the dow jones industrial average is trading down friday afternoon with shares of merck and walmart delivering the stiffest headwinds for the priceweighted average the dow djia was most recently trading 91 points 03 lower as shares of merck mrk and walmart wmt are contributing to the bluechip gauges intraday decline mercks shares have dropped 267 24 while those of walmart are down 324 or 21 combining for an approximately 39point drag on the dow other components contributing significantly to the decline include procter  gamble pg  amgen amgn  and unitedhealth unh  a 1 move in any of the indexs 30 components results in a 659point swing 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