SPX Options History — April 2026

In April 2026, SPX traded between $6567.01 and $7176.35. ATM implied volatility averaged 16.6%, placing in the 24.6% IV rank vs the trailing year. The 30-day expected move averaged 4.8%. IV traded below realized volatility by 3.2% (HV 20d: 19.9%). Max pain ranged from $6700.00 to $6900.00. Net GEX was positive for 18 of 19 trading days. Term structure was in contango for 6 of 19 days. Put/call ratio averaged 1.15.

Notable Days

2026-04-17: Highest Volume — 6,267,120 contracts
2026-04-08: Largest IV drop — 20.2% change
2026-04-23: Highest IV Rank — 33.5%
2026-04-07: Largest Expected Move — 6.2%

Monthly Statistics

Metric	Avg	Min	Max	Open	Close
Price	$6928.45	$6567.01	$7176.35	$6586.74	$7130.27
Max Pain	$6816.32	$6700.00	$6900.00	$6700.00	$6900.00
ATM IV	16.6%	14.3%	21.8%	20.6%	15.6%
Expected Move	4.8%	4.1%	6.2%	5.9%	4.5%
HV 20d	19.9%	15.3%	22.1%	20.3%	15.6%
HV 60d	16.3%	15.5%	16.9%	15.6%	16.5%
IV Rank	24.6%	14.4%	33.5%	28.6%	31.3%
IV Percentile	69.8%	53.6%	90.5%	86.9%	68.7%
Term Structure	-0.2%	-0.5%	0.3%	-0.5%	-0.3%
VWIV	18.5%	16.2%	22.9%	22.1%	18.0%
Skew 25d	6.4%	4.2%	9.6%	8.4%	5.6%
Skew 10d	13.0%	9.4%	17.9%	17.0%	11.6%
Call IV 25d	13.8%	12.5%	16.6%	16.4%	13.1%
Put IV 25d	20.1%	16.7%	26.2%	24.8%	18.7%
Bid-Ask Spread %	6.39	3.67	11.08	7.35	8.76
Gamma HHI	0.02	0.01	0.05	0.01	0.01
Net GEX	59.06B	-860.7M	124.08B	27.50B	29.86B
Net DEX	-941.86B	-1423.77B	-227.86B	-328.99B	-1092.52B
Net VEX	-11.22B	-11.85B	-10.52B	-11.18B	-11.17B
Div Yield	0.0%	0.0%	0.0%	0.0%	0.0%
P/C Ratio	1.15	0.91	1.32	1.32	1.27
Total Volume	4,671,025.474	3,330,358	6,267,120	5,047,852	3,346,491
Total OI	20,822,195.947	19,531,751	22,073,848	19,531,751	21,677,462

Daily Data (19 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	$6586.74	$6700.00	20.6%	5.9%	20.3%	28.6%	22.1%	8.4%	-0.5%	27.50B	-328.99B	-11.18B	1.32	7.35	2,173,751	2,874,101	7,984,445	11,547,306
2026-04-02	$6567.01	$6800.00	20.8%	6.0%	20.1%	29.1%	22.9%	8.5%	-0.4%	-860.7M	-227.86B	-11.28B	1.28	3.67	2,231,287	2,850,700	8,069,615	11,838,443
2026-04-06	$6607.88	$6800.00	20.0%	5.7%	20.0%	26.9%	22.5%	8.6%	0.1%	22.57B	-338.28B	-11.24B	1.25	4.64	1,733,565	2,172,954	7,995,371	11,800,231
2026-04-07	$6600.95	$6800.00	21.8%	6.2%	19.7%	32.1%	20.9%	9.6%	0.0%	6.53B	-299.68B	-11.36B	1.08	11.08	2,184,187	2,368,396	8,074,512	11,977,798
2026-04-08	$6773.60	$6800.00	17.4%	5.0%	22.0%	19.4%	20.5%	7.5%	-0.4%	78.80B	-799.23B	-11.28B	1.31	4.58	2,373,667	3,111,611	8,174,191	12,063,572
2026-04-09	$6827.46	$6800.00	15.8%	4.5%	22.1%	14.7%	17.3%	6.6%	-0.4%	98.91B	-891.08B	-11.33B	1.05	4.25	2,321,453	2,428,210	8,305,981	12,345,202
2026-04-10	$6815.56	$6800.00	15.6%	4.5%	21.5%	14.4%	17.6%	6.4%	0.1%	46.41B	-801.87B	-11.43B	1.17	4.46	1,964,725	2,300,591	8,302,517	12,395,462
2026-04-13	$6863.77	$6800.00	15.3%	4.4%	21.3%	17.1%	17.7%	6.3%	0.1%	57.46B	-889.46B	-11.40B	1.07	4.82	2,182,969	2,344,969	8,297,554	12,334,818
2026-04-14	$6964.60	$6800.00	14.7%	4.2%	21.6%	14.9%	16.5%	5.7%	0.3%	110.41B	-1214.15B	-11.64B	0.91	5.10	3,054,020	2,784,146	8,466,045	12,515,663
2026-04-15	$7017.02	$6800.00	15.2%	4.3%	21.7%	22.4%	17.4%	5.1%	-0.4%	124.08B	-1299.02B	-11.85B	0.99	4.86	2,701,062	2,668,256	8,710,054	12,914,115
2026-04-16	$7038.77	$6800.00	14.7%	4.2%	20.8%	21.1%	16.6%	4.7%	-0.3%	106.46B	-1204.19B	-10.52B	1.09	4.93	2,371,888	2,590,241	8,884,541	13,189,307
2026-04-17	$7123.77	$6800.00	14.3%	4.1%	21.0%	19.1%	16.2%	4.2%	0.0%	106.91B	-1423.77B	-10.78B	0.93	6.96	3,253,566	3,013,554	8,308,905	12,243,374
2026-04-20	$7100.81	$6825.00	15.5%	4.4%	19.5%	25.5%	17.2%	5.0%	0.2%	43.60B	-1197.23B	-11.03B	1.19	6.05	1,754,911	2,080,505	8,580,434	12,106,511
2026-04-21	$7057.52	$6850.00	17.0%	4.9%	19.2%	33.3%	18.3%	6.2%	0.0%	18.18B	-1012.31B	-11.12B	1.25	9.72	2,354,702	2,949,978	8,622,906	12,221,007
2026-04-22	$7128.10	$6850.00	15.4%	4.4%	18.9%	24.9%	17.8%	5.4%	-0.4%	65.90B	-1220.48B	-11.09B	1.17	6.74	1,659,142	1,939,183	8,764,079	12,518,488
2026-04-23	$7099.34	$6850.00	16.2%	4.6%	19.1%	33.5%	18.3%	6.2%	-0.5%	33.67B	-1101.33B	-11.09B	1.26	8.59	2,287,365	2,873,572	8,793,677	12,575,330
2026-04-24	$7161.08	$6860.00	15.4%	4.4%	17.6%	30.3%	17.4%	5.7%	-0.5%	79.60B	-1286.71B	-11.26B	1.05	7.13	2,007,019	2,112,389	8,881,609	12,746,180
2026-04-27	$7176.35	$6875.00	15.1%	4.3%	15.3%	28.1%	16.8%	5.2%	0.1%	66.16B	-1267.24B	-11.18B	1.19	7.69	1,519,125	1,811,233	8,819,601	12,575,417
2026-04-29	$7130.27	$6900.00	15.6%	4.5%	15.6%	31.3%	18.0%	5.6%	-0.3%	29.86B	-1092.52B	-11.17B	1.27	8.76	1,474,499	1,871,992	8,888,911	12,788,551