May 10 (Reuters) - Moody's investor service on Wednesday downgraded the long-term ratings for six Canadian banks, citing a more challenging operating environment for Canadian banks for 2017 and beyond.
Moody's said the six downgraded banks are Toronto-Dominion Bank TD.TO , Bank of Montreal BMO.TO , Bank of Nova Scotia BNS.TO , Canadian Imperial Bank of Commerce CM.TO , National Bank of Canada NA.TO and Royal Bank of Canada RY.TO .
The ratings agency also downgraded ratings for the affiliates of the six banks.