Summary: Wednesday data dump in Washington will gauge state of U.S. joblessness and consumer spending, along with bargain-shopping melee of Black Friday lasting through weekend. Big Five Canadian banks begin reporting what are expected to be strong results. Widespread talk, from U.N. to EU to Australia, about global warming in lead-up to Copenhagen climate-change summit in December. In a U.S. Thanksgiving-shortened week, stock prices are bound to be volatile. In sports, Vanier and Grey Cup championships decided this weekend.