DocuSign's (DOCU) possible sale to a private equity firm could be a precursor to more deals but perhaps not at big premiums, said an Evercore ISI analyst. DOCU stock rose for a second day in a row amid reports it could be acquired.X PE firms Bain Capital and Hellman & Friedman are both kicking the tires at DocuSign, a maker of electronic signature software, according to reports."We will see where this goes but we expect to see many more P/E deals in software over the next 18 to 24 months if the macro backdr ...