Put-Call Ratio
Put volume divided by call volume
What is Put-Call Ratio?
Put-Call Ratio The put-call ratio (PCR) is the ratio of total put options trading to total call options trading, typically measured by volume or by open interest. A PCR of 1.0 means equal put and call activity. A PCR above 1.0 means more put activity (bearish positioning). Below 1.0 means more call activity (bullish positioning). PCR is a widely-cited sentiment indicator, particularly used as a contrarian signal. Conventional interpretation: - PCR very high (above 1.2 on equity indices): retail and institutional players heavily hedging or speculating on downside — potentially a bullish contrarian signal as fear peaks. - PCR very low (below 0.6): excessive bullish positioning — potentially a bearish contrarian signal as complacency peaks. - PCR around 0.7-0.9: typical equity-market baseline; no strong sentiment signal. The "right" PCR baseline varies by underlying. SPX has a structurally elevated PCR (often 0.8-1.1) because of institutional put-hedging flow. Single stocks typically run lower PCR (0.5-0.8) because retail call buying dominates. PCR can be measured two ways: - Volume PCR: Today's put volume / today's call volume. Faster-reacting; reflects current trading flow. - Open Interest PCR: Total put OI / total call OI across all strikes. Slower; reflects accumulated positioning. Most sentiment-focused traders watch volume PCR for short-term signals and OI PCR for regime context. PCR has limitations. Not every put is bearish — institutional players buy puts as portfolio insurance even in bullish setups. Not every call is bullish — covered call sellers write calls without being directionally bullish. A high PCR could simply reflect hedging flows, not bearish speculation. Critically, PCR does not account for the dollar size of positions. A retail trader buying 100 puts at $1 each shows up as 100 contracts in volume; an institutional trader buying 1,000 puts at $5 each shows up as 1,000 contracts. The dollar exposure is dramatically different but PCR weighs them equally. For institutional-grade sentiment analysis, dollar-weighted put-call ratio is preferred. Despite its limitations, PCR remains a useful broad sentiment gauge, particularly at extreme readings. PCR spikes above 1.5 on SPX have historically coincided with market bottoms; PCR below 0.5 has correlated with market tops.
Complete Definition
The put-call ratio (PCR) is the ratio of total put options trading to total call options trading, typically measured by volume or by open interest. A PCR of 1.0 means equal put and call activity. A PCR above 1.0 means more put activity (bearish positioning). Below 1.0 means more call activity (bullish positioning). PCR is a widely-cited sentiment indicator, particularly used as a contrarian signal. Conventional interpretation: - PCR very high (above 1.2 on equity indices): retail and institutional players heavily hedging or speculating on downside — potentially a bullish contrarian signal as fear peaks. - PCR very low (below 0.6): excessive bullish positioning — potentially a bearish contrarian signal as complacency peaks. - PCR around 0.7-0.9: typical equity-market baseline; no strong sentiment signal. The "right" PCR baseline varies by underlying. SPX has a structurally elevated PCR (often 0.8-1.1) because of institutional put-hedging flow. Single stocks typically run lower PCR (0.5-0.8) because retail call buying dominates. PCR can be measured two ways: - Volume PCR: Today's put volume / today's call volume. Faster-reacting; reflects current trading flow. - Open Interest PCR: Total put OI / total call OI across all strikes. Slower; reflects accumulated positioning. Most sentiment-focused traders watch volume PCR for short-term signals and OI PCR for regime context. PCR has limitations. Not every put is bearish — institutional players buy puts as portfolio insurance even in bullish setups. Not every call is bullish — covered call sellers write calls without being directionally bullish. A high PCR could simply reflect hedging flows, not bearish speculation. Critically, PCR does not account for the dollar size of positions. A retail trader buying 100 puts at $1 each shows up as 100 contracts in volume; an institutional trader buying 1,000 puts at $5 each shows up as 1,000 contracts. The dollar exposure is dramatically different but PCR weighs them equally. For institutional-grade sentiment analysis, dollar-weighted put-call ratio is preferred. Despite its limitations, PCR remains a useful broad sentiment gauge, particularly at extreme readings. PCR spikes above 1.5 on SPX have historically coincided with market bottoms; PCR below 0.5 has correlated with market tops.
Example
SPX put-call ratio reading 1.45 during the August 2024 yen carry unwind. This was one of the highest readings since March 2020. Markets bottomed within 5 trading days and rallied 12% over the following 6 weeks — classic contrarian signal at PCR extremes.
Related Terms
Frequently Asked Questions
What is the put-call ratio?
The put-call ratio is the ratio of put options traded (or held) to call options. Above 1.0 means more puts (bearish positioning); below 1.0 means more calls (bullish positioning). Widely used as a contrarian sentiment indicator.
What's a normal put-call ratio?
For equity indices (SPX, SPY), 0.8-1.1 is typical. For single stocks, 0.5-0.8 is normal. Extremes (above 1.5 or below 0.5) are unusual and often signal sentiment turning points.
Is the put-call ratio a reliable predictor?
It's useful at extremes but unreliable in normal ranges. Very high PCR readings have historically marked market bottoms; very low readings have marked tops. Inside the normal range, PCR provides little directional signal. Always combine with other indicators.
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