Equity index manager MSCI will let Strategy and other digital asset treasury firms stay in its global indices for now, but it announced a new rule that could make it harder for them to buy bitcoin and other cryptocurrencies. MSCI said it won't count new shares issued by Strategy and other digital asset treasury firms, keeping their index weightings from growing as they issue more shares to buy bitcoin. MSTR stock jumped after the MSCI news, but the bitcoin price has undercut its pre-announcement level.