What is volatility skew?

Volatility skew is the pattern where options at different strikes carry different implied volatilities. In most stocks, lower-strike puts have higher implied volatility than higher-strike calls. Plotted across strikes, IV slopes downward from puts to calls, a tilt traders call the skew or the smirk.

Why do puts have higher implied volatility than calls?

Because investors fear a crash more than they fear missing a rise. Downside protection is in constant demand, and markets tend to fall faster than they rise, so puts are bid up. That extra demand shows up as higher implied volatility on the downside strikes.

What does the skew tell you?

It tells you how much the market is paying for downside protection relative to upside speculation. A steep skew means heavy fear and expensive puts. It is a read on sentiment, priced directly into the option chain.

How do you trade volatility skew?

Skew makes downside puts richer, which rewards strategies that sell them, like cash-secured puts and put credit spreads. It also makes buying downside protection expensive. Traders use the skew to sell the pricey side and avoid overpaying for the expensive one.

Volatility Skew in Practice

What you'll learn in this lesson

What volatility skew is and how to read it across strikes
Why downside puts carry higher implied volatility than upside calls
What the skew reveals about market fear
How the skew quietly rewards put sellers

Throughout this course, we kept the math clean by treating puts and calls as mirror images: the $190 put and the $210 call, both $10 from the price, both priced at $1.30. That symmetry made everything easier to learn. It is also a small white lie.

In the real world, those two are not equal. The downside put almost always costs more than its upside twin. Markets price fear, and fear lives on the downside. That tilt has a name, the volatility skew, and now that you have the foundations, it is time to meet the chain as it truly is.

Fear Costs More Than Hope

Implied volatility, the IV from the last lesson, is not one number for a stock. It is a different number at every strike. And in most stocks, the pattern is consistent: lower strikes, the downside puts, carry higher IV than higher strikes, the upside calls.

Why? Because people fear a crash more than they fear missing a rise. Investors constantly want downside protection, so they bid up puts. And stocks tend to fall faster and harder than they climb, so a sharp drop is genuinely more likely than an equally sharp jump. Both forces push downside IV up. Plot IV across the strikes and it slopes down from puts to calls, a shape traders call the smirk.

Implied volatility across strikes

Downside protection costs more, so put IV runs higher than call IV. That tilt is the skew.

The Mirror Was Never Exact

Now we can correct the small lie. Our tidy chain said the $190 put and the $210 call, equal distances from $200, both cost $1.30. Skew says the downside put is actually worth a bit more, because its implied volatility is higher. The put is pricing in extra fear that the call does not.

It is not a huge gap on a calm stock, but it is always there, and it always leans the same way. The further out of the money a put is, the more this shows up, which is why deep crash-protection puts can look surprisingly expensive for how unlikely they seem. You are not just paying for the odds of the move. You are paying for everyone else's fear of it.

Simple model

Real market (skew)

Downside put IV

24%

Higher, near 32%

Upside call IV

24%

Lower, near 20%

Which side is richer

Equal

The downside put

The mirror was a teaching tool. The real chain always leans toward pricier puts.

Reading the Skew as Sentiment

Because the skew is fear made visible, its steepness tells you something real. When the smirk is steep, with downside IV towering over upside IV, the market is paying heavily for protection: nerves are high. When the skew flattens, fear has eased and protection is cheaper relative to upside.

Skew also steepens before and during scary periods and relaxes when calm returns. So beyond any single trade, the shape of the skew is a sentiment gauge. A glance at how tilted the chain is tells you how worried the market really is, in a way the headline IV number alone does not.

How the Skew Rewards Put Sellers

Here is the practical payoff, and it ties straight back to the income engine you started this course with. Because downside puts carry richer IV, selling them pays better. The cash-secured put, the put credit spread, the put side of a strangle, all of them collect extra premium thanks to the skew. You are being paid for the market's fear.

The flip side: buying that downside protection is expensive, which is the cost you weigh when hedging. The skilled move is to lean toward selling the pricey, fear-soaked side and avoid overpaying for it as a buyer. Skew is not an obstacle. For a premium seller, it is a tailwind.

When I was advising clients, I would point at the skew and say, that tilt is everyone else's fear, and you can either pay it or collect it. Selling puts on stocks we were happy to own meant we were collecting it, month after month.

Use the skew to

Collect the richer premium on downside puts you sell
Read its steepness as a gauge of market fear
Favor selling the pricey side over buying it

Do not

Assume puts and calls are priced as equal mirrors
Overpay for downside protection without noticing the cost
Ignore how steep or flat the skew has become

Key Takeaways

Volatility skew is the pattern of different IV at different strikes.
Downside puts carry higher IV than upside calls, because fear costs more than hope.
The tidy mirror was a teaching tool; the real chain always leans toward richer puts.
The skew's steepness is a fear gauge: steep means nervous, flat means calm.
The skew rewards put sellers with extra premium and makes downside protection costly.

Pop Quiz

Three quick questions to lock it in. Pick an answer and the explanation shows up right away.

In a typical stock, which strikes carry the higher implied volatility?

Downside puts carry higher IV. Investors fear crashes and bid up protection, so the skew slopes down from puts to calls.

Why do downside puts carry higher implied volatility?

Constant demand for downside protection, plus the fact that stocks tend to fall faster than they climb, pushes put IV above call IV. The skew is fear, priced.

How does the skew help a premium seller?

Because downside puts carry richer IV, selling them, through cash-secured puts or put spreads, collects extra premium. You get paid for the market's fear.

Bottom Line

The volatility skew is the chain telling the truth about fear. Downside puts cost more than upside calls because protection is always in demand and crashes come fast. That tilt makes the tidy mirror a small fiction, turns the skew's steepness into a sentiment gauge, and quietly pays the put seller a premium for carrying everyone else's worry. Read the skew, and you read the market's nerves right off the option chain.

The skew is fear, priced into the chain

Buy downside protection

You pay the fear premium baked into the puts

Sell downside puts

You collect that fear premium, month after month

Everyone else's fear is a price. You can pay it or collect it.

Next up: LEAPS. We have lived in the world of short-dated options. Next we go long, way out to options that expire a year or two from now, and see how they can stand in for stock and supercharge the covered call.