ACOG · IV Rank History
Alpha Cognition Inc. Common Stock
IV rank shows where ACOG's implied volatility sits within its own recent range: 0 is the lowest reading in the window, 100 the highest. This page gives the 52-week version, the 90-session version our screeners use, the IV percentile, and the daily history.
ACOG's 30-day at-the-money implied volatility was 270.3% as of Nov 11, 2026. On the 90-session window our screeners use, the IV rank is 100.
ACOG IV rank history
20 sessionsFilled line: 90-session IV rank (0–100, left axis). Dashed line: 30-day at-the-money implied volatility (right axis).
ACOG IV rank and implied volatility as of 2026-11-11
How these are measured. Implied volatility here is ACOG's 30-day at-the-money IV: the implied volatility of the calls and puts struck nearest the share price, blended between the expirations on either side of 30 days so every reading covers the same horizon. It's the IV level options traders usually quote, and it doesn't jump when the nearest expiration rolls from a weekly to a monthly. The 7-day figure is the same measure a week out, so it reacts first to near-term events such as earnings.
52-week IV rank = (today's IV − 52-week low) ÷ (52-week high − 52-week low) × 100. IV percentile is the share of the past year's sessions that closed with lower IV than today. The 90-session IV rank applies the same rank formula to the last 90 sessions, so it reacts faster; there isn't a full year of history for ACOG yet, so only the 90-session measures are shown.
A high reading means ACOG options are expensive relative to their own recent history, which is common ahead of earnings or after a sharp move. It says nothing about which way the stock will go. The Vol Arb Screener ranks every tracked symbol by these measures.
ACOG implied volatility by month
| Month | Avg ATM IV | High | Low | Avg IV Rank (90-session) |
|---|---|---|---|---|
| Nov 2026 (to date) | 194.8% | 270.3% | 112.4% | 100 |
| Oct 2026 | 110.9% | 220.9% | 63.1% | — |
ACOG IV rank: last 20 sessions
| Date | IV Rank (90-session) | 30-Day ATM IV | 7-Day ATM IV |
|---|---|---|---|
| 2026-11-11 | 100 | 270.3% | 270.3% |
| 2026-11-09 | — | 199.6% | 258.0% |
| 2026-11-06 | — | 159.8% | 159.8% |
| 2026-11-05 | — | 260.4% | 260.4% |
| 2026-11-04 | — | 155.6% | 237.3% |
| 2026-11-03 | — | 112.4% | 112.4% |
| 2026-11-02 | — | 205.4% | 205.4% |
| 2026-10-30 | — | 70.3% | — |
| 2026-10-29 | — | 69.3% | — |
| 2026-10-28 | — | 103.6% | — |
| 2026-10-27 | — | 179.4% | — |
| 2026-10-26 | — | 84.5% | — |
| 2026-10-23 | — | 81.9% | — |
| 2026-10-21 | — | 165.4% | — |
| 2026-10-20 | — | 91.5% | — |
| 2026-10-19 | — | 63.1% | — |
| 2026-10-16 | — | 82.9% | — |
| 2026-10-15 | — | 105.8% | — |
| 2026-10-14 | — | 123.2% | 320.4% |
| 2026-10-13 | — | 220.9% | 394.1% |
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