CURB · IV Rank History

Curbline Properties Corp.

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IV rank shows where CURB'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.

CURB's 30-day at-the-money implied volatility was 34.9% as of Oct 20, 2026. Its 52-week IV rank is 27 and its IV percentile is 44%: IV was lower on 44% of the past year's sessions. Over those 52 weeks it ranged from 21.7% (Aug 26, 2026) to 70.6% (Oct 31, 2025). On the 90-session window our screeners use, the IV rank is 53.

CURB IV rank history

384 sessions

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

CURB IV rank and implied volatility as of 2026-10-20

52-Week IV Rank

0 = year low, 100 = year high

IV Percentile

44%

of past-year sessions had lower IV

90-Session IV Rank

used by our screeners

30-Day ATM IV

34.9%

1-year average 36.0%

52-Week IV High

70.6%

2025-10-31

52-Week IV Low

21.7%

2026-08-26

History Since

2025-04-07

384 sessions

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

CURB implied volatility by month

Month	Avg ATM IV	High	Low	Avg IV Rank (90-session)
Oct 2026 (to date)	38.4%	46.6%	25.4%	69
Sep 2026	30.7%	41.9%	22.8%	39
Aug 2026	25.3%	29.4%	21.7%	6
Jul 2026	33.0%	44.6%	25.6%	29
Jun 2026	31.9%	38.6%	25.3%	22
May 2026	33.7%	36.4%	26.5%	21
Apr 2026	38.5%	49.3%	32.7%	34
Mar 2026	38.6%	51.8%	28.6%	32
Feb 2026	39.5%	54.6%	28.6%	31
Jan 2026	40.1%	64.6%	25.4%	28
Dec 2025	37.5%	45.6%	26.1%	18
Nov 2025	38.4%	54.5%	27.7%	20
Oct 2025	43.6%	70.6%	26.9%	28
Sep 2025	42.0%	85.1%	28.5%	26
Aug 2025	61.2%	88.3%	26.0%	42
Jul 2025	58.4%	70.0%	48.8%	27
Jun 2025	49.7%	57.7%	41.1%	8
May 2025	59.9%	77.6%	49.9%	12
Apr 2025	73.6%	104.1%	63.1%	—

CURB IV rank: last 30 sessions

Date	IV Rank (90-session)	30-Day ATM IV	7-Day ATM IV
2026-10-20	53	34.9%	—
2026-10-19	73	39.8%	—
2026-10-16	98	46.2%	—
2026-10-15	15	25.4%	—
2026-10-14	65	38.0%	127.3%
2026-10-13	78	41.2%	58.4%
2026-10-12	58	36.1%	83.0%
2026-10-09	85	42.9%	83.3%
2026-10-08	44	32.6%	45.5%
2026-10-07	100	46.6%	79.6%
2026-10-06	73	38.4%	55.3%
2026-10-05	97	44.1%	67.8%
2026-10-02	77	39.3%	49.8%
2026-10-01	47	32.5%	46.8%
2026-09-30	31	28.9%	34.9%
2026-09-29	72	38.3%	47.0%
2026-09-28	49	32.9%	39.1%
2026-09-25	88	41.9%	52.1%
2026-09-24	40	30.8%	—
2026-09-23	75	38.9%	—
2026-09-22	50	33.3%	—
2026-09-21	52	33.5%	—
2026-09-18	33	29.3%	—
2026-09-17	29	28.3%	—
2026-09-16	62	35.9%	127.3%
2026-09-15	60	35.6%	45.4%
2026-09-14	19	26.1%	53.6%
2026-09-11	15	25.2%	31.3%
2026-09-10	18	25.9%	29.6%
2026-09-09	22	26.7%	33.2%