Commodity surge boosts world equities; dollar falls

By Caroline Valetkevitch NEW YORK (Reuters) - Major world stock markets were poised for their biggest weekly advance since 2011 on Friday, as greater investor appetite for riskier assets propelled gains in equities and a surge in commodities and crude oil prices. Declines in the dollar, a bullish oil forecast and giant miner Glencore's pledge Friday to slash world zinc output by 4 percent have lifted beaten-down commodities, with Brent crude oil headed for its biggest weekly rise since March 200