Direct Answer
Put option volume divided by call option volume on single-stock options, as published by Cboe for its equity-only ratio. It reflects how much options activity is pointed at downside protection or bearish bets versus upside bets on individual companies. A higher ratio means relatively more put trading and a lower one more call trading.
Equity Put/Call Ratio: Formula, Meaning, Signals, Examples and How to Use It
How Is Equity Put/Call Ratio Calculated?
Put option volume divided by call option volume on single-stock options, as published by Cboe for its equity-only ratio. It reflects how much options activity is pointed at downside protection or bearish bets versus upside bets on individual companies.
Formula: Equity put/call = total equity put volume / total equity call volume
Inputs:
- Daily put volume on equity options
- Daily call volume on equity options
Worked example. If 640,000 put contracts and 1,020,000 call contracts trade in a day, the ratio is 0.63. The inputs are illustrative numbers, not market data.
Reading it. A higher ratio means relatively more put trading and a lower one more call trading. Because retail traders are heavy users of single-stock calls, the equity ratio is usually below 1, and analysts view unusually high readings as fear and unusually low ones as complacency, often with a contrarian bent.
Limits. Volume includes hedges, spreads and dealer activity, so it is not a clean view of directional opinion. It differs from the index and total put/call ratios in who trades and why.
What is Equity Put/Call Ratio?
Put option volume divided by call option volume on single-stock options, as published by Cboe for its equity-only ratio. It reflects how much options activity is pointed at downside protection or bearish bets versus upside bets on individual companies.
How to use Equity Put/Call Ratio
A higher ratio means relatively more put trading and a lower one more call trading. Because retail traders are heavy users of single-stock calls, the equity ratio is usually below 1, and analysts view unusually high readings as fear and unusually low ones as complacency, often with a contrarian bent. A reading alone is never a buy or sell signal; it needs context from price structure, volume, volatility and the broader market regime.
Strengths
- Restricting the count to single-stock options removes index hedging volume, leaving activity tied to individual companies.
- Volume is tallied for every put and call each trading day, so the ratio comes from a complete daily count with no estimation.
- Reproducible when the formula and data convention are fixed.
Weaknesses and limitations
- Volume does not separate buying a put from selling one, so the direction of the trade is not known from the count.
- Earnings clusters and other event-driven days can concentrate volume in a few active stocks and push the ratio from its usual range.
- Correlated indicators can create false confidence by repeating the same underlying information.
Editorial and risk note
This page is educational content, not individualized investment advice. It should not imply guaranteed prediction, accuracy or outperformance.
Frequently Asked Questions
Is Equity Put/Call Ratio a buy or sell signal?
No. A higher ratio means relatively more put trading and a lower one more call trading. Volume includes hedges, spreads and dealer activity, so it is not a clean view of directional opinion. A trade built on it still needs a trigger, an invalidation rule, a position size and realistic execution assumptions.
What is the best setting for Equity Put/Call Ratio?
Equity Put/Call Ratio is computed from daily put volume on equity options; daily call volume on equity options, so the choices that matter are the data convention and the window it is read over. Test those across instruments, regimes and out-of-sample periods instead of fitting one historical winner.
Can Equity Put/Call Ratio be used by itself?
Volume includes hedges, spreads and dealer activity, so it is not a clean view of directional opinion. It differs from the index and total put/call ratios in who trades and why. For that reason it is read next to measures of direction, participation, valuation, liquidity and risk, not alone.
Does Equity Put/Call Ratio work on every timeframe?
The calculation (Equity put/call = total equity put volume / total equity call volume) can be run on any bar size, but behavior is not portable: a reading on a five-minute chart describes a very different market window from the same reading on a daily chart. Validate the exact timeframe before relying on it.
Why does Equity Put/Call Ratio give false signals?
Volume does not separate buying a put from selling one, so the direction of the trade is not known from the count. Earnings clusters and other event-driven days can concentrate volume in a few active stocks and push the ratio from its usual range. Lag, noise and regime changes add to this, because market participants react to new information after the reading is calculated.
How should Equity Put/Call Ratio be backtested?
Rebuild Equity Put/Call Ratio from daily put volume on equity options using point-in-time data, write the rules before testing, include delisted securities where relevant, model realistic fills and costs, reserve a validation sample and compare with a simpler baseline.