Mortgage recasting ...when to do

[Gene Jung]

Hi,

Assume there is no cost for mortgage requesting for my lender. Assume my marginal income tax bracket is very high, and mortgage rate is 5.25%. If I have lump-sum free cash, should I just apply it to my mortgage to recast so that my monthly goes lower? Or should I just put them into stock market? If mortgage rate were < 3.5%, then there is no need for recasting...but 5.25 seems like a border line. To beat 5.25% mortgage rate....the corresponding, offsetting stock market return would be at least double that...