Banks provide what amounts to a necessity in the finance sector, and these two Canadian giants have utility-like properties.The average large U.S. bank stock has a dividend yield of 2.3%. You can do way better than that if you buy Canadian banking giants Toronto-Dominion Bank (TD 0.79%) or Bank of Nova Scotia (BNS -0.74%), which have yields of 3.9% and 4.9%, respectively.But higher dividend yields are only the start of the story. Here's why TD Bank and Scotiabank, as the banks are more commonly known, are t ...