IV Rank Explained: Are Options Cheap or Expensive Right Now?

What implied volatility (IV) actually is

Implied volatility is the market's estimate of how much a stock might move, baked into its option prices. Higher IV means richer premiums — but a raw IV number is almost useless on its own. A 40% IV is low for a biotech and sky-high for a utility. You need context.

What IV Rank measures

IV Rank puts today's implied volatility in the context of that same stock's last 52 weeks, on a 0–100 scale:

• IV Rank 0 — today's IV is the lowest it's been all year.
• IV Rank 100 — today's IV is the highest it's been all year.
• IV Rank 50 — IV sits right in the middle of its yearly range.

The formula is just (current IV − 52-week low) ÷ (52-week high − 52-week low) × 100. Because it's measured against the stock's own history, an IV Rank of 70 means the same thing for a utility and a biotech: options are expensive relative to how this stock normally trades.

IV Rank vs IV Percentile

People mix these up. IV Rank is based on the high–low range. IV Percentile is the percentage of days in the last year that IV was below today's level. They usually agree, but IV Percentile is less sensitive to a single volatility spike skewing the range. TickerRisk shows both.

Why premium sellers care

Selling options is broadly a bet that implied volatility is overpriced and will fall. That bet has the best odds when IV is high relative to its own history — high IV Rank — because you collect more premium, and elevated IV tends to revert back toward its average ("IV crush"), which benefits short option positions. Buying options is the opposite: you generally want low IV Rank so you're not overpaying for volatility.

How to read it (rough guide)

• Above ~70 — options expensive; favourable for selling premium (credit spreads, cash-secured puts, covered calls).
• 30–70 — middling; no strong volatility edge either way.
• Below ~30 — options cheap; better for buyers than sellers.

The mistake that costs people money

High IV Rank is necessary but not sufficient. Volatility is often high for a reason — an earnings report, an FDA decision, a lawsuit. That's not free money; it's the market pricing in real event risk. A high IV Rank sitting on top of a binary catalyst can crush you even as IV moves in your favour, because the stock gaps. Always check why IV is elevated before selling into it — which is exactly why TickerRisk pairs IV Rank with a risk score and an events calendar.

See it live

TickerRisk computes IV Rank for the full S&P 500 and updates it through the day. Sort the whole market by it on the highest IV Rank screener, or check one name on the options page.