What is IV rank?

IV rank is one of the most useful tools in an options trader's toolkit. It tells you whether implied volatility for a specific stock is high or low relative to its own history, giving you the context you need to decide whether to buy or sell options premium.

Without IV rank, a raw IV number means very little. Knowing that AAPL's IV is 28% tells you nothing on its own. Knowing that 28% represents an IV rank of 75, meaning IV is higher than 75% of its range over the past year, tells you options are relatively expensive and selling premium may be advantageous.

How IV rank is calculated

IV rank compares today's implied volatility to the highest and lowest IV readings over the past 52 weeks:

IV Rank = (Current IV − 52-week IV low) / (52-week IV high − 52-week IV low) × 100

The result is a score from 0 to 100:

• 0 = IV is at its 52-week low
• 100 = IV is at its 52-week high
• 50 = IV sits exactly in the middle of the annual range

A practical example

AAPL's IV over the past year has ranged from a low of 18% to a high of 60%. Current IV is 46%.

IV Rank = (46 − 18) / (60 − 18) × 100 = 67

Options are relatively expensive, IV is in the upper third of its annual range. This is a favorable environment for selling premium.

How to use IV rank in trading decisions

IV rank above 50, consider selling premium

Options are expensive relative to recent history. Strategies that benefit from elevated IV and subsequent IV decline: iron condors, covered calls, cash-secured puts, short strangles, credit spreads.

IV rank below 30, consider buying premium

Options are cheap relative to recent history. Strategies that benefit from low IV and potential IV expansion: long calls, long puts, debit spreads, calendar spreads.

IV rank between 30 and 50, neutral zone

No strong edge in either direction. Be more selective about strategy choice.

IV rank vs IV percentile

IV rank and IV percentile are related but different:

• IV rank compares current IV to the 52-week high and low
• IV percentile counts the percentage of trading days over the past year where IV was lower than today

IV rank is more intuitive and faster to interpret. IV percentile is more statistically robust, particularly for tickers that have had extreme one-off IV spikes (like a single earnings blowout that inflated the 52-week high).

Example: If TSLA had one massive IV spike to 120% during a short squeeze last year, its 52-week IV high is 120%. Current IV of 55% might show an IV rank of 30 (looks cheap) but an IV percentile of 70 (actually elevated on most days). In this case, IV percentile gives a more accurate picture.

IV rank across different tickers

Different stocks have structurally different IV profiles. A biotech stock might have a "normal" IV of 60%, while a utility stock might have a "normal" IV of 12%. IV rank normalizes these differences, a rank of 70 means the same thing whether you're looking at a volatile biotech or a stable blue-chip.

This makes IV rank invaluable for screening across a universe of stocks to find the best premium-selling opportunities at any given time.

Common mistakes with IV rank

Mistake 1: Treating IV rank as a timing signal in isolation. High IV rank means options are expensive, it doesn't mean IV will fall immediately. IV can stay elevated or rise further, particularly into earnings or macro events. IV rank should be one input, not the only input.

Mistake 2: Ignoring the catalyst. If IV rank is high because earnings are in two days, the IV will likely crush after the announcement. That's expected, not necessarily an edge. Look for high IV rank without an obvious near-term catalyst for the cleanest trades.

Mistake 3: Using IV rank on illiquid tickers. IV rank is most reliable on liquid underlyings with deep options chains (SPY, QQQ, large-cap stocks). On thinly traded names, IV data can be noisy and misleading.

Related terms: IV percentile, implied volatility, IV crush, Vega, historical volatility

Try it on Stryke: Screen every ticker by IV rank in real time using the Options Screener. Sort by IV rank to find the highest-premium selling opportunities in your universe.