Economy

Lackluster results of Spanish debt auction also hit Italian, Greek bonds.

Recent comments reflect a new focus on domestic demand.

U.S. may take back role as main engine for global growth as China, Europe decelerate.

More than two-thirds of U.S. state economies strengthened in Q4.

Philly Fed chairman sees economy doing better without additional stimulus.

Bernankes new QE approach suggests the Fed sees improvement.