Trading Bureaux
Just wondering (please, I do not mean to be at all cynical), all these bureaus seem to be run by Ex-Liffe locals and they are no doubt responsible for a huge volume of trades on the exchanges at present. Also, their trading often mostly follows the same patterns as they use similiar strategies(scalping, spreads etc).
Floor 'local' or 'ex-local' usually means a licence to print uknowot and since trading is a zero sum game, who are they all 'skimming money' off to earn their regular profits?