Rede Polo, a retailer based in the state of Rio Grande do Sul, Brazil is reportedly acquiring 57 stores from Spanish supermarket chain Dia. According to sources, Dia recently ceased operations in the state of Rio Grande do Sul, where it had 70 outlets. Four of the stores to be acquired are located in the state capital Porto Alegre. Rede Polo, which has operated stores in Rio Grande Do Sul since 1998 under the banner …