Patient renter
What kind of nerd are you any way? Where does the sqrt part come from?
Thanks for going to the trouble to post that explanation.
Is it safe to generalize more than you have done? What would be some adequate but less scientific rules of thumb for guestimating rate risk going forward.

SDR? How do you come to your conclusion to decide to lock or not?
Would you be reluctant to sign a contract today where the loan floats for 4 months or more . I would be, unless I was ready for a upward surprise.