shares of ao smith corp aos were unchanged thursday on what proved to be an allaround dismal trading session for the stock market with the sp 500 index spx falling 148 to 439366 and dow jones industrial average djia falling 105 to 3479276 ao smith corp closed 2044 below its 52week high 8674 which the company achieved on december 30th the stock demonstrated a mixed performance when compared to some of its competitors thursday as lennox international inc lii rose 060 to 25228 and bwx technologies inc bwxt fell 214 to 5545 trading volume 770389 remained 281939 below its 50day average volume of 11 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