Just speculation on my part, but based on what we know about this regime, I think it is quite possible that in the event of an Obama/Biden win (and especially if there is a landslide), look for the Bush Admin to trash both equity and fixed income markets.
This admin which has already nationalized Fannie Mae, Freddie Mac, AIG will have equity in several additional financial institutions.
Coordinated selling of equities, fails on bond trades, repudiation of derivative contracts through these nationalized entities are just some of the techniques the adminstration can use to wreak havoc in markets.
True, the FED will be there to stop some actions. But the current leadership of the FED is either not intelligent or Bush sycophants.
Alas, our only saviours might be overseas. Foreign central banks (who own gazillions in Treasury instruments) would look askance at any financial malfeasance by the outgoing U. S. administration.
Not to be alarmist, but stranger things have happened.