...In our view, Caixa Economica Federal continues to be a key government-related entity (GRE) for the sovereign because of its importance in Brazil's mortgage lending industry and its social role. Therefore, our ratings on the bank are the same as those on the sovereign. Moreover, we think the bank played a key role during the coronavirus pandemic in Brazil. Since April 2020, Caixa has been helping the government deal with the economic fallout and social effects through several countercyclical actions and by acting as the government's payment provider to support families. As a result, we believe Caixa continues to play a critical role for the government--and for the government's economic strategy--as one of the most important GREs in the country....