What Is the Put/Call Ratio?
The put/call ratio divides the total volume of put options traded by the total volume of call options traded on a given day or period. A reading above 1.0 means more puts (bearish bets) traded than calls (bullish bets). Below 1.0 means more calls than puts.
Three versions exist, each with different uses:
| Ratio Type | What It Measures | Best For |
|---|---|---|
| CBOE Equity P/C | Individual stock options only | Retail sentiment (most contrarian value) |
| CBOE Total P/C | All options including index | Overall market tone |
| Index-Only P/C | SPX, NDX index options | Institutional hedging activity |
The equity put/call ratio is the most useful for sentiment analysis because it captures retail and speculative behaviour more cleanly. Index options include structural hedging programs that distort the signal.
How to Read the Ratio
Use the 5-Day or 10-Day Moving Average
Single-day readings are noisy — expiration days, large institutional trades, and event-driven hedging create spikes that mean nothing. Always smooth with a 5-day or 10-day moving average for signal quality.
Contrarian Logic
The put/call ratio works as a contrarian indicator because:
- When everyone is buying puts (ratio > 1.0), maximum hedging is already in place. The downside is "priced in" at the options level. Selling pressure is exhausted. The path of least resistance is up
- When everyone is buying calls (ratio < 0.55), speculative froth dominates. No one is hedging. A shock of any kind creates forced selling from unhedged positions. Vulnerability is maximum
Historical Extremes & Outcomes
| Date | 5-Day Equity P/C | Context | S&P Next 30 Days |
|---|---|---|---|
| Mar 2020 | 1.42 | COVID panic peak | +18.7% |
| Dec 2018 | 1.28 | Rate hike fear / China trade war | +12.3% |
| Oct 2022 | 1.15 | Bear market capitulation | +9.8% |
| Jan 2021 | 0.42 | Meme stock mania (GME/AMC) | -4.2% |
| Nov 2021 | 0.48 | Peak SPAC/crypto euphoria | -7.1% |
| Jul 2023 | 0.52 | AI rally complacency | -3.8% |
A Trading Framework Using Put/Call
For Entry Timing
- Identify a stock or ETF you want to own based on fundamentals or technicals
- Check the market-wide P/C ratio. If it's above 0.90, conditions favour new longs (sentiment is fearful, likely near a bounce)
- If P/C is below 0.60, wait. Even if the setup looks good, entering during peak complacency increases the odds of a drawdown before recovery
- Size accordingly: Full position size when P/C > 1.0. Half size when 0.80–1.0. Quarter size or hold when 0.60–0.80. No new longs below 0.55
For Hedging Decisions
- P/C below 0.55: Buy protective puts or put spreads. Cheap insurance when nobody else is buying it
- P/C above 1.0: Sell puts instead. When everyone is hedging, put premiums are elevated — you get paid generously for taking the other side
Current Reading: May 2026
The 5-day equity P/C sits at 0.67 — lower half of the neutral zone. Traders are leaning bullish but haven't reached the speculative extremes below 0.55 that preceded corrections in 2021 and 2023. After 8 straight winning weeks on the S&P, the lack of put buying signals complacency is building but hasn't peaked.
Watch level: If the 5-day ratio drops below 0.55, treat it as an orange flag. It means speculative positioning has reached levels where a 3–5% pullback becomes significantly more likely within the following 30 days.
This reading is incorporated into our weekly composite sentiment model and paired with breadth and survey data for higher-confidence signals delivered to Proflex All-Access members.