shares of howmet aerospace inc hwm slipped 382 to 4206 thursday on what proved to be an allaround poor trading session for the stock market with the sp 500 index spx falling 185 to 391832 and dow jones industrial average djia falling 166 to 3225486 howmet aerospace inc closed 231 short of its 52week high 4437 which the company reached on february 28th the stock underperformed when compared to some of its competitors thursday as berkshire hathaway inc cl a brka fell 232 to 46103000 berkshire hathaway inc cl b brkb fell 210 to 30482 and transdigm group inc tdg fell 300 to 74155 trading volume 51 m eclipsed its 50day average volume of 26 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