That's very true - if it was my exchange, I'd pull half the cash and invest in TBills or a money market fund 
And then the day you do that your bills that offer MAX return of like 5% p.a. get downgraded, and you lose 30-50% on your initial investment. Tbills is propably the worst kind of investment unless you invest just after a downgrade (and even then its still just a few %, better just use a normal savings account).