What Is IV Rank in Options Trading?
Disclaimer: All ticker prices, premiums, and return calculations shown are examples for educational purposes and reflect market conditions at the time of writing. They are not trade recommendations. Options trading involves significant risk of loss. Past performance of any strategy does not guarantee future results. Consult a licensed financial professional before trading.
CHWY has an IV of 72.9%. UPST has an IV of 78.2%. Which one has better premium-selling conditions? You can't tell from IV alone — you need IV Rank. A stock that normally trades at 80% IV isn't "elevated" at 78%. A stock that normally trades at 30% IV is screaming at 45%. IV Rank tells you where current volatility sits relative to the stock's own history, and it's the single most important filter for selling options.
IV Rank vs. Implied Volatility — Why Raw IV Is Misleading
Implied volatility tells you how expensive options are right now. IV Rank tells you whether that's expensive relative to normal.
Tesla options might trade at 55% IV on a quiet day. Meta might trade at 30%. Does that mean Tesla options are more expensive? Not necessarily — Tesla always has high IV. What matters is whether today's IV is high or low for that specific stock.
IV Rank solves this by expressing current IV as a percentage of its 52-week range. If a stock's IV ranged from 30% to 80% over the past year and it's currently at 55%, its IV Rank is 50% — right in the middle. Nothing special. But if its range was 20% to 40% and it's currently at 38%, IV Rank is 90% — premium is rich relative to history.
How IV Rank Is Calculated
The formula is simple:
IV Rank = (Current IV - 52-Week IV Low) / (52-Week IV High - 52-Week IV Low) × 100
Example: CHWY's IV ranged from 40% to 95% over the past year. Current IV is 72.9%.
IV Rank = (72.9 - 40) / (95 - 40) × 100 = 59.8%
That's moderate — above average but not extreme. Compare to UPST at 78.2% IV with a range of 50-120%: IV Rank = (78.2 - 50) / (120 - 50) × 100 = 40.3%. Despite UPST having higher raw IV, CHWY actually has the better IV Rank for premium selling. This is why raw IV is misleading.
What IV Rank Numbers Mean for Traders
0-20 IV Rank: Volatility is near 52-week lows. Options are cheap. Bad time to sell premium — you're not getting paid enough for the risk. Consider buying strategies instead.
20-40 IV Rank: Below average. Marginal for selling unless the stock has other strong signals (great entry timing, institutional accumulation).
40-60 IV Rank: Average to slightly elevated. Acceptable for selling if other factors align. Most of the time, most stocks live here.
60-80 IV Rank: Elevated. Good premium-selling territory. Options are notably more expensive than usual. This is where most of my put sales happen.
80-100 IV Rank: Extreme. Premium is very rich — but ask why. Often it's because earnings are imminent or there's a known catalyst. Selling into 90+ IV Rank can be extremely profitable if the catalyst doesn't blow up the stock, but the risk is real.
IV Rank in Practice: Reading the Scanner
On our put premium scanner, CHWY shows 72.9% IV with an IV Rank display. SOFI shows 63.7%. DXCM shows 44.5%. NKE shows 52.9%.
I sort by the composite score, which weights IV Rank at 28% — the single largest factor. A stock with a Grade A setup almost always has IV Rank above 50. Grade B is usually 35-60. Below 30, the scanner typically won't surface it because the premium isn't worth your capital.
The IV/HV ratio matters too. If IV is 72.9% but historical (realized) volatility is 75%, options are actually underpriced — the market is charging less than the stock actually moves. I want IV/HV above 1.2 to confirm I'm selling expensive vol, not cheap vol. CHWY's IV/HV of 1.57 is excellent.
IV Rank and Theta Decay: The Combined Edge
Selling options when IV Rank is high gives you two edges working simultaneously. First, you collect more premium because options are expensive. Second, if IV drops back toward its average (which it usually does), you profit from the IV contraction on top of the theta decay.
This is called the "volatility risk premium" — implied volatility systematically overstates actual stock movement. When IV Rank is high, this overstatement is largest, meaning sellers capture more excess premium. Academic research consistently shows this premium exists across markets and time periods. It's the structural edge behind every premium-selling strategy.
Key Takeaways
Related Research & Tools
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Flow Proof calculates IV Rank daily for every stock in your watchlist and weights it at 28% of the composite setup score — the single largest factor.
Start Free Trial →Frequently Asked Questions
Is IV Rank the same as IV Percentile?
No. IV Rank uses the 52-week high/low range. IV Percentile counts the percentage of days in the past year that IV was below the current level. They often give similar signals but can diverge. IV Rank is more commonly used by premium sellers because it's simpler and reacts faster to IV spikes.
What's a good IV Rank for selling puts?
Most experienced sellers target IV Rank above 40, with 60+ being ideal. Below 30, the premium usually isn't worth the capital commitment. The scanner surfaces the best setups by combining IV Rank with entry timing, trend position, and liquidity.
Does IV Rank predict stock direction?
No. IV Rank tells you whether options are expensive or cheap, not where the stock is going. A stock can have 90 IV Rank and still go up. The edge for sellers is that high IV tends to overstate the actual move — you profit from the volatility contracting back to normal, regardless of direction.