What is Options Skew (Call vs Put IV)?
Options skew, also known as volatility skew or the volatility smile, refers to the pattern where implied volatility (IV) differs across strike prices for options with the same expiration date. In equity markets, out-of-the-money (OTM) puts typically carry higher implied volatility than equidistant OTM calls. This asymmetry is called put skew and reflects the market's willingness to pay a premium for downside protection.
The skew is quantified as the difference between the average IV of OTM puts and the average IV of OTM calls at equidistant strikes from the current stock price. A steep positive skew indicates that traders are paying more for puts relative to calls — a sign of elevated fear or hedging demand. Conversely, a flat or negative skew may suggest complacency or bullish sentiment.
How to Use This Options Skew Monitor
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Enter a Ticker Symbol
Type any optionable U.S. stock or ETF ticker (e.g., AAPL, SPY, TSLA) into the search box and click "Analyze Skew".
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Review Multi-Expiration Skew
The monitor fetches the options chain and calculates skew for each available expiration date. Compare near-term vs long-term skew to understand the term structure of volatility.
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Interpret the Skew Values
A positive skew means puts are more expensive than calls. Values above 5% indicate moderate fear; above 10% signals significant demand for downside hedging. Negative skew is rare and may indicate speculative call buying.
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Track Historical Changes
Each time you analyze a ticker, the skew reading is saved locally in your browser. View the history table to see how skew has changed over time for any ticker.
Why Monitor Options Skew?
Gauge Market Sentiment
Skew reveals what the options market is pricing in. Steep put skew signals fear; flat skew signals complacency.
Identify Trading Opportunities
Extreme skew levels can signal mean-reversion opportunities in options strategies like risk reversals and vertical spreads.
Track Changes Over Time
Historical skew data stored locally lets you spot trends and anticipate shifts in market positioning before they show up in price.
Understanding Risk Reversals and Skew
A risk reversal is an options strategy that involves simultaneously selling an OTM put and buying an OTM call (bullish risk reversal) or vice versa (bearish risk reversal). The cost of this strategy is directly tied to the volatility skew. When put skew is steep, the put you sell is relatively expensive compared to the call you buy, making bullish risk reversals cheaper. Traders use skew monitoring to time their risk reversal entries and identify when the market is pricing in excessive fear or complacency.
The skew also has implications for hedging costs. Portfolio managers who buy protective puts face higher costs when skew is steep. By monitoring skew levels and their historical context, you can make more informed decisions about when to hedge, when to sell premium, and how to structure your options positions for optimal risk-adjusted returns.