shares of paccar inc pcar slipped 072 to 7159 thursday on what proved to be an allaround positive trading session for the stock market with the sp 500 index spx rising 133 to 414622 and the dow jones industrial average djia rising 114 to 3402969 the stocks fall snapped a fourday winning streak paccar inc closed 513 below its 52week high 7672 which the company reached on march 7th trading volume 25 m remained 542714 below its 50day average volume of 30 m