Understanding markets · Sentiment
Put-Call Ratio: What It Means and How to Read It
The put-call ratio (PCR) divides the number of puts traded by the number of calls traded, measured either by daily volume or by open interest. A reading above 1 means more puts than calls changed hands. Many investors use it as a sentiment gauge – usually in a contrarian way: extreme fear can point to a coming rebound, extreme complacency to a higher risk of a setback.
On its own, the PCR is not a buy or sell signal. To use it, you need to know which ratio you are looking at and who is behind the numbers.
By Daniel Berg ·
What the put-call ratio measures
A put gains when the underlying falls, a call when it rises. The put-call ratio sets the two against each other and so shows how strongly traders are positioning or hedging against falling prices. It comes in two main versions that answer different questions.
Volume PCR
Put volume divided by call volume for one day. It shows current trading activity and reacts quickly, but swings a lot from day to day. The glossary explains what volume counts.
Open interest PCR
Open put contracts divided by open call contracts. It describes the stock of positions and moves more slowly. Our options chain guide explains volume versus open interest.
Premium-weighted PCR
Some data providers weight by premium paid instead of contract count, so an expensive in-the-money put counts for more than a cheap far out-of-the-money one.
Worked example · illustrative, not market data
- Puts traded
- 600,000 contracts
- Calls traded
- 500,000 contracts
- Volume PCR (600,000 ÷ 500,000)
- 1.20
- Open puts (open interest)
- 2,000,000 contracts
- Open calls (open interest)
- 2,500,000 contracts
- Open interest PCR (2,000,000 ÷ 2,500,000)
- 0.80
Both figures come from the same fictional market and seem to contradict each other: many puts traded today, yet calls dominate the open positions. That is not an error – it is why you always have to say which ratio you mean.
Equity PCR, index PCR, total PCR: three different numbers
Exchanges such as Cboe in the US publish several put-call ratios every day: one for options on individual stocks, one for index options and one for the market as a whole. When a headline says “PCR at 1.2”, the first question is which one, because their normal ranges are far apart.
| Ratio | Who dominates | Typical level |
|---|---|---|
| Equity PCR | Retail traders and single-stock speculation | usually below 1, because more calls than puts trade |
| Index PCR | Institutional portfolio hedging | often above 1, because index puts serve as insurance |
| Total PCR | A mix of both | in between, depending on the weight of index options |
The reason for the gap: funds and insurers prefer to protect large equity holdings with index puts. Those puts are ongoing insurance, not a bet on a crash, so a high index PCR is often business as usual. For sentiment work, the equity PCR is usually considered more informative because speculative positioning shows up there.
Treat fixed thresholds with care
Articles like to quote ranges such as “normal is 0.7 to 1.0”. Such ranges depend on the ratio, the data source and the period, and they drift over the years – for example with the growth of very short-dated options. Comparing a reading with the same ratio’s own history is more useful.
Reading the PCR as a contrarian indicator
The classic reading is contrarian. The reasoning: when nearly everyone is afraid and has already hedged or sold, few sellers are left to keep pushing prices down. When the PCR rises to a level that is unusually high for it, pessimism may be overdone. Conversely, an unusually low PCR shows that hardly anyone is hedging and many are betting on higher prices – an environment in which negative surprises can hit harder.
- 01
Smooth it
Daily readings are noisy. A moving average over, say, 10 or 20 trading days shows the trend in sentiment better than a single outlier.
- 02
Relative, not absolute
Compare the current reading with the range of the same ratio over recent months. What matters is whether it sits at the top or bottom of that range, not whether it is above 1.
- 03
Check it against price
A high PCR in a falling market is fear. A rising PCR while prices climb can mean investors are protecting gains – which is not the same as panic.
- 04
Add other indicators
Whether protection is currently expensive shows up in implied volatility. A high PCR together with high IV and a steep put skew is a much stronger fear signal than the PCR alone.
Not a timing tool
Extreme readings can persist for weeks, and the crowd is sometimes right. A high PCR does not protect you from further losses. It describes how the market is positioned, not what happens next.
Pitfalls: why the number can mislead
The PCR counts contracts, but it says nothing about who bought and who sold, or why. Most misreadings start there.
