Wall Street extended Monday's gains in early trading Tuesday, as Australia unexpectedly increased interest rates. The Reserve Bank of Australia decided to boost the overnight cash rate target to 3.25 percent from 3 percent, which is the first Group of 20 nation to do so, showing fresh signs the global economy is recovering. Commodities rallied as Australia hikes interest rates. And commodity stocks led the big board higher. The Dow Jones rose 66.50 to 9,666.25. Broader indexes also went higher. The Standard & Poor's 500 index added 7.64 to 1,048.10 and the Nasdaq climbed 13.77 to 2,081.92. 