Open Interest Calculation
Open Interest is calculated by adding up all the long positions (buyers) and short positions (sellers) in a specific options or futures contract. The formula for calculating Open Interest is,
Open Interest = Total Open Long Positions + Total Open Short Positions
For example, if there are 500 long positions (buyers) and 300 short positions (sellers) in a futures contract, the Open Interest would be,
Open Interest = 500 + 300 = 800