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SAO PAULO, Jan 28 (Reuters) - Brazil's Fibria Celulose SA, , the world's largest producer of eucalyptus pulp, posted a fourth-quarter net loss on Wednesday as a currency swing boosted operations but pushed up debt-servicing costs, according to a securities filing.
Fibria's net loss of 128 million reais ($49.7 million) was 31 percent smaller than a year earlier, beating an average forecast of a 185 million reais loss in a Reuters poll of four analysts.
Brazil's currency, the real, weakened nearly 9 percent in the fourth quarter, boosting revenue from Fibria's exports but also driving up the cost in reais of its dollar-denominated debts.
Rising pulp prices and lower production costs also helped the company lift its operating profit.
Adjusted earnings before interest, taxes, depreciation and amortization, rose 10 percent from a year earlier to 906 million reais. ($1 = 2.5757 Brazilian reais) (Reporting by Alonso Soto and Priscila Jordao)