(Bloomberg) -- CVS Health Corp. shares tumbled the most in nine years after the company cut its annual earnings outlook for the second quarter in a row, citing increased medical costs in its Medicare insurance business.Most Read from BloombergTesla Axes Supercharger Team in Blow to Broader EV MarketNYPD Arrests Over 300 Protesters in Crackdown on College CampusesFed to Signal Delay of Interest-Rate CutsLilly Soars as Forecast Boost Shows Weight-Loss Drugs’ PowerAmazon Posts Biggest Cloud Sales... Read this story