Put Call Ratio: Meaning, Formula, Nifty PCR and How to Use It in Options Trading

Aug 28, 2024•Updated Sep 15, 2026•6 min read

The Put Call Ratio, or PCR, is an options indicator that compares put activity against call activity to show how the options market is positioned.

It is calculated in two ways: using open interest, which shows positions still outstanding, or using volume, which shows contracts traded in a period.

Traders watch it because sharp changes in the ratio often show sentiment shifting before price does. It is context rather than a signal, and this guide covers how to calculate it, what different values mean, and how to read Nifty PCR specifically.

What Is the Put Call Ratio?

The Put Call Ratio measures the relationship between put and call activity in the options market. A ratio above 1 means more put activity than call activity. Below 1 means the reverse.

The common shorthand says high PCR is bullish and low PCR is bearish, on the logic that heavy put writing signals confidence and heavy call writing signals caution.

That shorthand is useful as a starting point and unreliable as a rule. The same ratio can mean opposite things depending on whether those positions were created by buyers or writers, whether they are speculative or hedges, and what price is doing at the time. PCR tells you the shape of positioning. It does not tell you what will happen next.

PCR Formula: How to Calculate the Put Call Ratio

There are two formulas, and it matters which one you are looking at.

Open interest PCR

PCR (OI) = Total Put Open Interest ÷ Total Call Open Interest

Volume PCR

PCR (Volume) = Total Put Volume ÷ Total Call Volume

To calculate it yourself:

Pick a time frame, whether intraday, daily or across an expiry.
Collect total put and total call figures for that period, available from the exchange option chain or your trading platform.
Divide the put figure by the call figure.

If an index has 12 lakh put contracts and 10 lakh call contracts in open interest, the PCR is 12 ÷ 10 = 1.20.

Open interest PCR shows positioning that remains in the market. Volume PCR shows activity during the period you chose. They can point in different directions, and the difference between them is often more informative than either reading alone.

What Do PCR Values Mean?

There are no official thresholds, and the bands below are conventions rather than rules. They are a starting point for interpretation, not a lookup table for trades.

PCR value	What it indicates	How traders commonly read it
Below 0.5	Call activity heavily outweighs put activity	Often read as excessive optimism, which contrarians treat as a caution signal
0.5 to 0.7	Call activity clearly higher	Leaning bearish on conventional reading
0.7 to 1.0	Moderately more call than put activity	Broadly neutral for index options
1.0	Put and call activity balanced	Neutral
1.0 to 1.5	Put activity clearly higher	Leaning bullish on conventional reading
Above 1.5	Put activity heavily outweighs call activity	Often read as excessive pessimism, which contrarians treat as a potential bottom

Two cautions on using this table.

Normal ranges differ by instrument. Index options typically run at different PCR levels than single stock options, so a reading that is unusual for Nifty may be ordinary for a stock. Compare a reading against that instrument's own recent range rather than against a universal benchmark.

The direction of travel matters more than the level. A PCR moving from 0.8 to 1.2 over a week tells you more than a static 1.2 does.

What Is Nifty Put Call Ratio?

Nifty PCR applies the same calculation to NIFTY index options specifically. It is the most watched PCR reading in the Indian market because NIFTY options carry the highest participation.

Nifty PCR = Total Put Open Interest ÷ Total Call Open Interest

Nifty PCR based on open interest is the more commonly quoted version. The volume-based version is more responsive intraday but noisier, since it counts positions opened and closed within the session.

How to Check Nifty PCR Today

The figure changes continuously through the session, so where you check matters as much as how you read it.

The NSE option chain publishes put and call open interest by strike, from which the total PCR is derived.
Most trading platforms display PCR directly, though the expiry they default to varies.
PCR differs between weekly and monthly expiries, because each carries a different open interest structure. Always confirm which expiry you are looking at.

Tracking how Nifty PCR moves through the session is generally more useful than a single snapshot. A reading taken at 9:30 AM reflects a much thinner order book than one at 2:30 PM.

How to Read Nifty PCR Against Price

The reading only becomes meaningful when you place it beside what NIFTY is doing.

PCR rising while NIFTY rises. Put writing is increasing into strength, which conventionally supports the uptrend.
PCR falling as NIFTY approaches resistance. Call writing is increasing, suggesting writers expect limited upside.
PCR falling while NIFTY falls. Call writing is active in a downtrend, conventionally read as bearish.
PCR at an extreme against its own recent range. This is where contrarian readings apply, and where confirmation from price matters most.

A PCR of 1.20 is not automatically bullish. The same number means different things near expiry, after a gap opening, or in the middle of a trending move.

