no it was n't black monday 
 but while the new york stock exchange did n't fall apart friday as the dow jones industrial average plunged N points most of it in the final hour it barely managed to stay this side of chaos 
 some circuit breakers installed after the october N crash failed their first test traders say unable to cool the selling panic in both stocks and futures 
 the N stock specialist firms on the big board floor the buyers and sellers of last resort who were criticized after the N crash once again could n't handle the selling pressure 
 big investment banks refused to step up to the plate to support the beleaguered floor traders by buying big blocks of stock traders say