Asset manager Brookfield BAM.TO is seeking to buy the 50% stake in Spain's renewable power company X-elio it does not already own, Spanish newspaper Expansion reported. Feb 15 (Reuters) - Futures for Canada's resource-heavy main stock index fell on Wednesday as commodity prices declined, while investors worried about the probability of further monetary tightening by central banks. O/RGOL/ The Toronto Stock Exchange's S&P/TSX composite index .GSPTSE ended flat on Tuesday as mixed U.S. inflation data stoked worries that price pressures are not cooling as fast as central banks would wish.