Put-Call Ratio (PCR)

Every week, someone asks me the same question — "what's the right PCR to buy at?" And every week, I have to disappoint them with the same answer. There isn't one. PCR is a useful indicator, but not the way most people use it.

That's the summary. The rest of this article is the full picture — what PCR actually measures, why it's calculated two different ways, what the textbook says about reading it, and the four reasons it fails in practice on Indian markets. By the end, you'll know exactly how much weight to put on it. Which, honestly, is less than most beginners think.

Prefer to watch? VRD Rao walks through PCR — calculation, interpretation, and the traps — in 9 minutes.

How PCR Is Calculated

The Put-Call Ratio is exactly what it sounds like. Take all the open put contracts on NIFTY, divide them by all the open call contracts, and that's your number. If puts are higher, PCR is greater than 1. If calls are higher, PCR is less than 1.

There are two versions of PCR you'll see quoted, and they measure slightly different things.

The second version, PCR-Volume, uses the day's trading volume in puts divided by the day's volume in calls. It captures what traders did today, while PCR-OI captures the cumulative positions still standing across all expiries. PCR-OI is what people are usually quoting when they say "the NIFTY PCR is X."

The NSE option-chain page displays options volume and open interest in contracts, and many platforms and broker dashboards use this data to compute PCR. Every options platform — broker dashboards, financial news sites, options analytics tools — reads this same data and computes PCR. There's no proprietary calculation. It's literally one division.

The Textbook Contrarian Interpretation

Here's how every options textbook — Indian or American — teaches you to read PCR. Memorise this part, because it's what every YouTuber, every Telegram channel, and every market-tips peddler will repeat at you.

When PCR is high, it means more puts are open than calls. The standard reading is that the crowd is bearish. The contrarian reading flips this: if everyone is already bearish, the selling may be exhausted, and an oversold bounce becomes more likely. Crowded fear marks bottoms.

When PCR is low, calls dominate puts. The standard reading is bullishness. The contrarian reading: if everyone is already long, who's left to buy?

A reversal becomes more likely. Crowded greed marks tops.

Simple, right? Buy when PCR is high, sell when PCR is low. If only it worked that cleanly. Let me show you why, in practice, this framework gets beginners into trouble.

PCR-OI vs PCR-Volume: Which One Should Beginners Track?

You'll see two versions of PCR quoted on different platforms — PCR-OI and PCR-Volume. They sound similar but tell you very different things.

PCR-OI uses open interest — the total number of put contracts outstanding divided by the total number of call contracts outstanding. It's the option book that still exists. Positions traders are committed to, overnight.

PCR-Volume uses the day's trading volume — puts traded today divided by calls traded today. It captures intraday flow, not commitment. It can swing wildly within a single session, especially on expiry day when scalpers churn both sides.

For beginners, the answer is simple: track PCR-OI first. It shows committed positioning and changes slowly enough that you can actually interpret a shift. PCR-Volume is useful for intraday sentiment once you know what you're doing — but for learning, the OI version gives a steadier signal.

Why PCR Is Overrated

I've used PCR for years. It's on my screen every day. But the way most retail traders treat it — as a buy-sell trigger — is exactly why most retail traders lose money on options. Here are the four real reasons.

1. An option has a buyer and a seller

This is the one nobody on YouTube tells you. When PCR-OI goes up, the textbook says "more puts are being bought, sentiment is bearish." But every put contract has two sides — a buyer and a seller. A high PCR could mean:

Either: retail traders are aggressively buying puts to bet on a fall. (Bearish.)

Or: institutions are aggressively selling puts because they think the market won't fall, and they're collecting premium. (Quietly bullish.)

The PCR number is identical in both cases. You cannot tell from PCR alone which side is doing the heavy lifting. In Indian markets, where a large share of index put-writing is done by institutions and proprietary desks, the second case is more common than beginners realise. A rising PCR-OI is sometimes a sign of strength, not weakness.

2. Institutional hedging distorts the signal

Indian mutual funds and insurance companies hold enormous long equity portfolios. They routinely buy NIFTY puts as portfolio insurance — not because they're predicting a crash, but because their mandate requires hedging. Every quarter, every event, every uncertainty — they roll their hedges.

This pushes put OI structurally higher than call OI. It has nothing to do with "sentiment." It's risk management on a balance sheet.

A "high" PCR in this context is just the market doing its accounting. Treating it as a bearish signal is like seeing fire extinguishers in every office and concluding the city is about to burn down.

3. The "normal range" shifts by regime

The textbook says NIFTY PCR oscillates between 0.7 and 1.3 — useful as a thumb rule, but only in calm periods. In trending bull markets, PCR can sit at 1.4 for weeks because the hedge demand is high. In sharp stress periods — the 2016 demonetisation shock, the 2018 volatility spike, and the Covid crash — PCR can stay above 1.5 for an extended stretch while the index keeps falling.

A PCR of 1.4 in 2017 was a serious bearish extreme. The same 1.4 in March 2020 was a Tuesday. The level that "matters" isn't fixed — it's relative to that market's recent history.

Beginners who memorise a single threshold get whipsawed every time the regime changes.

4. Extreme readings can persist — for weeks

Even when PCR is genuinely extreme, the "reversal" the textbook promises rarely arrives on cue. Markets can stay irrational, as the saying goes, longer than you can stay solvent. PCR can sit above 1.5 for ten sessions while NIFTY drifts another 4% lower. PCR can sit below 0.65 for two weeks while the index melts up another 3%.

PCR tells you the crowd is positioned. It doesn't tell you when the crowd is going to be proven wrong. If you put on trades expecting next-day mean reversion off a PCR signal alone, the cost of being early will eat your account before the move ever shows up.

If you take only one thing from this article: PCR is positioning information, not a trigger. The number tells you where the crowd is leaning. What you do with that is a separate decision that depends on price, volatility, and what's actually happening in the market.

How to Actually Use PCR

So is PCR useless? No. I look at it every morning. But the way I use it has nothing to do with "PCR > 1.3, buy NIFTY." Here's how it earns its place on my screen.

Use it as one of four sentiment inputs, not as a trigger. PCR works best alongside India VIX (volatility regime), FII/DII activity (where institutional money is flowing), and price action (what the chart is actually doing). When three or four of these align, you have a real signal. PCR alone is just noise.

Compare it to its own recent range, not to a fixed threshold. Don't ask "is PCR above 1.3?" Ask "is PCR at the high end of its last 20-session range, and accelerating?"

That comparison is robust across regimes. The fixed-threshold version isn't.

Watch how PCR moves through the day, not just where it ends. A PCR that climbs from 1.0 to 1.4 through a falling NIFTY is telling you a different story than a PCR that opens at 1.4 and slowly settles to 1.2 on a recovery. The direction of change matters as much as the level.

Differentiate event PCR from steady-state PCR. Around RBI policy, Budget, earnings season, and election days, institutional hedging dominates the option book. PCR readings during these windows say very little about retail sentiment. Wait for the event to clear before reading the tape.