Commentary Topic from greenfaucet
It hasn't held true in the long run, but over the last 6 months the dollar's rally has had a strong inverse correlation to the direction of the stock market.
It makes sense in this environment because a nation's currency is a barometer which represents many things, including a nation's political stability. While the theory of decoupling has been shredded and the world's economies have jumped the track in unison, our currency has become like the old saying about capitalism: it's the worst except for all the rest.