By Marcela Ayres BRASILIA, Feb 10 (Reuters) - A Canadian research note calling ex-president Luiz Inacio Lula da Silva a possible "savior" of Brazil's sluggish economy has stoked debate in financial markets over increasingly bullish foreign investors eyeing a return of the left-wing leader. BCA Research analysts raised their recommendation on Brazilian equities and sovereign debt to "overweight" in a note...
