* Biden: US and Canada to work toward zero emissions by 2050
* Fed Chairman Powell: recovering lost jobs will take years
* Fed’s easy money policy will continue until economy recovers, says Powell
* Value investing’s old rules are history, say academics
* Exports and construction boost German GDP in fourth quarter
* Mid-Atlantic manufacturing activity continues to expand in February
* US Consumer Confidence Index continues to rise in February
* US home prices increased 10.4% in Dec vs. year ago–fastest pace in 7 years: