Voyager Therapeutics is trading at $2.27, up +10.77%, amid biotech-sector strength. - Biotech rose 2.10%, less than Voyager Therapeutics’ advance. - No clear company-specific announcement explaining the October 20 move was found; the company news page lists no October 20 release. - An online result about a Novartis collaboration expansion refers to a January 2024 article, not a new October 20 catalyst.