Plan for the rise, skew and post-event reset of implied volatility around a company earnings announcement.
The pre-earnings build
Near-term IV often rises as the announcement approaches because one overnight move can dominate the expiration's risk. That premium is concentrated in expirations containing the event and may differ across puts and calls.
Expected move versus forecast
Option prices can be used to approximate the movement being priced, but that range is not a certainty. A trader needs the realized move and volatility change to compare favorably with the premium paid or risk accepted.
After the release
The event premium usually resets once results are public. Long-vega positions can suffer a crush; short-vega positions can benefit but face gap risk. Liquidity and spreads may also change at the open.
A practical example
A straddle costs $9 before earnings, reflecting substantial expected movement. A $5 stock move can still disappoint a long-premium buyer if IV falls sharply, while a $14 gap can overwhelm a premium seller.
This simplified example holds other inputs constant to isolate volatility exposure. Live option prices also reflect the underlying price, time decay, rates, dividends, liquidity and transaction costs. Greeks are theoretical estimates, not guarantees.
Frequently asked questions
Why is near-term IV high before earnings?
That expiration contains a concentrated company-specific uncertainty.
Is buying before earnings always expensive?
Premium often reflects the event, but relative value requires comparing price with plausible outcomes.
Can I isolate vega?
Not perfectly; delta, gamma, theta and execution all act together.
Continue the Vega & Volatility cluster
Explore related guides: Vega vs Theta in Options · What Is Vega in Options? · Vega in ITM, ATM and OTM Options. For a structured sequence, use the free Level 6 – Vega & Volatility course.
Options involve risk and are not suitable for every investor. This material is educational and is not investment, tax or legal advice. Greeks are theoretical estimates, and contract terms and broker requirements can vary.