Learn › Volatility & the Greeks · Jun 2026 · 2 min read
What Does IV Mean in Options? (Implied Volatility)
Implied volatility is the biggest input into an option's price that isn't the stock price itself. Understand it, and option prices stop looking random.
The one-line version
Implied volatility (IV) is the market's estimate of how much a stock will move over the life of an option, expressed as an annualised percentage. High IV means the market expects big swings; low IV means it expects calm. It's a forecast of magnitude, not direction.
Why it's called "implied"
Nobody publishes IV directly — it's reverse-engineered from the option's price. Traders see what people are paying for an option, run that through a pricing model, and back out the volatility number that would justify the price. So IV is just the market's collective bet, baked into what buyers and sellers agree on.
High IV vs low IV
- High IV → expensive options. Premiums are fat. Great for selling (you collect more), punishing for buying (you overpay).
- Low IV → cheap options. Premiums are thin. Good for buying, poor for selling.
Why sellers care about IV more than direction
If you're selling a cash-secured put or covered call, your income is the premium — and the premium is mostly driven by IV. Two stocks at the same price can pay wildly different premiums purely because one has higher IV. That's why premium sellers hunt for elevated IV, not for stocks they think will rise.
The catch: IV isn't free money
High IV exists for a reason. The market usually prices in extra volatility before a known event — most famously earnings. The premium looks juicy, but it's compensation for risk, and once the event passes IV collapses (see IV crush). A fat premium is a flag to investigate, not an automatic green light.
How do you know if IV is "high"?
A raw IV number (say 40%) means little on its own — 40% is low for a biotech and sky-high for a utility. You need it relative to that stock's own history, which is exactly what IV Rank does: it tells you where today's IV sits within the last year's range, on a 0–100 scale.
How TickerRisk helps
Every TickerRisk scan shows the stock's IV%, its IV Rank, and how that IV compares to how much the stock has actually moved — so you can tell whether options are genuinely rich or just nominally high. The high IV-Rank screener ranks the whole S&P 500 for premium sellers. Scan any ticker free.
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