Many traders encounter IV crush in a familiar way.

A call option is bought ahead of earnings. The company reports solid numbers. The stock rises. Yet the option does not perform as expected.

At first glance, this feels inconsistent. The direction was correct, but the outcome was disappointing.

The missing piece is that the position was exposed to more than just direction.

Simple explanation

When trading shares, the relationship is straightforward. Price goes up, the position gains. Price goes down, it loses.

Options introduce an additional layer. Part of the option price reflects how uncertain the market expects the future to be before expiry. This is referred to as implied volatility.

Ahead of scheduled events such as earnings or central bank decisions, this uncertainty is often elevated. After the event, once the unknown becomes known, that uncertainty is reduced.

This reduction in uncertainty pricing is what traders refer to as IV crush.
Mini-summary: options price both direction and uncertainty, and both can change.

Real-world example

Consider a stock trading at 100 ahead of earnings.
A trader buys a short-dated call option for 5, expecting a positive move.
After earnings, the stock rises to 105.
However, the option is now worth only 4.

This outcome can feel counterintuitive. The direction was correct, yet the position lost value.

What changed is not only the stock price, but the pricing of uncertainty. Part of the option’s value was tied to the anticipation of the event. Once the event passed, that component was reduced.
Mini-summary: being right on direction is not always sufficient for option PnL.

From risk to structure

Different option structures carry different exposure to uncertainty.

A standalone call option is fully exposed to both direction and changes in uncertainty.
A spread, by contrast, combines a long and a short option. This means that part of the change in uncertainty is offset within the structure itself.

The result is a more balanced exposure. The trade becomes less sensitive to changes in uncertainty and more focused on direction within defined limits.
Mini-summary: structure determines how much uncertainty exposure is carried.

The event uncertainty lifecycle

Before an event, uncertainty is often priced at a higher level because outcomes are unknown.
After the event, once new information is released, that uncertainty is reduced. Option prices adjust accordingly.

This pattern is common, but not guaranteed. If new uncertainty is introduced, pricing may remain elevated.
Mini-summary: IV crush is typical, but not automatic.

When IV crush matters most

The impact of IV crush depends on context.

It tends to matter most when:

• The position uses short-dated options
• The trade is held through a known event
• The strikes are near the current price

It matters less when trading the underlying directly, or when using longer-dated options where a single event represents a smaller portion of total uncertainty.
Mini-summary: the shorter the timeframe and the closer the event, the greater the impact.

Practical interpretation

This leads to a broader perspective.

Options are not simply a leveraged way to express direction. They are a way to express a view on both direction and uncertainty.
Understanding IV crush helps explain why outcomes can differ from expectations, and why structure plays a key role in shaping those outcomes.

It shifts the focus from prediction to understanding how positions behave under different conditions.

Optional deeper insight

Option pricing reflects multiple components, including direction and the market’s expectations of variability.

Standalone options are directly exposed to both. Spreads partially offset these components, which can lead to more stable behaviour around events.

This is not inherently better or worse. It is a different exposure profile.

FAQ

• Why did my option lose value even though the stock moved in my favour?
  Because part of the option’s value was tied to uncertainty, which decreased after the event.
• What is implied volatility in simple terms?
  It is how much movement the market expects before the option expires.
• Is IV crush always guaranteed after earnings?
  No. It is common, but outcomes depend on how uncertainty evolves after the event.
• Do spreads avoid IV crush completely?
  No. They tend to reduce exposure, but do not eliminate it.
• When should I care about IV crush most?
  When trading short-dated options around major events.