It depends. Sometimes with shares, sometimes with nominal principal. Because the nominal principal of some interest-related derivatives is not necessarily the same for each lot or contract (although the international practice usually defines the face value of each bond as 100), such as Eurodollar interest rate futures, the nominal principal of each contract is 100, while the nominal principal of US Treasury futures is 100. Obviously, these derivative contracts with different interest rates have different nominal principal, so they are generally measured by nominal principal. If the relationship between the nominal principal of interest rate-related derivative positions established by investors is clear, in this case, the holding share can be used for measurement.

Position (position: the inventory of a market trader) is a market agreement, which promises to buy and sell the initial position of foreign exchange contracts, and those who buy foreign exchange contracts are long and in the expected position; Selling foreign exchange contracts is an empty position and is in the expected position. Position can refer to the amount of funds owned or borrowed by investors.