Share your insights or perspective on the financial matter presented in the input.

How could USA defaulting on its public debt influence the stock/bond market?
This is a speculative question and there's no "correct" answer, but there are definitely some highly likely outcomes. Let's assume that the United States defaults on it's debt. It can be guaranteed that it will lose its AAA rating. Although we don't know what it will drop to, we know it WILL be AA or lower.  A triple-A rating implies that the issuer will never default, so it can offer lower rates since there is a guarantee of safety there.People will demand a higher yield for the lower perceived security, so treasury yield will go up.  The US dollar, or at least forex rates, will almost certainly fall. Since US treasuries will no longer be a safe haven, the dollar will no longer be the safe currency it once was, and so the dollar will fall. The US stock market (and international markets) will also have a strong fall because so many institutions, financial or otherwise, invest in treasuries so when treasuries tumble and the US loses triple-A, investments will be hurt and the tendency is for investors to overreact so it is almost guaranteed that the market will drop sharply. Financial stocks and companies that invest in treasuries will be hurt the most. A notable exception is nations themselves. For example, China holds over $1 trillion in treasuries and a US default will hurt their value, but the Yuan will also appreciate with respect to the dollar. Thus, other nations will benefit and be hurt from a US default. Now many people expect a double-dip recession - worse than the 08/09 crisis - if the US defaults. I count myself a member of this crowd. Nonetheless, we cannot say with certainty whether or not there will be another recession or even a depression - we can only say that a recession is a strong possibility. So basically, let's pray that Washington gets its act together and raises the ceiling, or else we're in for bad times. And lastly, a funny quote :) I could end the deficit in 5 minutes.   You just pass a law that says that   anytime there is a deficit of more   than 3% of GDP all sitting members of   congress are ineligible for   reelection.   - Warren Buffett