The dollar gained against the safe-haven yen on Wednesday, boosted by a surge in European and U.S. stocks amid a global recovery in risk appetite that also drove rallies in commodity currencies such as the Australian and Canadian dollars. The dollar was up 0.2 percent at 120.09 yen, extending gains from an overnight low of 118.885, with a spike in U.S. debt yields on reduced risk aversion helping the greenback. The Australian dollar edged up to $0.7036, adding to the 1.4 percent surge overnight which whisked it away from a 6-1/2-year low of $0.6892 struck on Monday. "Equity movements continue to impact the ... (full story)