CSFB / Zweig Fear Barometer
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Definition
A zero-cost-collar-based sentiment gauge that measures the cost of hedging by comparing demand for out-of-the-money S&P 500 puts against out-of-the-money calls. Higher readings signal greater fear.
How to read it
The barometer expresses fear through option positioning: it finds the strike of an OTM call that can be sold to finance the purchase of a fixed OTM put (a zero-cost collar). The further out that call strike has to be, the more expensive downside protection is relative to upside — i.e., the more investors fear a decline. Rising readings mean puts are bid up versus calls (defensive/fearful positioning); low readings mean cheap protection and complacency. Like other sentiment tools it is read for extremes and contrarian context rather than as a precise timer.
How practitioners use it
Used as context among multiple indicators — never as a standalone signal to act.
Less common professional uses
Because it is a positioning-cost measure, extreme highs can mark capitulation in hedging demand — a contrarian bullish tell when it reverses down. Divergence with price: barometer making new highs while the index is only modestly off its highs suggests hedgers are unusually anxious relative to price action. It reflects relative put/call skew, so it can rise even in a flat market if call demand collapses — verify the driver before concluding 'fear.'
Sources & provenance
Zweig/CSFB Fear Barometer methodology (educational overview); Portal desk education notes
This page is educational content published by Pachira Aquatica Global LLC. It is not investment advice and not a recommendation.