What is a combined Open Interest?
The "open interest" is the number of outstanding contracts for a given security. The "combined open interest" is the sum of the open interest for each contract type (i.e., futures and options).
An index or stock can have one or more contracts for different months. For example, there may be a Reliance future for April & May and an Reliance option for different strike prices for different months. The combined open interest would be the sum of the open interest in all the contracts. Check all stocks listed in derivatives market
What is the Market Wide Position Limit or MWPL, and how does it work?
Open positions on futures and options contracts for a particular underlying stock are limited by the Maximum Allowable Position Length (MWPL).
It is being calculated by lower of either 30 times the daily average number of shares traded during the preceding calendar month in the underlying security or 20% of the number of shares held by non-promoters in the relevant security, which is known as the free float holding.
According to exchange rules, open positions in the securities should not surpass 95% of this 20% limit at the conclusion of the day. To put it another way: If that limit is exceeded, traders are barred from taking new positions until open positions are squared off and the scrip's MWPL value drops to 80 percent of that value.