A better question along the same lines is why did all global commodities soar and stay up there?
I believe it is the Obama risk factor.
Everyone has discounted and moving to their expectations of a lousy presidency.
And what progressives generally, and democrats specifically are unequiped to grasp, is that the (now justified) stampede for the financial exits began in 2007, before "the great uniter" was elected.
For them, it was "Bush's fault."