ARKK options analytics

ARKK · ETF

Data as of 22 September 2026 (end of day)

Some metrics unavailable for this session

ARKK options are pricing a 30-day at-the-money volatility of 33.7%, a move of about ±9.7% over the next month. That is higher than 13% of the 230 sessions in its trailing year.

Its 25-delta puts carry 2.50 volatility points more than the calls, around the middle of its own range for the past year.

Longer-dated options carry more: 90-day volatility is 6% above 30-day.

Current readings

30-day ATM implied volatilityⓘ: 33.67%
25-delta risk reversalⓘ: +2.50
25-delta butterflyⓘ: +0.13
Term structure slopeⓘ: 1.063

Where 30-day implied volatility sits

Against 230 prior sessions (one-year window)

29.5%72.9%

IV percentile, 1 year: 13%
IV rank, 1 year: 10%
IV percentile, 2 years: 13%
IV rank, 2 years: 10%

Rank is the position between the lowest and highest readings in the window, so a single past extreme pins everything after it near one end. Percentile is the share of sessions below the current reading and is unaffected by how far that extreme reached. Both are withheld when the window holds fewer than 180 sessions.

Session detail

Underlying close: $91.61
30-day implied forward: $91.97
60-day ATM IV: 35.70%
90-day ATM IV: 35.78%
180-day ATM IV: —
Expirations used: 8
Total open interest: 364,923
Put / call open interest: 0.83

The forward is derived from put-call parity on the strikes nearest the money, not taken from the underlying close. It is what every moneyness and delta on this page is measured against.

30-day at-the-money implied volatility

Last 232 sessions

Show the underlying numbers (most recent 120)

