A trading process for trading securities in an electronic market includes a matching process to match a portion of a received order for a security against a security interest stored in an order book. The system includes a server (10), a securities processor (12) that stores securities trade information in an order book (14) that resides in random access memory (16) and an execution log file (18) that records orders executed against the information in the order book. A central processing unit (50) processes the trades received over network (52) by executing instructions stored in an operating system (54) along with other instructions which are stored in server storage (56).
