Implied Volatility & Trading Around Earnings

Summary

Implied volatility is a model-implied input derived from option prices, with limits as a forecast of realised volatility.

What implied volatility actually is

Implied volatility (IV) is the volatility figure that, plugged into an option pricing model, would produce the option's current market price. It is not a prediction any single person makes — it emerges from the aggregate bids and offers of every participant. Changes can reflect expected uncertainty, demand for protection and risk premiums. IV is model-dependent and need not equal later realised volatility.

IV rank vs IV percentile

The raw IV number is meaningless without context. IV rank compares today's IV to the highest and lowest reading of the last 12 months on a 0-100 scale. IV percentile tells you what fraction of the last year the stock traded below today's IV. Neither an IV-rank threshold nor an IV-percentile threshold establishes a buy or sell rule. Compare the chosen lookback, option expiry, price source and costs before interpreting either measure.

The earnings trap

Implied volatility often rises before earnings and can fall sharply afterwards. A trader can be directionally correct and still lose on a long option if the volatility drop and time decay outweigh the price move.

Comparing hypothetical earnings payoffs

In a paper worksheet, compare hypothetical long-premium and defined-risk premium-selling structures around earnings to see how direction, implied volatility and the size of the actual move interact. TradeHQ does not price these structures. Avoid treating volatility selling as inherently safer; short premium can carry substantial risk.

Practice loop

For a historical study, record dated option quotes and implied-volatility observations from an options-data source before and after an earnings announcement. Keep the expiry, strike and data methodology consistent, and record price changes as well as volatility changes. TradeHQ does not supply an options chain or IV-rank data. A small sample can illustrate mechanisms without establishing a reliable trading edge.

(Educational only — not financial advice. TradeHQ offers $100,000 virtual cash for supported spot instruments. Options contracts, Greeks, futures margin and settlement are conceptual exercises; the simulator does not execute them.)

Key takeaways

• IV is inferred from option prices under a model; it can differ from future realised volatility.
• IV rank contextualises today's IV against the last 12 months.
• IV crush after earnings can turn a correct directional bet into a loss.
• Elevated implied volatility changes the payoff profile of premium-selling strategies, but higher premiums also reflect higher expected uncertainty and risk.

Check your understanding

• IV rank of 80 means: Options: IV is at 80%; IV is near a 12-month high; IV is near a 12-month low; 80% of options are profitable. Correct answer: IV is near a 12-month high. Why: IV rank normalises IV against the last year on a 0-100 scale.
• Why can a long option lose even if the price moves in the expected direction after earnings? Options: Because options never follow the underlying; A drop in implied volatility and time value can offset the directional gain; Because earnings cancel the contract; Because all options are illiquid. Correct answer: A drop in implied volatility and time value can offset the directional gain. Why: Option value depends on more than direction; implied volatility and time value can change sharply after earnings.
• What does a high IV rank tell you? Options: A premium-selling trade is guaranteed to work; Current implied volatility is high relative to its own recent range; The stock must fall; The next move will be small. Correct answer: Current implied volatility is high relative to its own recent range. Why: IV rank is context about relative option pricing, not a standalone buy or sell signal.
• Implied volatility is: Options: Historical vol over 30 days; An exchange forecast; The volatility that makes model = market price; The stock's beta. Correct answer: The volatility that makes model = market price. Why: IV is the vol input that reconciles a pricing model with the live option price.

Sources

• OIC — Vega and implied volatility sensitivity (https://www.optionseducation.org/advancedconcepts/vega)
• OIC — IV rank and percentile definitions (https://www.optionseducation.org/news/june-office-hours-faqs-iv-statistics-position-management-and-the-wheel-strategy)

Practise this lesson

Use $100,000 in virtual cash to practise supported spot instruments and general habits such as recording a trade thesis. Options contracts, Greeks, futures margin and daily settlement are conceptual exercises: calculate their examples in a worksheet, because TradeHQ does not execute derivatives contracts. Educational simulation only — not financial advice.