The present invention relates to a credit index, a system and method for structuring a credit index, a system and method for operating a credit index, and a system and method for determining the liquidity of a credit....http://www.google.com.tw/patents/US20100268635?utm_source=gb-gplus-share專利 US20100268635 - CREDIT INDEX, A SYSTEM AND METHOD FOR STRUCTURING A CREDIT INDEX, AND A SYSTEM AND METHOD FOR OPERATING A CREDIT INDEX