TD, Canada's second-largest bank by market capitalization, had its pristine top-level Aaa rating dropped to Aa1, while Bank of Nova Scotia and Desjardins were dropped from Aa1 to Aa2. BMO, CIBC, and National Bank of Canada were dropped from Aa2 to Aa3. The outlook for all six banks remains stable, and their short-term credit ratings were re-affirmed.