In terms of the financial indicators that are released by Statistics Canada, I think that their debt service ratios as well as their debt-to-income ratios and their leverage ratios, their debt-to-asset ratios, that they publish are a good place to start. As well, I think documents and reports such as the bank's “Financial System Review” is essential reading. Again, they are providing a much deeper dive into the finer details.
The other indicators that are often looked at are mortgage delinquencies or loan delinquencies as well at a higher frequency. If you start to see those trend up, that is an early warning sign, too.