A US debt ceiling breach would severely damage the global financial system, leading to frozen credit markets, a falling dollar, soaring interest rates, a deep recession, and a global financial crisis.
"A debt sealing breach, however, would be a default on financial obligations the US has already made. This would shatter trust in the foundation of the global financial system, likely causing credit markets to freeze, the value of the dollar to plummet, and US interest rates to skyrocket. That is a recipe for a severe recession and a global financial crisis."