US default fear prompts HKEx risk measures

Girding itself for the doomsday scenario of the United States defaulting on its debt obligations, Hong Kong Exchanges and Clearing has increased the collateral put up by investors and brokers using short-term US treasury bills.

via Business feed http://www.scmp.com/business/money/markets-investing/article/1329006/us-default-fear-prompts-hkex-risk-measures