Options traders throw around "IVR" and "IVP" as if they mean the same thing. They do not. IV Rank and IV Percentile measure different things and using the wrong one biases your entries. AI Stock Monitor surfaces IV Rank as the primary metric on the Volatility page; this article explains why, and when IVP is the better lens.

Different Questions, Different Answers

IVR
IV Rank — position in the min/max range
"Where is today's IV between the lowest and highest IV in the lookback window?" Bounded by the period extremes — anchored on what this stock can reach when conditions are wildest.
IVP
IV Percentile — % of days below today
"On what fraction of the lookback days was IV lower than today's IV?" Pure frequency — anchored on what this stock typically does day-to-day, not on its extremes.

The Regime Where They Disagree

Imagine a stock that sat at 20-25% IV for 11 months, spiked to 80% for one earnings week, then drifted back to 22%. Today IV is 30%.

  • IVR ≈ 13%: 30% is close to the bottom of the 22-80% range. Options look cheap relative to what this stock has been able to reach.
  • IVP ≈ 85%: 30% is higher than almost every other day in the year. Options look rich relative to typical conditions.

Both are mathematically correct — they just answer different questions. IVR asks "how far up the extreme range?"; IVP asks "how unusual is today by frequency?"

IVR is the better default for option sellers on event-driven names, because the rare extreme weeks are exactly the windows where premium-selling pays. IVP is the better lens for income-focused dividend names, because typical-day calibration matters more than the once-a-year spike.

How AI Stock Monitor Surfaces These

The Volatility page lists every ticker on your watchlist with its current IV alongside an IV Rank column — that is the canonical metric the system sorts and colour-codes by. The methodology section on the same page explains the IV-Rank calculation in detail, so you can validate it against external services that may publish slightly different numbers.

IV Percentile is not currently surfaced as a per-ticker column. If your strategy specifically needs IVP-style typical-day calibration, the IV-history chart on each ticker's data page lets you read it visually — current IV plotted against the past year's distribution.

IVR = position in 52-week min/max range · the app default
IVP = % of days below today · supplements IVR for typical-day reads
Volatility page sorts by IVR · IVP read off the per-ticker IV-history chart

Open the Volatility page →