Let's pretend you are a lender, and a non-profit one at that. You have scads of savings and checking deposits sitting around that you pay almost nothing in interest to house. The cost of funds is great, but you also know that rates will eventually rise and you will have to pay more on these deposits. What you can invest in is a mix of floating rate (credit card, HELOC, etc.) receivables and fixed rate stuff (mortgages, car loans, etc.). The floating rate stuff is naturally matched with your savings accounts, as both tend to move in rates at the same time. Not so the fixed rate stuff. So you need to put on a portion of fixed rate longer term deposits to hedge your interest rate mismatch. You could go to Wall Street and either borrow money or pay up for derivatives to protect you, or you could just pay up in the deposit market and benefit your members (what you are supposed to do anyway). So you originate a bunch of 5/5 ARMs at 4% and you finance it with half floating rate deposits, 40% 3 to 5 year CDs at an average of 3% and 10% with long term CDSs at 5%. Cost of funds is roughly 1.7%. Voila, you have an interest margin of 2.3%, which should be more than enough to cover your overhead (which is modest because you run lean) and credit losses (which are miniscule because of your very tight underwriting standards and the fact that a large number of your borrowers are employed by the US Govt).
Or maybe you have lost your mind and just want to give money away before 2012 arrives and the Mayans turn out to be correct.