down 2.50%, amid reported broad negative sentiment and risk aversion. Major market indexes were higher, making the move appear sector-specific rather than a broad-market selloff.
  • No volume data was provided.