When you are talking about the costs to borrow any treasury department and anyone in the investment financial world would understand what a prime based loan is. That doesn't mean the loan is at the prime rate but is at some rate reflective of prime. The same comment could be made about loans based on the Feds Fund overnight rate. It doesn't mean the loan is at the rate but is simply based on it. Loans in the investment business are just not based on some derivative or option market synthetic calculation.