Global shares slid for a sixth day while safe-haven U.S. and German government debt rose on Wednesday as rising fears about the fragility of Spanish banks and a political impasse in Greece worsened fears about the euro zone debt crisis. The concerns over Europe added to those of U.S and global economies turning softer. The turmoil put the Dow Jones industrial average on track for a sixth day of losses and nearly wiped out this year's gains for European shares. Oil prices also slid for a sixth straight session as gold touched a four-month low that all but erased its gains for 2012. The euro zone debt crisis prompted ... (full story)