The derivatives market involves more than just put and call options. There are also contracts involving swapping fixed interest rate payment streams for adjustable or floating interest rate payment streams. A company may have borrowed money under an adjustable interest rate security such as a mortgage and is now fearful that the interest rate is going to rise. It wants to protect itself against rises in the interest rates without going through the refinancing of the mortagage. The company or individual liable for an adjustable rate looks for someone who will pay the adjustable interest payments in return for receipt of fixed rate payments. This is called a swap. The origin of swaps can be identified as a deal made between IBM and the World Bank. For more on swaps and their history see Swaps.