How could USA defaulting on its public debt influence the stock/bond market?
Regarding the Summer of 2011 Crisis: There is NO reason that the United States cannot continue borrowing like it is just based on a particular ratio:  Debt to GDP. The Debt to GDP ratio right now is around 100%, or 1:1. This means the US GDP is around $14 Trillion and its debt is also around $14 trillion.  Other countries have higher debt:gdp ratios Japan - for instance - has a debt:gdp ratio of 220% Regarding a selloff of stocks, dollars and bonds: you have to realize that selling pressure on the dollar will make THE PRICE OF EVERYTHING increase. So commodities and stocks will skyrocket proportionally. The stockmarket can selloff faster than the dollar though. And both markets have circuit breakers that can attempt to curb quick selloffs. Effectiveness pending.