shares of dexcom inc dxcm rallied 265 to 54039 tuesday on what proved to be an allaround favorable trading session for the stock market with the sp 500 index spx rising 105 to 434572 and the dow jones industrial average djia rising 092 to 3431467 dexcom inc closed 3861 short of its 52week high 57900 which the company reached on september 23rd the stock outperformed some of its competitors tuesday as johnson  johnson jnj rose 023 to 15958 abbott laboratories abt rose 030 to 11588 and medtronic plc mdt rose 060 to 12580 trading volume 587268 eclipsed its 50day average volume of 580994 editors note this story was autogenerated by automated insights an automation technology provider using data from dow jones and factset see our market data terms of use