shares of novavax inc nvax slid 310 to 1155 tuesday on what proved to be an allaround mixed trading session for the stock market with the dow jones industrial average djia rising 031 to 3373396 and the nasdaq composite index comp falling 027 to 1133427 novavax inc closed 8984 short of its 52week high 10139 which the company reached on february 7th the stock underperformed when compared to some of its competitors tuesday as johnson  johnson jnj remained unchanged pfizer inc pfe fell 060 to