Assume that some of the experts have hidden clients

For several years I have heard, read and seen various "experts" advises borrowers to choose fixed interest rates for their mortgages. Historically, it has always been worthwhile to have variable interest rates on their mortgages.

I was about to fall off the chair when I heard the expert on TV this weekend advising people to choose variable interest rates for their mortgages. The amount saved with variable interest rates could be invested in funds or shares as a buffer in the event of an interest rate increase.