DBX · IV Rank History

Dropbox, Inc. Class A

IV rank shows where DBX'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.

DBX's 30-day at-the-money implied volatility was 43.2% as of Oct 26, 2026. Its 52-week IV rank is 61 and its IV percentile is 72%: IV was lower on 72% of the past year's sessions. Over those 52 weeks it ranged from 18.9% (Nov 14, 2025) to 58.8% (Nov 5, 2025). On the 90-session window our screeners use, the IV rank is 51.

DBX IV rank history

504 sessions

Filled line: 90-session IV rank (0–100, left axis). Dashed line: 30-day at-the-money implied volatility (right axis).

DBX IV rank and implied volatility as of 2026-10-26

52-Week IV Rank
61
0 = year low, 100 = year high
IV Percentile
72%
of past-year sessions had lower IV
90-Session IV Rank
51
used by our screeners
30-Day ATM IV
43.2%
1-year average 38.5%
7-Day ATM IV
62.2%
90-session rank 66
52-Week IV High
58.8%
2025-11-05
52-Week IV Low
18.9%
2025-11-14
History Since
2023-05-02
848 sessions

How these are measured. Implied volatility here is DBX'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.

A high reading means DBX 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.

DBX implied volatility by month

MonthAvg ATM IVHighLowAvg IV Rank (90-session)
Oct 2026 (to date) 44.3% 48.4% 39.5% 55
Sep 2026 37.5% 41.9% 33.4% 30
Aug 2026 38.8% 52.8% 29.0% 32
Jul 2026 43.1% 56.9% 32.8% 50
Jun 2026 37.2% 44.8% 31.1% 28
May 2026 39.5% 56.7% 32.8% 40
Apr 2026 44.0% 55.5% 36.0% 67
Mar 2026 34.0% 45.2% 29.5% 40
Feb 2026 41.5% 53.2% 32.0% 56
Jan 2026 36.0% 48.1% 28.5% 42
Dec 2025 31.2% 41.1% 24.9% 31
Nov 2025 34.5% 58.8% 18.9% 35
Oct 2025 41.7% 59.1% 30.7% 58
Sep 2025 27.7% 34.0% 25.4% 23
Aug 2025 31.2% 49.9% 24.4% 25
Jul 2025 41.0% 48.0% 28.8% 42
Jun 2025 31.9% 45.6% 20.9% 22
May 2025 31.9% 48.4% 23.6% 17
Apr 2025 47.9% 68.1% 30.9% 58
Mar 2025 33.3% 58.7% 26.6% 29
Feb 2025 38.3% 45.4% 26.6% 44
Jan 2025 34.4% 57.3% 25.1% 37
Dec 2024 31.4% 51.1% 23.0% 19
Nov 2024 31.1% 47.6% 24.1% 15
Oct 2024 37.3% 45.6% 27.5% 27
Sep 2024 29.1% 35.9% 24.7% 13
Aug 2024 37.1% 75.6% 23.2% 30
Jul 2024 40.8% 52.3% 30.0% 41
Jun 2024 27.0% 32.3% 23.0% 11
May 2024 36.7% 67.4% 22.2% 49
Apr 2024 39.2% 44.3% 29.5% 88
Mar 2024 27.2% 32.6% 24.0% 30
Feb 2024 32.7% 39.9% 26.5% 66
Jan 2024 28.9% 33.9% 22.8% 48
Dec 2023 23.0% 24.1% 21.7% 12
Nov 2023 23.8% 37.0% 21.7% 16
Oct 2023 34.7% 37.2% 31.2% 87
Sep 2023 23.3% 26.9% 21.2% 15
Aug 2023 26.3% 36.6% 21.4% 29
Jul 2023 33.0% 35.3% 29.9% 65
Jun 2023 23.6% 25.8% 20.9% 12
May 2023 27.3% 39.4% 23.6% 14

DBX IV rank: last 30 sessions

DateIV Rank (90-session)30-Day ATM IV7-Day ATM IV
2026-10-26 51 43.2% 62.2%
2026-10-23 51 43.3% 45.1%
2026-10-22 70 48.4% 38.9%
2026-10-21 51 43.3% 49.7%
2026-10-20 57 44.9% 35.9%
2026-10-19 61 46.0% 52.1%
2026-10-16 58 45.1% 29.3%
2026-10-15 57 45.0% 40.1%
2026-10-14 48 42.5% 44.9%
2026-10-13 60 45.8% 39.1%
2026-10-12 54 44.1% 44.1%
2026-10-09 59 45.6% 37.0%
2026-10-08 59 45.6% 40.2%
2026-10-07 54 44.1% 36.8%
2026-10-06 50 43.0% 39.2%
2026-10-05 38 39.5% 38.6%
2026-10-02 63 46.7% 47.5%
2026-10-01 46 41.9% 38.6%
2026-09-30 33 38.3% 40.6%
2026-09-29 42 40.8% 35.6%
2026-09-28 46 41.9% 46.5%
2026-09-25 39 39.8% 40.0%
2026-09-24 40 40.1% 46.1%
2026-09-23 35 38.7% 48.8%
2026-09-22 37 39.4% 41.3%
2026-09-21 33 38.2% 44.6%
2026-09-18 37 39.3% 45.2%
2026-09-17 23 35.6% 37.4%
2026-09-16 39 40.0% 40.7%
2026-09-15 16 33.4% 39.8%

Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.