Patent ID: 7912780

Claim:
A computer-implemented method for matching a buy order having a buy order price and a sell order having a sell order price with a system comprising one or more computer processors, said method comprising the steps of: identifying with one of said computer processors a national best bid and offer (NBBO) price range, said NBBO price range having a best offer price and a best bid price; determining with one of said computer processors if said buy order price and said sell order price are within said NBBO price range; determining with one of said computer processors if said buy order price is not less than said sell order price; calculating with one of said computer processors a midpoint between said buy order price and said sell order price; and only matching with one of said computer processors said buy order and said sell order at said midpoint if said buy order price is not less than said sell order price and said buy order price and said sell order price are within said NBBO price range.