DaVita Slides as JPMorgan Sees Bigger Risks -- Market TalkBY Dow Jones & Company, Inc.— 12:35 PM ET 10/09/201712:35 ET - DaVita (DVA) is the biggest loser in the S&P 500 after JPMorgan cuts its shares to underweight from neutral on continued concern about the amount of profits it makes in connection with the American Kidney Fund which provides assistance paying insurance premiums of needy patients. JPMorgan advises caution without more clarity about the ongoing legal battle between insurance companies, dialysis providers and the American Kidney Fund. Davita (DVA) is off 8% today and 15% YTD, while smaller dialysis services provider American Renal Associates (ARA) is off 33% YTD on worries about a possible Justice Department investigation. (patrick.sheridan@wsj.com)