Session	30-day ATM IV	25-delta RR	Term slope	Close
2026-09-22	33.67%	+2.50	1.063	$91.61
2026-09-21	34.60%	+2.24	1.042	$90.72
2026-09-18	32.12%	+2.23	1.095	$88.23
2026-09-17	33.64%	+2.40	1.050	$86.92
2026-09-16	34.47%	+6.14	1.071	$83.18
2026-09-15	35.75%	+4.23	1.057	$83.49
2026-09-14	34.91%	+2.26	1.099	$84.72
2026-09-11	36.29%	-0.02	1.024	$83.58
2026-09-10	35.85%	+4.15	1.052	$83.06
2026-09-09	35.80%	+1.04	1.024	$84.56
2026-09-08	36.25%	+2.33	1.032	$86.08
2026-09-04	34.64%	+0.06	1.057	$86.22
2026-09-03	33.74%	+4.16	1.053	$87.14
2026-09-02	32.50%	+2.84	1.149	$83.39
2026-09-01	37.43%	+1.51	0.978	$83.08
2026-08-31	33.97%	+3.81	1.135	$85.57
2026-08-28	34.72%	+1.00	1.121	$84.59
2026-08-27	35.83%	+0.72	1.098	$87.38
2026-08-26	36.75%	+1.93	1.020	$85.78
2026-08-25	35.66%	+3.67	1.091	$86.37
2026-08-24	37.15%	+0.93	0.971	$83.92
2026-08-21	34.59%	+3.77	1.155	$86.21
2026-08-20	35.44%	+1.44	1.084	$83.27
2026-08-19	37.09%	+0.61	1.030	$83.31
2026-08-18	—	—	—	$79.15
2025-06-30	42.22%	+4.73	1.015	$70.29
2025-06-27	41.39%	+4.49	1.047	$69.84
2025-06-26	41.66%	+4.48	1.048	$71.03
2025-06-25	42.29%	+6.03	1.024	$69.50
2025-06-24	45.12%	+6.09	0.981	$70.30
2025-06-23	48.11%	+3.92	0.943	$68.85
2025-06-20	45.95%	+5.15	0.952	$67.73
2025-06-18	45.24%	+3.32	0.967	$66.77
2025-06-17	43.44%	+3.14	0.964	$63.91
2025-06-16	42.60%	+2.50	0.962	$64.93
2025-06-13	37.33%	+2.14	1.070	$62.19
2025-06-12	38.37%	+3.81	1.026	$62.02
2025-06-11	39.21%	+2.72	1.016	$63.53
2025-06-10	38.90%	+2.53	1.058	$62.94
2025-06-09	42.22%	+4.61	0.979	$62.41
2025-06-06	48.22%	+4.74	0.901	$61.13
2025-06-05	40.77%	+7.73	0.993	$56.36
2025-06-04	37.06%	+4.83	1.036	$57.98
2025-06-03	36.90%	+5.50	1.058	$57.94
2025-06-02	37.37%	+4.13	1.041	$57.13
2025-05-30	37.85%	+5.93	1.041	$56.37
2025-05-29	37.76%	+6.21	1.047	$56.62
2025-05-28	39.94%	+5.49	0.989	$56.98
2025-05-27	39.74%	+6.67	0.998	$58.05
2025-05-23	39.90%	+5.27	1.002	$56.07
2025-05-22	40.29%	+5.62	0.987	$56.38
2025-05-21	41.62%	+5.78	0.974	$55.68
2025-05-20	38.56%	+6.22	1.006	$57.46
2025-05-19	38.39%	+4.77	1.009	$57.40
2025-05-16	37.49%	+4.90	1.014	$58.37
2025-05-15	39.43%	+5.76	0.998	$56.73
2025-05-14	38.99%	+5.89	0.998	$57.56
2025-05-13	38.36%	+6.02	0.997	$57.41
2025-05-12	38.85%	+5.66	1.009	$54.48
2025-05-09	41.41%	+8.14	1.022	$51.35
2025-05-08	42.04%	+10.24	1.010	$51.47
2025-05-07	44.49%	+10.70	0.972	$49.59
2025-05-06	46.27%	+7.68	0.947	$48.78
2025-05-05	43.32%	+12.96	0.991	$50.69
2025-05-02	41.73%	+10.09	1.011	$51.90
2025-05-01	44.32%	+12.50	0.998	$50.77
2025-04-30	42.63%	+13.76	1.039	$50.84
2025-04-29	45.09%	+14.91	0.969	$51.53
2025-04-28	46.29%	+9.31	1.007	$51.24
2025-04-25	41.14%	+13.63	1.062	$51.00
2025-04-24	43.35%	+14.35	1.008	$49.99
2025-04-23	49.96%	+9.35	0.979	$47.95
2025-04-22	50.66%	+14.75	0.978	$46.12
2025-04-21	54.36%	+18.75	0.890	$44.44
2025-04-17	52.85%	+13.11	0.862	$45.12
2025-04-16	56.61%	+16.31	0.856	$45.08
2025-04-15	49.71%	+12.52	0.944	$46.55
2025-04-14	53.64%	+18.41	0.910	$46.26
2025-04-11	59.78%	+23.95	0.875	$45.89
2025-04-10	62.81%	+13.55	0.873	$44.53
2025-04-09	52.57%	+11.55	0.865	$47.25
2025-04-08	72.13%	+22.51	0.847	$40.51
2025-04-07	72.86%	+24.94	0.800	$42.28
2025-04-04	70.44%	+13.69	0.817	$41.94
2025-04-03	53.44%	+1.88	0.888	$45.12
2025-04-02	48.71%	+4.02	0.858	$49.15
2025-04-01	49.04%	+4.36	0.899	$47.80
2025-03-31	46.92%	+5.58	0.940	$47.58
2025-03-28	46.39%	+3.68	0.936	$48.70
2025-03-27	44.14%	+7.12	0.962	$50.78
2025-03-26	41.66%	+9.02	1.003	$51.66
2025-03-25	38.41%	+8.22	1.023	$54.14
2025-03-24	41.25%	+5.34	0.940	$54.18
2025-03-21	42.97%	+4.77	0.945	$51.50
2025-03-20	45.04%	+4.72	0.926	$50.02
2025-03-19	46.36%	+6.66	0.905	$50.05
2025-03-18	48.92%	+4.48	0.906	$48.24
2025-03-17	46.96%	+7.41	0.927	$49.98
2025-03-14	49.77%	+5.92	0.902	$49.19
2025-03-13	55.75%	+7.69	0.868	$47.25
2025-03-12	53.46%	+9.01	0.887	$49.61
2025-03-11	54.25%	+10.73	0.892	$48.19
2025-03-10	57.36%	+8.27	0.844	$47.86
2025-03-07	49.57%	+4.55	0.934	$52.45
2025-03-06	50.11%	+8.89	0.908	$52.14
2025-03-05	48.00%	+6.73	0.929	$54.70
2025-03-04	47.34%	+6.65	0.938	$53.17
2025-03-03	51.13%	+6.85	0.847	$53.09
2025-02-28	44.31%	+6.11	0.932	$55.64
2025-02-27	46.48%	+3.14	0.911	$54.59
2025-02-26	42.67%	+5.66	0.936	$56.46
2025-02-25	42.18%	+4.17	0.915	$56.00
2025-02-24	40.08%	+2.91	0.971	$59.08
2025-02-21	38.90%	+4.33	0.971	$60.20
2025-02-20	36.09%	+4.41	1.006	$63.98
2025-02-19	35.37%	+3.94	1.012	$65.71
2025-02-18	34.67%	+4.17	1.047	$66.48
2025-02-14	34.26%	+3.41	1.019	$67.02
2025-02-13	33.04%	+5.63	1.068	$64.78
2025-02-12	36.61%	+1.54	0.986	$62.68

The chart covers every session in the archive, 232 in total. The table lists the most recent 120.

