<t>The collateral that you are allowed to post is "regulated" by the CSA. You tend to have cash (EUR, USD, GBP) valued at 100%. Then you have government bonds (<1y, 1y-<5y, 5y-<10y, 10y-<15y for the most part), which the ISDA standard (and most credit standards) allow you to use US Treasuries, UK Gi...