Why the greenback is on a tear

I was caught by surprise myself at the strength of the dollar, but as the article later alludes, the dollar's prospects long-term are another story...

In a twist few predicted, the rush away from risky assets has actually been good for the dollar - even though the U.S. needs to borrow $2 billion a day from its creditors overseas just to keep the lights on, and has been adding to its already substantial obligations at a rapid clip.