For more Forex news & info, please visit http://ufx.co/UFXM-youtube... The US Dollar strengthened versus most major currencies as risk aversion grew following Moody's downgrade of Italy, Spain and Portugal, and are now threatening to strip France, the U.K. and Austria of their top Aaa ratings. As a result the U.S. dollar, the world's main reserve currency, rose versus most major peers as investors sought safety. The Dow rose by 0.03% and the NASDAQ gained by 0.02%. Crude oil rose by 0.10% on concern that tensions with Iran may hinder Middle East exports and closed at $100.90 a barrel. Gold (XAU) fell by 0.10%, to close at $1718.00 an ounce.