(Updates with fresh details, comment and closing figures) * Canadian dollar at C$1.2693 or 78.78 U.S. cents * Bond prices mostly higher across the maturity curve By Solarina Ho TORONTO, March 30 (Reuters) - The Canadian dollar extended losses against a rebounding greenback on Monday, as oil prices fell and as investors looked ahead to domestic data later this week. Investors are bracing for weak economic growth numbers in January for Canada due on Tuesday as well as weak trade figures for February due on Thursday. Markets will also be taking note of U.S. employment data on Friday. In a Financial Times interview published on Monday, Bank of Canada governor Stephen Poloz said the first quarter of 2015 will look "atrocious" because of the oil shock, which saw prices plunge more than 50 percent since last summer. Canada is a major exporter of crude. "With Canada in particular, the market's just a little bit more nervous with oil pricing as well," said Amo Sahota, director at Klarity FX in San Francisco. "(But) the market is going to be more focused on data-dependent information, so the GDP will be important for that. Poloz's comments have really set the tone already." The Canadian dollar finished the session at C$1.2693 to the U.S. dollar, or 78.78 U.S. cents, weaker than Friday's close of C$1.26, or 79.37 U.S. cents. The U.S. dollar gained against a basket of currencies on the view that the Federal Reserve will hike U.S. interest rates this year following comments late on Friday from Fed Chair Janet Yellen. Sahota said the underlying trend of U.S. dollar strength remained a constant presence. The price of crude slipped as six world powers discussed a possible deal with Iran over its nuclear program. A deal could bring an end to sanctions and see an increase in Iranian oil exports that would add to an already well-supplied oil market. Earlier in the session, U.S. data showed consumer spending rose negligibly in February, the latest sign that the U.S. economy has been experiencing a soft first quarter. Meanwhile, inflation edged higher, but was still below target. "We still expect it to be a bit on the soft side through the first half of this year," said Mazen Issa, macro strategist at TD Securities. "Once we get that break higher ... that will give the Fed more confidence to begin lifting the policy rate." Canadian government bond prices were mostly higher across the maturity curve, with the two-year up 2.5 Canadian cents to yield 0.509 percent. The benchmark 10-year was flat, however, yielding 1.376 percent. (Editing by Meredith Mazzilli and Diane Craft)