Regis and St Barbara shares fall 3% and 4% despite McPhillamys and 15-Mile project updates

Regis Resources said work on an alternative tailings strategy at its McPhillamys Gold Project supports filtered tailings co-disposed within the mine waste dump, allowing the company to reinstate 1.89Moz of reserves and outline a post-tax IRR of 21.8% at a A$4,000 per ounce gold price. St Barbara said its Initial Project Description for the 15Mile Processing Hub Project has passed the conformity review stage, moving the project into the formal planning phase. Despite the updates, Regis shares fell 3% and St Barbara shares dropped 4% on the day, with gold-price weakness outweighing the company news.