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 the S&P rating agency downgrading of a number of national ratings. Wall Street closed positive as Germany and the European Commission welcomed Greek approval of the austerity steps demanded for a financial lifeline, the Dow rose by 0.57% and the NASDAQ by 0.95%. Crude oil rose by 1.90% to close at $100 a barrel. Gold (XAU) fell by 0.10%, to close at $1719 an ounce.