Piper Jaffray analyst Christopher Raymond called Sanofi SA’s takeover of Bioverativ Inc. for $11.6 billion “just what the doctor ordered” and a positive signal for the sector overall. Paris-based Sanofi disclosed early Monday that it will acquire Bioverativ by way of a tender offer expected next month for the Waltham, Mass.-based company’s outstanding shares (NASDAQ:BIVV) at $105 each – a 64 percent premium to Friday’s closing price of $62.75.