📝 Executive Summary
Dyne Therapeutics shares dropped 31% to $16.76 in premarket trading, significantly underperforming broader U.S. indices. The decline occurred without an official company announcement or clear catalyst, as major benchmarks like the Dow Jones and S&P 500 saw only modest losses. The company continues to advance its clinical-stage pipeline for neuromuscular diseases, including Duchenne muscular dystrophy.