shares of sirius xm holdings inc siri slid 197 to 398 wednesday on what proved to be an allaround grim trading session for the stock market with the nasdaq composite index comp falling 085 to 1192934 and dow jones industrial average djia falling 011 to 3364650 this was the stocks second consecutive day of losses sirius xm holdings inc closed 287 below its 52week high 685 which the company reached on august 11th the stock underperformed when compared to some of its competitors wednesday as alphabet