【早间财经】Feb 12th

U.S. stocks extended their four-day winning streak and ended Tuesday with solid gains as Federal Reserve Chairwoman Janet Yellen pledged to keep interest rates low. The S&P 500 closed up 1.1%, making its best four day gain since 2011. The Dow Jones Industrial Average closed up 1.2%. The index's 3.6% gain over the past four days is its best four consecutive up days since 2012. The Nasdaq ended the day 1%, higher. The tech-heavy index turned positive for 2014 and is now up 0.3% so far this year. On Thursday, Janet Yellen will testify before the Senate Banking Committee. In other markets, Canada's S&P/TSX was up 0.7 percent European stocks rose for a fifth-straight day, Germany's DAX 30 rallied 2 percent France's CAC 40 rose 1.1 percent and the U.K.'s FTSE 100 gained 1.2 percent. Gold pushed a win streak toward a fifth session, while oil rose and the dollar fell against the British pound and Australian dollar.