A money market mutual fund and a method for improving the efficiency of margining exchange-traded futures and options contracts is described. Shares of at least one mutual find are purchased by a futures commission merchant (FCM) on behalf of itself or its customer. The FCM then transfers or pledges...http://www.google.com/patents/US20020035531?utm_source=gb-gplus-sharePatent US20020035531 - Common margin settlement vehicle and method of margining exchange-traded futures contracts
