OPEN Options History — April 2026

In April 2026, OPEN traded between $4.31 and $5.50. ATM implied volatility averaged 93.2%, placing in the 7.7% IV rank vs the trailing year. The 30-day expected move averaged 26.7%. IV traded above realized volatility by 26.2% (HV 20d: 67.0%). Max pain ranged from $4.50 to $5.00. Net GEX was positive for 14 of 14 trading days. Term structure was in contango for 5 of 14 days. Put/call ratio averaged 0.21.

Notable Days

2026-04-21: Highest Volume — 380,745 contracts
2026-04-06: Largest IV spike — 12.6% change
2026-04-21: Highest IV Rank — 13.8%
2026-04-21: Largest Expected Move — 31.1%

Monthly Statistics

Metric	Avg	Min	Max	Open	Close
Price	$4.77	$4.31	$5.50	$4.59	$5.50
Max Pain	$4.96	$4.50	$5.00	$4.50	$5.00
ATM IV	93.2%	81.9%	108.5%	83.7%	108.5%
Expected Move	26.7%	23.5%	31.1%	24.0%	31.1%
HV 20d	67.0%	63.9%	73.3%	67.2%	63.9%
HV 60d	70.7%	67.3%	79.1%	79.1%	69.7%
IV Rank	7.7%	3.1%	13.8%	3.8%	13.8%
IV Percentile	24.9%	6.0%	45.2%	10.3%	45.2%
Term Structure	-0.1%	-4.4%	11.1%	7.3%	1.7%
VWIV	97.2%	82.8%	122.9%	82.8%	122.9%
Skew 25d	-1.0%	-7.7%	5.6%	4.5%	-7.7%
Skew 10d	-2.2%	-15.9%	11.3%	-1.5%	-15.9%
Call IV 25d	96.9%	79.7%	119.5%	81.4%	119.5%
Put IV 25d	95.9%	85.3%	111.8%	85.9%	111.8%
Bid-Ask Spread %	15.65	9.19	23.76	12.75	21.00
Gamma HHI	0.16	0.11	0.25	0.11	0.15
Net GEX	1.1M	421.9K	2.4M	751.9K	2.1M
Net DEX	-68.1M	-137.0M	-28.1M	-41.7M	-137.0M
Net VEX	-649.5K	-832.6K	-549.6K	-593.4K	-832.6K
Div Yield	0.0%	0.0%	0.0%	0.0%	0.0%
P/C Ratio	0.21	0.08	0.44	0.22	0.08
Total Volume	120,322.643	47,486	380,745	49,040	380,745
Total OI	774,440.286	691,789	905,324	783,184	809,983

Daily Data (14 trading days)

Date	Price	Max Pain	ATM IV	Exp Move	HV 20d	IV Rank	VWIV	Skew 25d	Term Str	GEX	DEX	VEX	P/C	Spread %	Call Vol	Put Vol	Call OI	Put OI
2026-04-01	$4.59	$4.50	83.7%	24.0%	67.2%	3.8%	82.8%	4.5%	7.3%	751.9K	-41.7M	-593.4K	0.22	12.75	40,098	8,942	564,816	218,368
2026-04-02	$4.71	$5.00	81.9%	23.5%	65.6%	3.1%	92.8%	5.6%	11.1%	682.8K	-47.5M	-601.6K	0.43	23.76	46,567	20,188	570,793	220,115
2026-04-06	$4.64	$5.00	92.2%	26.4%	65.1%	7.3%	95.8%	2.5%	-3.2%	790.6K	-43.8M	-589.9K	0.18	9.19	46,447	8,410	526,323	165,466
2026-04-07	$4.54	$5.00	93.9%	26.9%	64.4%	7.9%	95.2%	3.7%	-1.5%	813.1K	-40.9M	-587.8K	0.25	14.16	37,976	9,510	553,991	171,029
2026-04-08	$4.67	$5.00	89.8%	25.7%	65.5%	6.3%	92.2%	2.8%	0.8%	1.0M	-46.3M	-597.6K	0.22	21.08	57,983	13,018	562,499	176,525
2026-04-09	$4.34	$5.00	89.5%	25.7%	69.0%	6.2%	92.3%	-4.0%	0.0%	589.4K	-28.1M	-567.4K	0.23	11.14	52,238	12,085	588,185	180,677
2026-04-10	$4.31	$5.00	89.7%	25.7%	66.3%	6.2%	92.9%	-6.5%	0.8%	493.7K	-28.2M	-554.9K	0.44	18.10	45,872	20,205	599,055	172,222
2026-04-13	$4.31	$5.00	90.9%	26.1%	66.1%	6.7%	89.4%	3.5%	-4.4%	421.9K	-29.8M	-549.6K	0.14	12.05	66,446	9,444	542,791	160,203
2026-04-14	$4.54	$5.00	93.4%	26.8%	66.4%	7.7%	96.2%	-3.0%	-3.5%	929.3K	-49.8M	-595.0K	0.08	16.71	116,285	9,782	566,195	162,818
2026-04-15	$4.83	$5.00	93.5%	26.8%	66.1%	7.8%	94.6%	-1.0%	-3.2%	1.7M	-83.1M	-682.5K	0.19	19.38	121,165	23,417	630,936	166,019
2026-04-16	$5.26	$5.00	103.1%	29.6%	73.3%	11.6%	107.6%	-4.5%	-3.4%	2.4M	-133.0M	-776.2K	0.12	15.65	256,187	30,813	665,885	174,743
2026-04-17	$5.26	$5.00	97.3%	27.9%	71.5%	9.3%	102.5%	-5.8%	-1.0%	1.5M	-133.2M	-778.2K	0.10	11.22	162,481	16,748	718,209	187,115
2026-04-20	$5.30	$5.00	98.0%	28.1%	67.5%	9.6%	103.4%	-3.9%	-3.0%	1.8M	-110.5M	-785.8K	0.28	12.85	55,732	15,733	624,624	162,579
2026-04-21	$5.50	$5.00	108.5%	31.1%	63.9%	13.8%	122.9%	-7.7%	1.7%	2.1M	-137.0M	-832.6K	0.08	21.00	352,682	28,063	639,416	170,567