25-delta risk reversal

Last 232 sessions

The dashed line marks zero, where the 25-delta put and call carry the same implied volatility.

Skew curve

Implied volatility by delta, front expirations

Implied volatility by delta

3d (2026-09-25) · 24d (2026-10-16) · 31d (2026-10-23)

The axis is call delta. Readings to the right of the dashed centre line are taken from the out-of-the-money put at that strike, which is the contract whose quote the volatility was solved from. Points are only plotted where surviving quotes bracket the delta on both sides; nothing is extrapolated past the last traded strike.

Show the underlying numbers

Delta	3d	24d	31d
10Δ call	36.22%	—	—
15Δ call	35.93%	—	—
20Δ call	35.59%	32.85%	32.16%
25Δ call	35.28%	32.76%	32.52%
30Δ call	34.95%	32.74%	32.82%
35Δ call	34.76%	33.13%	33.08%
40Δ call	34.89%	33.02%	33.29%
45Δ call	35.14%	33.56%	33.51%
ATM	35.21%	33.70%	33.66%
45Δ put	34.79%	33.98%	33.49%
40Δ put	34.94%	34.03%	33.44%
35Δ put	35.28%	34.29%	33.99%
30Δ put	35.75%	34.92%	34.16%
25Δ put	36.28%	34.96%	35.06%
20Δ put	36.85%	35.22%	35.23%
15Δ put	37.67%	37.96%	35.20%
10Δ put	39.30%	36.93%	36.89%
5Δ put	42.68%	—	—

Wing readings by expiration

Expiration	Days	Forward	ATM IV	25Δ put	25Δ call	RR	Butterfly	Quotes
2026-09-25	3	$91.87	35.21%	36.28%	35.28%	+1.01	+0.57	13
2026-10-16	24	$91.92	33.70%	34.96%	32.76%	+2.21	+0.15	23
2026-10-23	31	$91.97	33.66%	35.06%	32.52%	+2.54	+0.13	27
2026-10-30	38	$91.73	34.85%	36.58%	34.14%	+2.45	+0.51	20
2026-11-20	59	$91.87	35.70%	37.28%	35.14%	+2.14	+0.51	29
2026-12-18	87	$92.20	35.75%	38.82%	34.00%	+4.82	+0.67	32
2027-01-15	115	$91.97	36.01%	37.07%	35.55%	+1.52	+0.30	45
2027-03-19	178	$92.10	37.19%	38.24%	35.99%	+2.25	-0.08	43

Each curve above is one expiration. The vertical position is implied volatility; the horizontal position is the delta of the contract it was read from. For US equities the curve normally slopes upward to the right, meaning out-of-the-money puts carry higher implied volatility than equidistant calls.

The 25-delta risk reversal summarises that slope as a single number: the 25-delta put volatility minus the 25-delta call volatility. The butterfly summarises the curvature: the average of the two wings minus the at-the-money reading.

Term structure

At-the-money implied volatility by expiration

8 listed expirations produced a usable reading

The horizontal axis is the square root of days to expiration, which is the scale volatility lives on. A curve that is flat in variance terms plots as a straight line here rather than bending sharply through the front week.

Show the underlying numbers

Expiration	Days	Forward	ATM IV	ATM strike	Quotes used
2026-09-25	3 days	$91.87	35.21%	$91.92	13
2026-10-16	24 days	$91.92	33.70%	$92.27	23
2026-10-23	31 days	$91.97	33.66%	$92.42	27
2026-10-30	38 days	$91.73	34.85%	$92.31	20
2026-11-20	59 days	$91.87	35.70%	$92.83	29
2026-12-18	87 days	$92.20	35.75%	$93.62	32
2027-01-15	115 days	$91.97	36.01%	$93.87	45
2027-03-19	178 days	$92.10	37.19%	$95.26	43

Constant maturities

Interpolated between the bracketing listed expirations, in total variance

30 days: 33.67%
60 days: 35.70%
90 days: 35.78%
180 days: —

Interpolation is linear in total variance, not in volatility. Interpolating volatility directly implies a forward variance that can be negative between two expirations. A tenor beyond the longest listed expiration is reported as unavailable rather than extrapolated.

Term structure slope

Last 232 sessions

The dashed line marks 1.00, where the 90-day and 30-day at-the-money volatilities are equal. Above it the longer tenor carries the higher volatility.

The term structure is the at-the-money implied volatility of each listed expiration, plotted against how far away that expiration is. Its usual shape for a calm underlying slopes gently upward, because a longer horizon admits more uncertainty.

It inverts when the market prices a dated event: an expiration that captures a scheduled announcement carries the variance of that event on top of ordinary trading, so a shorter contract can print a higher volatility than a longer one.