 Opko Health Inc. NASDAQ:OPK shares saw unusually-strong trading volume on Monday . Approximately 21,513,410 shares changed hands during trading, an increase of 23 from the previous sessions volume of 17,529,406 shares.The stock last traded at 1.82 and had previously closed at 1.90. Several equities analysts recently commented on OPK shares. Piper Sandler upped their target ... 