Core Insights - The microcap biotech stock experienced its best trading day ever following the FDA's grant of a breakthrough designation for its rare-disease drug [1] Company Summary - The company specializes in developing treatments for rare diseases and has received significant recognition from the FDA, which may enhance its market position and investor interest [1] Industry Summary - The biotech industry, particularly in the microcap segment, can see substantial stock price movements based on regulatory approvals and designations, highlighting the volatility and potential for high returns in this sector [1]