Well all I can say is, you'll find out
There was an TV expose on this very thing about a year and a half ago,
the banks' explanation for this sharing of your financial information is that when you put your signature beside the "x" there was a little line in the fine print that specified they were allowed to "use" this information
The big question was not if they were doing it or not, rather if buying and selling of this information among financial entities was within the terms of the individual's credit/loan application.
So I am not trying to pull your leg, it's being done, if you haven't seen it happen to you or someone you know, probably one day, you will. Maybe unfortunately if you don't think it's happening
Deposit cash in the bank? Cash deposits over specified amounts are automatically flagged and referred to specific federal tax departments.