shares of paccar inc pcar dropped 053 to 9979 monday on what proved to be an allaround grim trading session for the stock market with the sp 500 index spx falling 008 to 389209 and dow jones industrial average djia falling 034 to 3351765 paccar inc closed 739 short of its 52week high 10718 which the company achieved on november 23rd trading volume 18 m remained 328574 below its 50day average volume of 21 m 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