shares of northern trust corp ntrs shed 267 to 8824 wednesday on what proved to be an allaround grim trading session for the stock market with the sp 500 index spx falling 061 to 399532 and dow jones industrial average djia falling 042 to 3396635 the stocks fall snapped a threeday winning streak northern trust corp closed 4691 short of its 52week high 13515 which the company reached on january 13th the stock underperformed when compared to some of its competitors wednesday as morgan stanley