Conversely, if you really do expect zombies to start roaming the streets the minute that the US misses a payment on its Treasury obligations, you’re likely to be disappointed. Yes, the stock market would fall. But the price of Treasury bonds would remain in the general vicinity of par, and it might even go up if Treasury announced that past-due interest would be paid on all debt at a statutory rate of 8% per annum. Even when it’s Treasury bonds themselves which are the instruments in default, Treasury bonds remain the world’s flight-to-quality trade, and the expected recovery on all defaulted Treasury obligations would be 100 cents on the dollar — or more.
The harm done to the global financial system by a Treasury debt default would not be caused by cash losses to bond investors. If you needed that interest payment, you could always just sell your Treasury bill instead, for an amount extremely close to the total principal and interest due. Rather, the harm done would be a function of the way in which the Treasury market is the risk-free vaseline which greases the entire financial system. If Treasury payments can’t be trusted entirely, then not only do all risk instruments need to be repriced, but so does the most basic counterparty risk of all. The US government, in one form or another, is a counterparty to every single financial player in the world. Its payments have to be certain, or else the whole house of cards risks collapsing — starting with the multi-trillion-dollar interest-rate derivatives market, and moving rapidly from there.
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