Several healthcare and biotech stocks posted notable price action across both after-hours and regular trading sessions on September 29, driven by clinical trial updates, regulatory progress, and strategic announcements. Below is a roundup of key single-day performance highlights and the news behind them.Phio Pharmaceuticals Corp. (PHIO) surged 8.9% in after-hours trading on September 29, rising from its regular session close of $2.36 to$2.57, following a 5.83% gain earlier in the day. The move comes after ...