Regencell Bioscience (NASDAQ: RGC) Stock News Today: DOJ Probe, Extreme Volatility, and What Forecasts Say on Dec. 22, 2025
Regencell Bioscience shares swung from $19.07 to $24.50 by midday Monday, Dec. 22, 2025, continuing a year of sharp volatility. The company, which has never reported revenue and remains in R&D, disclosed in October it faces a DOJ investigation into trading activity and has received a subpoena.