GNCA stock at $0.00 on 19 Feb 2026: market closed, recovery signals weak

GNCA stock closed at $0.00 on 19 Feb 2026 after a one-day decline of -97.44%, making it one of the top losers on the NASDAQ market-close list. Trading volume was 30,268 shares versus a 50-day average near 80,568, reflecting thin liquidity and high directional risk. Investors should note Genocea Biosciences, Inc. (GNCA) is a U.S. biotech with Chapter 11 history and negligible market capitalization, which helps explain extreme price moves and limited analyst coverage.