 Shares of Cano Health Inc. CANO, 14.83 , which provides primary care to seniors, soared 17.6 in trading on Monday, while shares of Oak Street Health Inc. OSH, 4.59 , another medical provider for people covered by Medicare, jumped 3.5. Amazon Inc. AMZN, -3.26 , CVS Health Corp. CVS, -1.51 , and UnitedHealth Group UNH, -0.31 are reportedly in a bidding war to buy Signify Health Inc. SGFY, 36.84 , a home-health provider, according to a report in The Wall Street Journal. 