Dollar's 5-week high rally cools down as lira weakens.

The US dollar fell slightly from a five-week high on Monday, while the Turkish lira sank to a two-month low as weekend elections looked headed for a runoff. The Thai baht rallied after a more decisive election result. Analysts have said many factors could be behind the dollar's recent strength, including concerns about US inflation, and fears about the debt ceiling standoff and global economic growth driving safe-haven buying.