...+ In the past few years, Bank of Montreal (BMO) has demonstrated good risk management with historically low loan losses and increased diversity in revenue streams and loan exposures, and has followed a conservative organic growth strategy. + We are revising our stand-alone credit profile (SACP) on BMO to 'a' from 'a-', to reflect improvements in its risk position. We are also revising our SACP on BMO Financial Corp. (BFC) to '###+' from '###', to reflect the substantial improvement in non-accruals and modest credit loss experience over the past several years. + Given the improved stand-alone creditworthiness, we are raising our issue-level ratings on BMO's non-viability contingent capital (NVCC) and non-NVCC subordinated and hybrid securities. We are affirming our 'A+/A-1' long- and short-term issuer credit ratings on BMO and its operating subsidiaries, including BFC. + The stable outlook on BMO and its operating subsidiaries reflects our expectations that the bank's financial performance...