The put-call ratio divides trading volume in put options by volume in call options, conventionally read on equity options in aggregate: a reading near 0.7 has been typical, meaning roughly seven puts traded per ten calls, reflecting the market's structural preference for bullish exposure. Extremes carry the signal: very high readings — above roughly 1.0 on total equity volume — indicate heavy hedging or outright bearish positioning; very low readings, below about 0.5, indicate one-sided optimism. The contrarian logic, documented by sentiment analysts including the indicator's long-time popularizers at the CBOE era desks, is that extremes mark turning points because everyone who could act already has.
The Daily News 24 publishes information, not investment advice. This explainer covers a sentiment indicator.
What are puts and calls, briefly?
A call conveys the right to buy the underlying at a strike price; a put the right to sell. Buyers of calls position for upside; buyers of puts for downside or protection. But volume mixes motives: market makers buy puts to hedge call sales; funds write covered calls; structured products generate both legs mechanically. The ratio aggregates all of it, which is why single-day readings are noise and the moving average is the habit.
Why read it contrarian?
Positioning saturation. When the ratio peaks, bearish positioning is crowded — the marginal seller has sold — leaving flows that can only reverse; when it troughs, optimism is exhausted. The 2020 bottom and the 2022 selloffs both printed ratio extremes near the turns, which is the pattern's best evidence and also its limitation: extremes persist far longer than a trader's patience, and the ratio says nothing about when the turn comes. Practitioners use it as a confirmation input with price, never alone.
Which variant matters?
Total equity put-call ratio versus index-only versus equity-only: index options carry institutional hedging flow, so a high index put-call ratio often reflects routine portfolio insurance rather than panic — the Cboe's own documentation separates these. The equity-only ratio (single-name options) reads speculative sentiment more purely. The Cboe daily volume summary publishes the splits, and intraday versions exist for day traders with all the reliability that implies. Context also shifts the baseline: options volume overall has grown enormously since 2020's retail wave — 0.7 meant something slightly different in a market where zero-day options now dominate volume, a structural change analysts flag when comparing across decades.
What are the failure modes?
Three. Mechanical flow contamination: hedging demand from structured products moves the ratio without any sentiment change. Regime blindness: in a genuine bear market, a high ratio is rational protection, not a bottom signal — the ratio stayed elevated through 2022's decline. And threshold drift: the "extreme" levels quoted in old textbooks assumed a different options market; modern practitioners re-derive bands from recent percentile ranks rather than fixed numbers.
How should readers use it?
As one gauge of positioning among several — alongside the VIX term structure, dealer-gamma estimates, and survey sentiment — and only at extremes, confirmed by price. The ratio's honest summary: it measures what options traders did, which is occasionally what they think, which is occasionally about to matter.
For more context, read What the VIX Actually Measures.
For more context, read credit spreads.
For more context, read How the Dollar Index Works.