There are many things we need to know while trading futures and options. However, it becomes difficult to trade when you are unaware of future events, news, or other market developments, as these factors can directly impact your positions and trading strategy.
One key concept, MWPL (Market-Wide Position Limit), becomes especially important when a stock experiences significant price movement and also has a low free float. This is not just about price fluctuations — it also affects hedging positions, margin requirements, and, most importantly, trading volume and trading restrictions.
Several things can happen when a stock comes under the MWPL limit.
What is the meaning of MWPL?
The simple meaning of MWPL is this: let’s say a company has 10% free-float shares available for trading. Since only 10% of the company’s shares are freely available in the market, the maximum open interest that can be created in the futures and options segment is based on that free float — so the MWPL limit would be the same as that share quantity.
If any situation arises that increases the company’s free-float shares, the MWPL limit will also increase accordingly. As a result, any changes and their consequences in trading limits will be subject to the revised MWPL limit.
To control risk exposure, SEBI has capped the MWPL limit at 95%. This simply means that traders cannot hold future-equivalent positions exceeding 95% of the Market-Wide Position Limit. If such a situation occurs, the stock enters the F&O ban period, and no fresh positions can be created — only existing positions can be squared off or reduced. This helps control risk exposure by preventing excessive open positions in a particular stock.
MWPL Limit(open interest) vs. MWPL Limit(Future equivalent)
You may have noticed that MWPL is sometimes shown as 115%, 120%, or 130%, while in other places it never exceeds 100%. You may have even noticed that MWPL was 110% one day and 130% the next, and the stock was still traded.
There are two different ways the exchange considers Open Interest (OI) or MWPL data. First, you need to understand Raw Open Interest (Raw OI). Raw OI means the total open interest generated in a particular scrip.
For example, suppose you buy one futures lot of Kaynes. If the lot size is 150 shares, then the Raw OI is simply one lot (150 shares).
Open Interest in MWPL
Now, suppose you also buy five lots of an out-of-the-money (OTM) call option with a premium of ₹40, where the strike price is 10% above the current stock price. In Raw OI, the exchange counts all option lots and futures lots equally, regardless of the option’s delta. Therefore, the total Raw OI would be:
- 1 futures lot
- 5 option lots
This gives a total of 6 lots, which is equivalent to 900 shares (6 × 150). This is how Raw OI is calculated.
Future Equivalent Open Interest
On the other hand, there is Future Equivalent Open Interest (FutEq OI). In this method, option positions are adjusted using their delta.
Using the same example:
- 1 futures lot = 1 future-equivalent lot
- 5 OTM call option lots with a delta of 0.20
The future-equivalent value of the option position is:
5 × 0.20 = 1 future-equivalent lot
Therefore, the total Future Equivalent OI becomes:
1 + 1 = 2 future-equivalent lots
This gives a total of 2 lots, which is equivalent to 300 shares (2 × 150). This is how Raw OI is calculated.
Whereas Raw OI counts all positions as full lots (5 lots in this example), Future Equivalent OI adjusts option positions based on their delta. This is the key difference between Raw Open Interest and Future Equivalent Open Interest.
We often see open interest exceed the MWPL limit, but it is rare to see future equivalent OI exceed the total MWPL.
Live MWPL Data Tracking
When we look at the F&O ban list, one of the most important things to know is whether a stock is likely to come out of the ban on the next trading day.
To determine this, we need to track how much open interest (OI) has been created in both futures and options. We can easily monitor the change in futures OI, but calculating the exact options OI is much more difficult, because we need the open interest for every individual option strike and expiry, and then we must convert all of those positions into their futures equivalent. This is a complex and time-consuming process.
Moreover, the exchanges do not provide real-time Futures Equivalent OI or live MWPL utilization data. Instead, they publish official data files at the end of each trading day. We process these files and update the information in our F&O Ban List, which provides the most reliable way to track the latest MWPL status.
This is important because even if MWPL utilization falls below 80% during the trading session, the stock does not immediately come out of the F&O ban. The exchanges review the official end-of-day data, and if the utilization is below the required threshold, the stock is removed from the ban list on the following trading day. That is why we update the F&O Ban List daily — to let you know whether a stock is expected to remain in the ban or come out of it.
1. What does MWPL mean?
MWPL (Market-Wide Position Limit) is a key concept in futures and options trading. It becomes especially important when a stock experiences significant price movement and also has a low free float. It is not just about price fluctuations — it also affects hedging positions, margin requirements, and, most importantly, trading volume and trading restrictions. The MWPL limit itself is based on a company’s free-float shares: if a company has, say, 10% free-float shares available for trading, the maximum open interest that can be created in the futures and options segment is based on that same free-float quantity.
2. How to track the live MWPL limit?
Exchanges do not provide real-time Future Equivalent OI or live MWPL utilization data. Instead, they publish official data files only at the end of each trading day. These files are processed and used to update the F&O Ban List, which is the most reliable way to track the latest MWPL status and know whether a stock is likely to remain in the ban or come out of it.
3. How is the OI for MWPL calculated?
OI for MWPL is tracked using two methods:
- Raw OI: The exchange counts all futures and options lots equally, regardless of the option’s delta. For example, 1 futures lot + 5 OTM call option lots = 6 total lots (900 shares, at a lot size of 150).
- Future Equivalent OI (FutEq OI): Option positions are adjusted using their delta. Using the same example, 1 futures lot = 1 future-equivalent lot, and 5 OTM call lots with a delta of 0.20 = 1 future-equivalent lot (5 × 0.20). This gives a total of 2 future-equivalent lots.
4. Future Equivalent OI vs. Raw OI — what’s the difference?
Raw OI counts all positions as full lots, regardless of the option’s delta. Future Equivalent OI adjusts option positions based on their delta, so it reflects a more accurate exposure than Raw OI. It is rare to see Future Equivalent OI exceed the total MWPL, even though Raw OI often does.
5. Who decides the MWPL limit?
The MWPL limit is based on a company’s free-float shares — if the free float increases, the MWPL limit increases accordingly, and any changes in trading limits are subject to the revised MWPL limit. To control risk exposure, SEBI has capped the MWPL limit at 95%, meaning traders cannot hold future-equivalent positions exceeding 95% of the Market-Wide Position Limit.