My guess is that equity holders will be wiped out and bondholders will be made whole. Why? Because so much of the debt is owned by foreign governments and it was bought on the understanding that it had the implicit backing of the US government. The US would have some very pissed off foreign governments to contend with if they wiped out bond holders.
If you look at the losses coming down the pike the equity is already worthless. That means the current share price is simpy a call option on the future.
I think the Treasury will step in and issue some kind of preference shares with their dutiful citizens money and nationalize these farcical instituitions once and for all.
According to the spreads, anything other than the most senior bond holders are looking at at least a haircut.
I hear Pimco made a big bet on agency bonds. When all there is to catch is falling knives, even the best get hurt.