IV Rank

What Is IV Rank?

IV Rank is a normalized measure of where a stock’s current implied volatility stands relative to its own 52-week range. Rather than reading IV as an isolated percentage, IV Rank provides context: an IV of 40% might be unusually low for a biotech that normally ranges 60-90%, or unusually high for a utility that typically ranges 15-25%.

The calculation: (Current IV - 52-week Low) / (52-week High - 52-week Low) × 100. An IV Rank of 100 means current IV is at its highest point of the past year. An IV Rank of 0 means it’s at its lowest. An IV Rank of 70 means current IV sits in the 70th percentile of its own 52-week range.

Example:

• 52-week IV low: 20%
• 52-week IV high: 80%
• Current IV: 50%
• IV Rank: (50 - 20) / (80 - 20) x 100 = 50

Why It Matters for Options Traders

IV Rank answers the practical question every options trader needs to ask before entering: are options expensive or cheap right now? A raw IV number in isolation is meaningless without knowing that underlying’s typical volatility range. IV Rank normalizes that comparison to a 0-100 scale that applies universally across all underlyings.

Options sellers use IV Rank as a primary entry signal. When IV Rank is above 50 (and especially above 70-80), premiums are elevated relative to recent history, and strategies like credit spreads, iron condors, and cash-secured puts may offer more favorable premium collection. When IV Rank is below 20, premiums are depressed, and option buying strategies become more attractive on a relative value basis.

IV Rank is particularly important when approaching earnings. A stock might always have high IV before earnings — IV Rank tracks whether this earnings cycle’s IV is high or low relative to previous earnings cycles. Traders use this to determine whether selling premium into earnings (expecting IV crush) or buying premium (expecting a bigger-than-priced move) is more strategically sound.

Key Considerations

• Formula: (Current IV - 52-week Low) / (52-week High - 52-week Low) x 100
• Scale: 0 to 100; above 50 generally considered elevated, above 80 considered high
• Limitation: A single very high or very low IV spike can distort the range and make IVR less informative — compare with IV Percentile for this reason
• Seller’s signal: High IVR (above 50) favors premium selling strategies; low IVR (below 20) favors premium buying
• Earnings context: Useful for comparing this cycle’s IV elevation against historical earnings periods
• Complement: Use alongside IV Percentile for a more complete picture of IV’s historical positioning