Shares of UnitedHealth and Merck are buying and selling decrease Wednesday afternoon, sending the Dow Jones Industrial Common into destructive territory. The Dow DJIA was most not too long ago buying and selling 63 factors (0.2%) decrease, as shares of UnitedHealth UNH and Merck MRK are contributing to the blue-chip gauge’s intraday decline. UnitedHealth’s shares are off $16.10, or 3.0%, whereas these of Merck are down $2.27 (2.5%), combining for an roughly 121-point drag on the Dow. Additionally contributing considerably to the decline are Procter & Gamble PG, IBM…