What the market really fears — term structure & skew
Implied volatility isn't one number. Spread it across expiries and it shows you when the market expects an event; spread it across strikes and it shows you which direction the market is afraid of. Term structure and skew are how you read fear itself.
- Term structure — how IV changes across expiries
- Contango, backwardation and flat — what each shape signals
- Picking your expiry, and where calendar spreads get an edge
- Skew — where the market pays up for fear
- Reading the volatility smile, and putting skew to work
Term structure — IV across time
Term structure is the shape of implied volatility across different expiration dates — how IV behaves for 7-day, 14-day, 30-day, 60-day, 90-day options and beyond. Line those up and the curve itself carries a message about when the market expects movement.
Three shapes cover almost everything you'll see. Contango (normal): longer expiries carry higher IV than short ones — the standard setup, more uncertainty over a longer horizon, a calm market. Backwardation (inverted): short expiries are more expensive than long ones — a signal of an imminent event (CPI, Fed, a halving, ETF news), usually followed by a front-end vol crush once the event passes. Flat: IV is similar across the curve — an ambiguous signal, so read other indicators.
What this means in practice
- Picking your expiry. If short expiries are pumped up by an event, buying short options means overpaying — better to buy longer-dated or wait for the post-event vol crush.
- Calendar spreads. When backwardation is strong, selling the short leg and buying the longer leg can carry an edge.
- Selling premium. In contango the front end has lower IV — less premium to collect — so mid-term expiries are often the sweet spot.
Skew — where the market pays for fear
Skew tells you whether the market pays more for puts (fear of the downside) or for calls (chasing the upside). It's one of the most underappreciated indicators in options analysis. The most common measure is 25-delta skew: take the IV of a −0.25-delta put and the IV of a +0.25-delta call — both OTM, roughly equidistant from spot — and compare them.
Skew = IV(25Δ put) − IV(25Δ call). Positive → puts are richer (downside fear); negative → calls are richer (upside greed).
How to read it
- Positive skew / puts more expensive → the market fears the downside. The typical setup in BTC and equities, because a crash is perceived as more likely than a melt-up.
- Negative skew / calls more expensive → euphoria and upside chasing — it happens at crypto bull-market extremes.
- Extremes are often contrarian. When puts are way more expensive than calls, the market has usually already priced in the fear, and a bounce is often near.
Putting skew to work
Skew has three practical uses. First, sentiment: rising put skew means fear, rising call skew means greed — and the third leg of a call-skew rally is often a warning of euphoria. Second, spotting overreach: skew violently tilted to the downside after a panic is a classic contrarian tell — "fear is priced in, the worst is behind us." Third, strategy selection: expensive puts are more attractive to sell (put credit spread, cash-secured put), and the same logic applies to expensive calls (call credit spread).
Platforms calculate skew differently — some normalize by ATM IV, some don't; some use 25Δ, others 10Δ. Before you build a thesis on "skew is +5," check exactly what that chart measures. What matters most isn't the absolute value, it's the trend (rising or falling) and the historical extremes.
Where this leads
You can now read all three faces of volatility: its level (IV and DVOL), its shape across time (term structure), and its shape across strikes (skew). That completes the volatility toolkit. From here the course turns to positioning and market mechanics — open interest, max pain, and how dealers actually push price around.
Free e-book · the whole thing Crypto Options — from your first call to your first edge This episode covers chapters 18–19. Read the complete e-book — free, no signup — for every chapter, diagram and worked example.
