DNTH · IV Rank History

Dianthus Therapeutics, Inc. Common Stock

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IV rank shows where DNTH'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.

DNTH's 30-day at-the-money implied volatility was 73.3% as of Oct 16, 2026. Its 52-week IV rank is 50 and its IV percentile is 77%: IV was lower on 77% of the past year's sessions. Over those 52 weeks it ranged from 52.5% (Aug 11, 2026) to 94.3% (Feb 4, 2026). On the 90-session window our screeners use, the IV rank is 62.

DNTH 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).

DNTH IV rank and implied volatility as of 2026-10-16

52-Week IV Rank

0 = year low, 100 = year high

IV Percentile

77%

of past-year sessions had lower IV

90-Session IV Rank

used by our screeners

30-Day ATM IV

73.3%

1-year average 65.8%

52-Week IV High

94.3%

2026-02-04

52-Week IV Low

52.5%

2026-08-11

History Since

2024-07-09

559 sessions

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

DNTH implied volatility by month

Month	Avg ATM IV	High	Low	Avg IV Rank (90-session)
Oct 2026 (to date)	78.4%	86.0%	73.3%	94
Sep 2026	63.4%	75.3%	56.5%	71
Aug 2026	56.6%	62.2%	52.5%	26
Jul 2026	59.1%	63.1%	54.6%	30
Jun 2026	59.2%	65.1%	55.6%	10
May 2026	58.7%	61.5%	55.9%	5
Apr 2026	63.0%	67.6%	58.1%	11
Mar 2026	65.0%	77.5%	59.4%	20
Feb 2026	79.4%	94.3%	68.2%	60
Jan 2026	77.2%	92.7%	65.9%	54
Dec 2025	66.2%	76.7%	59.2%	6
Nov 2025	67.5%	76.2%	57.2%	5
Oct 2025	70.3%	80.0%	62.1%	4
Sep 2025	99.6%	222.9%	63.8%	21
Aug 2025	196.8%	223.2%	144.8%	97
Jul 2025	113.7%	146.3%	92.4%	66
Jun 2025	106.7%	134.3%	74.2%	59
May 2025	88.2%	99.4%	71.9%	27
Apr 2025	96.3%	126.7%	77.5%	39
Mar 2025	99.9%	120.2%	79.5%	59
Feb 2025	96.2%	103.7%	88.0%	52
Jan 2025	95.9%	112.4%	86.7%	51
Dec 2024	95.5%	108.2%	82.8%	51
Nov 2024	92.2%	120.4%	70.0%	42
Oct 2024	96.7%	112.8%	84.9%	45
Sep 2024	104.0%	111.3%	88.6%	65
Aug 2024	99.6%	116.3%	81.0%	41
Jul 2024	100.6%	113.8%	89.0%	—

DNTH IV rank: last 30 sessions

Date	IV Rank (90-session)	30-Day ATM IV	7-Day ATM IV
2026-10-16	62	73.3%	—
2026-10-15	100	86.0%	—
2026-10-14	94	81.3%	114.5%
2026-10-13	92	80.8%	90.1%
2026-10-12	100	83.2%	95.1%
2026-10-09	100	78.4%	71.1%
2026-10-08	99	77.9%	70.3%
2026-10-07	100	78.0%	67.7%
2026-10-06	100	77.8%	64.6%
2026-10-05	100	77.2%	64.3%
2026-10-02	93	73.6%	58.1%
2026-10-01	91	73.3%	63.0%
2026-09-30	100	75.3%	60.3%
2026-09-29	100	74.6%	63.2%
2026-09-28	100	73.2%	58.2%
2026-09-25	100	71.2%	59.5%
2026-09-24	99	68.9%	—
2026-09-23	100	69.1%	—
2026-09-22	83	63.0%	—
2026-09-21	85	63.2%	—
2026-09-18	61	60.2%	—
2026-09-17	66	60.8%	—
2026-09-16	76	62.1%	71.4%
2026-09-15	72	61.5%	66.5%
2026-09-14	63	60.4%	74.4%
2026-09-11	47	58.4%	58.6%
2026-09-10	54	59.2%	53.2%
2026-09-09	54	59.3%	54.4%
2026-09-08	60	60.0%	54.2%
2026-09-04	32	56.5%	48.4%