Volume has no direction
Every put traded has a buyer and a seller. If an investor sells puts because they are happy to buy the stock cheaper, that is a bullish position – yet it still adds to put volume and raises the PCR.
Hedging is not a bet
A fund that buys index puts is often just protecting an existing portfolio and stays invested. A high PCR can therefore reflect well-hedged optimists rather than panicking pessimists.
Covered calls push the ratio down
Writing covered calls on shares you own creates call volume without any bullish speculation. Heavy call writing lowers the PCR and makes the market look more optimistic than it is.
Single large orders
In thinly traded single stocks, one large order can distort the ratio. If a fund buys 20,000 puts as a hedge in a stock that normally trades 10,000 puts and 20,000 calls a day, that day’s PCR jumps from 0.5 to 1.5.
Spreads and combinations
Complex strategies have several legs. A put spread creates volume in two puts, a risk reversal in one put and one call. The ratio counts legs, not intent.
Short-dated options
Options with very little time to expiry, especially on indices, now make up a large share of daily volume. They are often opened and closed within the day and move the volume PCR without saying much about medium-term sentiment.
How options traders use the put-call ratio
For options traders the PCR is less a directional signal than a clue to where supply and demand sit in the options chain – and therefore which options may currently be expensive or cheap.
- Gauge the premium environment: a high PCR often comes with strong demand for puts and elevated implied volatility. Option sellers collect more premium then, but also risk standing against a majority that is afraid for good reason. Premium strategies such as the cash-secured put need a clear risk limit.
- Buy protection when it is cheap: a very low PCR alongside low implied volatility means little demand for protection. If you intend to hedge anyway, such phases often offer better prices than after a sell-off.
- Look at the strike level: where volume and open interest cluster is often more interesting than the total. Our guide on how to read an options chain shows how to spot it.
- Interpret single stocks with care: in individual names, hedges by large shareholders, convertible arbitrage or dividend strategies overlay sentiment. The PCR only tells you much about a single stock if you know the large trades behind it.
Worked example · illustrative, not market data
- Equity PCR, 10-day average
- at the top of its own one-year range
- Index price trend
- falling for several weeks
- Implied volatility
- sharply higher
- Interpretation
- elevated fear, protection expensive
This combination points to a fearful market in which a lot of protection has already been bought. A contrarian would see a possible turning point, an option seller rich premiums. Neither knows whether the low is in. The example is a thinking exercise, not a trade recommendation.
Frequently asked questions
What is the put-call ratio in simple terms?
The put-call ratio divides the number of puts traded or open by the number of calls. A reading above 1 means more puts than calls and points to more hedging or pessimism; below 1 means more calls and more optimism.
What is a normal put-call ratio?
It depends on which ratio you mean. The equity put-call ratio is usually below 1, while the index ratio is often above 1 because index puts are used for portfolio hedging. Fixed thresholds drift over the years, so it is more useful to compare a reading with the same ratio’s own history.
Is a high put-call ratio bullish or bearish?
At face value it shows pessimism. Read as a contrarian indicator, an unusually high reading can signal overdone fear and a possible rebound. It is not a reliable buy signal, because extreme readings can persist.
What is the difference between volume and open interest PCR?
The volume PCR uses the contracts traded in one day and reacts quickly. The open interest PCR uses outstanding positions and moves more slowly. The two can point in different directions at the same time.
Why is the index put-call ratio higher than the equity ratio?
Institutions prefer to hedge large stock portfolios with index puts. That hedging is routine business, not a crash bet, so the index ratio sits structurally higher, while the equity ratio shows more of retail traders’ speculation.
Where can I find the put-call ratio?
Cboe publishes daily put-call ratios for equity options, index options and the total market. Many brokers and data providers also show ratios for individual underlyings, often split by volume and open interest.
Can I time trades with the put-call ratio?
Only very roughly. The ratio describes how the market is positioned, not where prices go next. It works best alongside price trend, implied volatility and your own risk management, not as a stand-alone signal.
Sources and context
All figures in the examples are round, fictional teaching values, not current market data. Definitions follow the sources below. This guide is educational and is not investment advice.