shares of marketaxess holdings inc mktx inched 033 higher to 29977 tuesday on what proved to be an allaround grim trading session for the stock market with the sp 500 index spx falling 046 to 411917 and dow jones industrial average djia falling 017 to 3356181 marketaxess holdings inc closed 10001 below its 52week high 39978 which the company achieved on april 4th