shares of corning inc glw dropped 076 to 3373 wednesday on what proved to be an allaround rough trading session for the stock market with the sp 500 index spx falling 061 to 399532 and dow jones industrial average djia falling 042 to 3396635 the stocks fall snapped a twoday winning streak corning inc closed 974 short of its 52week high 4347 which the company reached on february 10th the stock demonstrated a mixed performance when compared to some of its competitors wednesday as thermo fisher