By Laura Mandaro
SAN FRANCISCO (MarketWatch) -- The dollar turned higher against the euro Tuesday as U.S. stock markets opened higher on earnings optimism and analysts focused on stresses overhanging Europe's shared currency. One euro (EURUSD 1.2921, -0.0027, -0.2085%) bought $1.2918, down from a session high of $1.299 and $1.2951 late Monday. The dollar index (DXY 81.09, +0.21, +0.26%) turned up to 81.128 from a low of 80.737 and 80.87 late Monday. The euro had spiked earlier on Japan's pledge to buy debt issued by the European Financial Stability Facility. "Fears surrounding the sovereign debt crisis continue to bear down on market sentiment, said David Song, currency strategist at DailyFX, in emailed comments.
