I have only six hands.
Net borrowing doesn’t affect FCFF because FCFF is measuring cash flow generated by the business; borrowing isn’t generated by the business, and its net effect is zero (the business borrows it, the business has to pay it back).
Net borrowing does affect FCFE because that’s cash that could be given to the shareholders if management wanted to. Not a good idea, perhaps, but a possible one. Note that, unlike the firm, which has to pay back the borrowing, equity doesn’t have to pay back the borrowing; it’s assumed that it will be paid back by cash flow generated by operations.
Thus, the day that you borrow money, it’s all available to equity, so FCFE increases.
Alas, the firm has to make coupon payments to the bondholders. The good news is that the government loves the firm, and pays part of that coupon for them (lower taxes). Unfortunately, when that cash (net of taxes) goes to the bondholders, the stockholders cannot get their hands on it, so it lowers FCFE (in the years after the money was borrowed). And, of course, when the bonds are paid off, that cash flow also lowers FCFE (it’s included in “net borrowing” as a negative number).
I think that that’s it.
May I go back to my Caol Ila now?