Why Is OS Therapies ($OSTX) Stock Down -31.30% Today? Shares plunged 31.30% to $0.79 in early trading, down from a previous close of $1.15. Primary catalyst:

Why Is OS Therapies ($OSTX) Stock Down -31.30% Today? Shares plunged 31.30% to $0.79 in early trading, down from a previous close of $1.15. Primary catalyst: the company pushed back key regulatory decision timelines for its lead drug candidate, OST-HER2 (Herlystic).