Tools & Calculators
By Shishta Dutta | Updated at: May 18, 2025 10:46 PM IST
Open Interest (OI) refers to the total number of unsettled contracts in the market. So, traders often consider open interest a market sentiment indicator as it can help traders make informed decisions
Traders can gain market trend insights with open interest analysis and correlating it with price movements. This will help them make strategies for effective risk management. Hedging with future contracts and buying put options are advanced portfolio management techniques.
Let us look at a few of these approaches. We will focus on F&O trading strategies protecting assets and capitalising on trends. We will also use real-world scenarios to showcase the importance of open interest in trading.
As discussed, open interest refers to the number of unsettled contracts in the market and is a good measure of market sentiment. High open interest often signifies huge trading volume. You can find the direction and strength of market trends by analysing open interest for F&O trading. This will also help you decide whether you should take bullish or bearish positions.
Let us take an example – the open interest in futures and options increases with the price. This suggests the creation of new, long positions and positive sentiment. While, rising open interest with price drops signify bearish sentiment. Combining open interest analysis with price action will help you better understand potential market movements.
Using options is one of the simplest ways of hedging. When traders suspect a decline in a stock’s price or its index, they can buy put options to protect their investments. Put options are a popular tool used in F&O trading strategies. It limits the downside risk without selling assets. High open interest in put options generally suggests that many traders are expecting a drop. This is why it is a useful indicator and helps decide whether to hedge with puts or not.
Consider a stock trading at ₹2,500 with an open interest of 200,000 contracts, and the strike price is set at ₹2,450. This high open interest signifies that traders are hedging against a decline. So, here is a great opportunity for another trader to enter a protective position at the same strike price.
Selling future contracts to hedge against market downturns can be useful when you want to stay invested but expect some volatility. You can also short the market with futures and counterbalance potential losses in long positions.
Suppose a trader has a portfolio of Indian stocks and expects a temporary decline in the market due to economic news. They can sell Nifty futures to cover any potential downturns. If the market falls, the stock portfolio’s loss is offset by gains from the short futures position.
You should use open interest in futures and options and price movement analysis to make informed decisions. Rising prices combined with increasing open interest suggests a continuity of the current trend. On the other hand, falling prices and increasing open interest might indicate that the trend is about to reverse.
Let us suppose stock A is trading at ₹1,600 with an open interest of 100,000 in call options at ₹1,650 and 50,000 input options at ₹1,550. Here, the higher call option open interest suggests a bullish sentiment. If the stock price reaches ₹1,700, a trader with call options can capitalise on the upward movement. This confirms the conclusion we reached after analysing open interest for F&O trading.
Open interest analysis and advanced hedging techniques help make data-driven decisions. It helps reduce risk in unpredictable markets. It is important to understand market sentiment in F&O trading. We recommend you master how to analyse open interest for F&O, stay informed, and hedge when market conditions suggest risk.
You can find open interest data for F&O trading contracts on major stock exchange websites, like the NSE and BSE. You can also find them through brokerage platforms that offer open interest analysis tools.
Yes, analysing open interest for F&O trading alone has limitations, as it lacks price context. Combining open interest with other indicators, such as volume and price, helps make good F&O trading strategies.
To analyse open interest with price trends, observe if both rise, indicating a strong trend or diverge, signalling a potential reversal. This open Interest analysis helps gauge market sentiment.