Here's what could happen in markets if the U.S. defaults. Hint: It won't be pretty

A U.S. debt default would lead to a slump in stock and bond markets, while eroding the U.S.' financial standing in the world, analysts say. (Michael M. Santiago/Getty Images)

The deadlines! The arm-twisting! The threat of default!

The U.S. may be just days away from being unable to pay its bills, but Wall Street has seen this movie before, and markets seems unbothered — for now.