Is the dollar’s rally in 2005 history? It’s more than a little easy to suspect as much in August. After rallying 10.5% this year through the end of July, the U.S. Dollar Index has reversed course thus far in August, falling 2.7% through this morning’s trading. The recent fall from grace raises new questions about the greenback, which previously suffered a three-year bear market through the end of 2004. But the bulls were heartened by the dollar’s rebound this year, recently bolstered by recent economic news that showed the American economic expansion alive and well. What happened?