For a fuller picture of how positioning is shifting, read PCR alongside open interest changes. Our guide on how to read Nifty OI data covers the four price-and-OI combinations that give PCR its context.

Sensex PCR

The same calculation applies to SENSEX options.

Sensex PCR = Total Put OI ÷ Total Call OI

Open the Sensex option chain and select your expiry, then compare the PCR against spot price movement, open interest across key strikes, change in OI, and previous readings.

Sensex and Nifty PCR can diverge, and a meaningful gap between them is worth examining rather than ignoring.

Using PCR as a Contrarian Indicator

The contrarian case rests on a simple idea: when positioning becomes lopsided, the crowd has already acted, and there is less fuel left for the move to continue.

Situation	Conventional reading
PCR rises as dips are bought during an uptrend	Bullish. Put writers are selling into weakness, expecting the trend to hold.
PCR falls as the market tests resistance	Bearish. Call writers are opening positions, expecting limited upside.
PCR falls during a downtrend	Bearish. Writers are actively selling call strikes.
PCR reaches an extreme against its own range	Potential reversal zone, but only with price confirmation.

Contrarian readings fail most often at exactly the moments they look most compelling, because extremes can persist far longer than expected during strong trends.

Limitations of the Put Call Ratio

PCR is widely used and widely over-read. Its weaknesses are specific.

It shows no motive. A hedge against a cash portfolio and a directional bet produce identical open interest.
It counts contracts, not value. Contract sizes and premiums differ, so the ratio can be skewed by activity in cheap out-of-the-money strikes.
Time frames are inconsistent. Different sources calculate PCR over different periods and expiries, which is why two websites can show different numbers for the same index on the same day.
It lags at extremes. During tail events such as the COVID crash, PCR gave little warning of the turning point.
It is incomplete on its own. PCR reflects only options activity, and says nothing about volume patterns, price structure or fundamentals.

For a fuller view of who holds which side of the market, participant-level data is more revealing than the aggregate ratio.

Common Mistakes When Reading PCR

Traders treat a high PCR as automatically bullish, when the same reading can reflect heavy hedging rather than confidence.
Traders compare a stock's PCR against index benchmarks, ignoring that normal ranges differ by instrument.
Traders read a single value rather than the trend, losing the information that the direction of change carries.
Traders mix open interest PCR and volume PCR without noticing which one their platform is showing.
Traders compare PCR across different expiries, when weekly and monthly contracts carry different OI structures.

How to Read the Nifty Option Chain Like a Pro

Conclusion

PCR is most useful when you read it as context rather than instruction. Check which version your platform shows, compare the reading against that instrument's own recent range, and confirm it against price before acting on anything.

Backtesting on AlgoTest lets you check whether a PCR-based rule has actually worked across years of data instead of across memory. Sign up for free and get 25 backtests every Monday before risking real capital.

Disclaimer: This article is for educational purposes only and is not investment, tax or legal advice. Market data and platform features can change.

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Frequently Asked Questions

What is the Put Call Ratio?

The Put Call Ratio, or PCR, is an options indicator comparing put activity against call activity. It is calculated using either open interest or volume, and shows how the options market is positioned.

What is the PCR formula?

PCR based on open interest is total put open interest divided by total call open interest. PCR based on volume is total put volume divided by total call volume.

What does a PCR of 0.5 mean?

A PCR of 0.5 means call activity is roughly double put activity. On the conventional reading this leans bearish, though contrarians treat very low readings as a sign of excessive optimism. Compare it against that instrument's own recent range before drawing a conclusion.

What does a PCR above 1 mean?

It means put activity exceeds call activity. This is conventionally read as bullish, on the logic that put writers are confident, but it can equally reflect hedging rather than optimism.

What is a good PCR ratio?

There is no universally good value. Readings between 0.7 and 1.0 are broadly neutral for index options, but normal ranges differ by instrument and market condition. The trend in PCR matters more than any single level.

What is Nifty PCR?

Nifty PCR applies the put call ratio to NIFTY index options, usually calculated as total put open interest divided by total call open interest across a selected expiry.

How do I check Nifty PCR today?

The NSE option chain publishes put and call open interest by strike, and most trading platforms display PCR directly. Confirm which expiry you are viewing, since weekly and monthly contracts show different readings.

What is the difference between OI PCR and volume PCR?

Open interest PCR reflects positions still outstanding in the market. Volume PCR reflects contracts traded during the chosen period, including positions opened and closed the same day.

Is PCR a reliable indicator on its own?

No. PCR shows positioning, not direction or motive. It works best alongside price action, open interest changes and other indicators rather than as a standalone signal.