1. A computerized trading system for trading financial instruments between traders at a plurality of trading floors, the system comprising: a plurality of trading floors; a centralized quote distribution system which determines which pairs of trading floors are credit bearing counter-parties which extend bilateral credit to one another, the centralized quote distribution system also sending dealable price quotation messages to the trading floors, each trading floor being sent dealable price quotation messages which have been prescreened for credit and represent bids and/or offers that originate from one or more credit bearing counter-parties of that trading floor; at least some of the trading floors having at least one maker screen and at least one taker screen associated therewith: (a) the maker screen permitting a trader to send maker price quotation messages to the centralized quote distribution system, the maker price quotation message indicating a bid price at which the trader is willing to sell financial instruments and/or an offer price at which the trader is willing to buy financial instruments; and (b) the taker screen permitting a trader to view and accept dealable bids and/or offers indicated by the dealable price quotation messages received from the centralized quote distribution system.