08:57 AM EDT, 10/07/2025 (MT Newswires) -- Health care stocks were declining pre-bell Tuesday, with the Health Care Select Sector SPDR Fund (XLV) 0.2% lower and the iShares Biotechnology ETF (IBB) down 0.1%.

Dyne Therapeutics Inc ( DYN ) shares were up more than 4% after the company said additional one-year data from its ongoing phase 1/2 trial of zeleciment basivarsen, or z-basivarsen, in patients with myotonic dystrophy type 1 demonstrated "clinically meaningful improvements" in strength and function using the selected registrational dose.