Put/Call Ratio¶
In finance the put/call ratio (or put-call ratio, PCR) is a technical indicator demonstrating investor sentiment.
Core Idea¶
Put/Call Ratio is treated here as the recurring formal models and representations identity summarized by this source-grounded definition: In finance the put/call ratio (or put-call ratio, PCR) is a technical indicator demonstrating investor sentiment. In finance the put/call ratio (or put-call ratio, PCR) is a technical indicator demonstrating investor sentiment. The ratio represents a proportion between all the put options and all the call options purchased on any given day. The put/call ratio can be calculated for any individual stock, as well as for any index, or can be aggregated.
Scope of Application¶
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Readings. Generally, a lower reading (~0.6) of the ratio reflects a bullish sentiment among investors as they buy more calls, anticipating an uptrend.
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Readings. Conversely, a higher reading (~1.02) of the ratio indicates a bearish sentiment in the market.
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Readings. However, the ratio is considered to be a contrarian indicator, so that an extreme reading above 1.0 is actually a bullish signal and vice versa.
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Readings. The lowest level of the index was 0.39, set in March 2000 at the peak of the dot-com bubble.
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Calculation variants. The put/call ratio may be calculated using different sets of options data.
Clarity¶
A clear use of Put/Call Ratio names the carrier, the operative relation, and the conditions under which the source treats the identity as present. The minimal definition is In finance the put/call ratio (or put-call ratio, PCR) is a technical indicator demonstrating investor sentiment.
Manages Complexity¶
Put/Call Ratio compresses multiple formal models and representations details into a stable diagnostic relation. The source shows both the central mechanism—conversely, a higher reading (~1.02) of the ratio indicates a bearish sentiment in the market.—and the practical consequence—market-data providers commonly publish separate ratios for total options, equity options, index options, exchange-traded products, and individual products such as the VIX.
Abstract Reasoning¶
- Type the carrier. Identify the formal models and representations entities to which the claim applies.
- State the relation. Use the source-grounded identity: In finance the put/call ratio (or put-call ratio, PCR) is a technical indicator demonstrating investor sentiment.
- Check operation and conditions. However, the ratio is considered to be a contrarian indicator, so that an extreme reading above 1.0 is actually a bullish signal and vice versa.
- Demand recognition evidence.
Knowledge Transfer¶
Within the home domain. Knowledge about Put/Call Ratio transfers literally when a new case preserves the same carrier type, relation, and recognition test. Generally, a lower reading (~0.6) of the ratio reflects a bullish sentiment among investors as they buy more calls, anticipating an uptrend. Conversely, a higher reading (~1.02) of the ratio indicates a bearish sentiment in the market. Beyond the home domain. No canonical parent is asserted for Put/Call Ratio.
Relationships to Other Abstractions¶
Current abstraction Put/Call Ratio Domain-specific
Parents (1) — more general patterns this builds on
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Put/Call Ratio is a kind of Ratio Prime
The put-call ratio is the ratio of put activity to call activity used as a market-sentiment indicator.
Hierarchy path (1) — routes to 1 parentless root
- Put/Call Ratio → Ratio → Comparison → Self Checking
Neighborhood in Abstraction Space¶
Put/Call Ratio sits in a crowded region of the domain-specific corpus (38th percentile for distinctiveness): several abstractions share nearly its structure, so a description that fits it tends to fit its neighbors too.
Family — Financial Indices & Trading Indicators (15 abstractions)
Nearest neighbors
- Sterling Ratio — 0.90
- Market facilitation index — 0.88
- Merton's portfolio problem — 0.88
- Deleveraging — 0.88
- Value at risk — 0.88
Computed from structural-signature embeddings · 2026-10-08