SMLL · IV Rank History

Harbor Active Small Cap ETF · ETF

Iron condor setups Expected move IV rank history Fibonacci levels

IV rank shows where SMLL'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.

SMLL's 30-day at-the-money implied volatility was 23.5% as of Oct 9, 2026. Its 52-week IV rank is 18 and its IV percentile is 21%: IV was lower on 21% of the past year's sessions. Over those 52 weeks it ranged from 16.6% (Dec 22, 2025) to 54.4% (Apr 16, 2026). On the 90-session window our screeners use, the IV rank is 23.

SMLL IV rank history

370 sessions

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

SMLL IV rank and implied volatility as of 2026-10-09

52-Week IV Rank

0 = year low, 100 = year high

IV Percentile

21%

of past-year sessions had lower IV

90-Session IV Rank

used by our screeners

30-Day ATM IV

23.5%

1-year average 28.4%

7-Day ATM IV

17.9%

90-session rank 0

52-Week IV High

54.4%

2026-04-16

52-Week IV Low

16.6%

2025-12-22

History Since

2025-04-08

370 sessions

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

SMLL implied volatility by month

Month	Avg ATM IV	High	Low	Avg IV Rank (90-session)
Oct 2026 (to date)	27.6%	35.0%	23.5%	42
Sep 2026	25.5%	37.2%	18.9%	31
Aug 2026	24.2%	40.2%	18.6%	15
Jul 2026	24.2%	30.3%	19.8%	11
Jun 2026	25.8%	35.6%	21.4%	13
May 2026	29.0%	40.7%	23.7%	28
Apr 2026	33.5%	54.4%	21.8%	48
Mar 2026	31.1%	37.4%	27.1%	45
Feb 2026	28.8%	34.4%	23.0%	38
Jan 2026	26.2%	48.6%	18.8%	30
Dec 2025	28.3%	47.6%	16.6%	32
Nov 2025	30.4%	41.3%	23.6%	31
Oct 2025	34.0%	46.0%	22.5%	42
Sep 2025	29.7%	39.0%	21.2%	30
Aug 2025	28.5%	41.7%	20.6%	26
Jul 2025	27.4%	54.0%	19.4%	24
Jun 2025	24.7%	32.1%	19.6%	13
May 2025	27.8%	45.1%	21.7%	20
Apr 2025	34.4%	51.8%	28.0%	—

SMLL IV rank: last 30 sessions

Date	IV Rank (90-session)	30-Day ATM IV	7-Day ATM IV
2026-10-09	23	23.5%	17.9%
2026-10-08	34	26.0%	38.2%
2026-10-07	76	35.0%	28.0%
2026-10-06	46	28.6%	47.1%
2026-10-05	24	23.7%	33.3%
2026-10-02	29	24.8%	30.9%
2026-10-01	61	31.7%	38.5%
2026-09-30	71	33.8%	50.5%
2026-09-29	20	22.8%	24.8%
2026-09-28	86	37.2%	54.4%
2026-09-25	45	28.2%	31.1%
2026-09-24	25	24.1%	—
2026-09-23	82	36.3%	—
2026-09-22	28	24.7%	—
2026-09-21	8	20.3%	—
2026-09-18	39	26.9%	—
2026-09-17	2	18.9%	—
2026-09-16	11	21.0%	71.7%
2026-09-15	9	20.5%	60.8%
2026-09-14	10	20.8%	49.9%
2026-09-11	10	20.8%	39.3%
2026-09-10	18	22.6%	39.1%
2026-09-09	15	22.1%	33.2%
2026-09-08	61	32.6%	43.8%
2026-09-04	6	20.0%	25.6%
2026-09-03	40	27.8%	32.0%
2026-09-02	24	24.2%	27.3%
2026-09-01	41	30.0%	40.5%
2026-08-31	16	23.0%	23.4%
2026-08-28	3	19.5%	20.3%