World stocks waver on last trading day of 2011 Associated Press Copyright 2011 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed. Updated 02:15 a.m., Friday, December 30, 2011 BANGKOK (AP) — Global stock markets were mixed Friday on 2011's last trading day and turned in heavy losses for the year after Europe's debt crisis and natural disasters battered a struggling global economy. Analysts said global stocks tumbled in lockstep, suffering from the effects of natural disasters, a wobbly recovery in the U.S.