fell 335. and wall street s enthusiasm over the tax cut deal ran wild tuesday morning, but by the afternoon, the markets had gone flat. the s&p hit a two-year mid session high as traders celebrated the tax compromise. but that rally fizzled after bond prices fell sharply. and the ten-year treasury note yield hit its highest level since june. also stressing investors, news that the securities and exchange commission issued more than a dozen subpoenas investigating wall street insider trading. volume was heavy. more than $11 billion in shares moved tuesday. many in citigroup which rose almost 4% after the government sold its last shares. 3m fell 3% after issuing a sales outlook that was lower than expected. natural gas distributor nicorp was bought by agl