“Some argue that the “best” mortgage strategy is picking the lowest possible rate, every time. That’s a horrible plan if the mortgages you pick have prepayment and refinance restrictions that cost you more than the rate savings. But assuming you chose reasonably flexible mortgages, this strategy would have served you well the majority of the time throughout history….”

http://www.canadianmortgagetrends.com/canadian_mortgage_trends/2014/03/analyzing-bmos-go-fixed-advice.html#more