DIA Options History — October 2025

In October 2025, DIA traded between $456.31 and $477.36. ATM implied volatility averaged 14.1%, placing in the 11.6% IV rank vs the trailing year. The 30-day expected move averaged 4.0%. IV traded above realized volatility by 4.8% (HV 20d: 9.2%). Max pain ranged from $458.00 to $467.00. Net GEX was positive for 18 of 23 trading days. Term structure was in contango for 13 of 23 days. Put/call ratio averaged 1.38.

Notable Days

2025-10-03: Highest Volume — 71,045 contracts
2025-10-10: Largest IV spike — 22.4% change
2025-10-16: Highest IV Rank — 24.3%
2025-10-16: Largest Expected Move — 5.1%

Monthly Statistics

Metric	Avg	Min	Max	Open	Close
Price	$467.25	$456.31	$477.36	$464.61	$476.93
Max Pain	$463.04	$458.00	$467.00	$458.00	$467.00
ATM IV	14.1%	12.1%	18.0%	13.1%	13.7%
Expected Move	4.0%	3.4%	5.1%	3.5%	3.9%
HV 20d	9.2%	5.8%	11.2%	8.2%	11.1%
HV 60d	10.0%	9.5%	10.6%	9.7%	9.7%
IV Rank	11.6%	5.3%	24.3%	8.5%	10.2%
IV Percentile	56.5%	25.0%	89.7%	41.3%	58.3%
Term Structure	0.0%	-0.4%	0.4%	0.2%	0.4%
VWIV	14.8%	12.6%	17.9%	13.7%	14.5%
Skew 25d	4.4%	2.9%	7.9%	3.7%	3.3%
Skew 10d	9.5%	6.3%	15.8%	7.8%	7.2%
Call IV 25d	12.2%	10.8%	14.8%	11.5%	12.3%
Put IV 25d	16.6%	14.3%	22.1%	15.2%	15.6%
Bid-Ask Spread %	9.86	3.71	43.58	3.71	5.64
Gamma HHI	0.04	0.03	0.06	0.04	0.05
Net GEX	84.2M	-101.9M	287.5M	100.0M	120.9M
Net DEX	-1.64B	-2.90B	42.1M	-1.63B	-2.55B
Net VEX	-26.5M	-27.9M	-24.7M	-25.2M	-27.9M
Div Yield	0.0%	0.0%	0.0%	0.0%	0.0%
P/C Ratio	1.38	0.75	2.98	1.25	1.33
Total Volume	43,705.783	22,325	71,045	22,325	56,379
Total OI	475,913.348	444,212	528,829	444,212	528,829

Daily Data (23 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
2025-10-01	$464.61	$458.00	13.1%	3.5%	8.2%	8.5%	13.7%	3.7%	0.2%	100.0M	-1.63B	-25.2M	1.25	3.71	9,901	12,424	159,497	284,715
2025-10-02	$465.18	$458.00	13.4%	3.6%	7.5%	9.5%	12.6%	3.9%	0.2%	94.2M	-1.63B	-25.7M	0.77	3.85	18,222	14,112	162,479	287,776
2025-10-03	$468.10	$458.00	13.2%	3.4%	7.5%	8.9%	12.7%	3.9%	0.2%	282.6M	-2.25B	-24.8M	1.58	3.78	27,570	43,475	170,401	291,773
2025-10-06	$466.92	$463.00	13.5%	3.9%	7.6%	9.7%	14.6%	3.7%	0.1%	107.8M	-1.75B	-24.7M	1.14	8.49	12,871	14,627	158,579	288,746
2025-10-07	$465.63	$463.00	13.8%	4.0%	7.6%	10.9%	15.2%	4.0%	0.1%	98.1M	-1.55B	-25.2M	1.60	7.93	11,220	17,932	162,839	291,108
2025-10-08	$466.16	$463.00	13.6%	4.0%	7.2%	10.1%	16.0%	3.8%	0.1%	87.4M	-1.52B	-25.9M	1.17	8.72	16,478	19,271	166,755	298,532
2025-10-09	$463.50	$464.00	13.8%	4.0%	5.8%	10.8%	14.8%	4.0%	0.1%	-3.9M	-1.02B	-26.6M	1.16	8.20	14,870	17,227	175,001	308,081
2025-10-10	$456.31	$464.00	16.9%	4.8%	7.9%	20.8%	16.7%	6.3%	-0.2%	-101.9M	42.1M	-27.9M	1.19	10.51	29,896	35,673	178,383	307,941
2025-10-13	$460.92	$463.00	15.0%	4.3%	8.7%	14.8%	15.8%	5.1%	-0.1%	-15.9M	-728.2M	-26.7M	1.38	9.15	11,381	15,659	163,929	298,866
2025-10-14	$462.03	$463.00	16.0%	4.6%	8.7%	18.0%	16.7%	5.9%	-0.1%	5.3M	-860.7M	-27.0M	1.29	9.67	19,891	25,587	166,892	302,926
2025-10-15	$462.60	$463.00	15.8%	4.5%	8.6%	17.1%	15.9%	5.3%	-0.2%	19.5M	-974.9M	-27.1M	1.56	7.75	13,054	20,410	172,764	308,825
2025-10-16	$458.78	$463.00	18.0%	5.1%	9.0%	24.3%	17.8%	7.3%	-0.3%	-91.6M	-262.1M	-27.9M	1.19	9.71	20,911	24,824	174,186	311,978
2025-10-17	$462.14	$462.00	15.8%	4.4%	9.4%	17.0%	17.9%	7.9%	-0.4%	14.3M	-1.15B	-27.7M	1.71	43.58	21,134	36,046	183,872	315,534
2025-10-20	$467.36	$462.00	13.5%	3.9%	10.2%	9.9%	13.9%	4.4%	-0.3%	118.3M	-1.78B	-26.7M	1.36	3.85	15,051	20,442	160,174	289,780
2025-10-21	$469.82	$463.00	13.2%	3.8%	10.3%	8.8%	13.4%	4.4%	-0.3%	180.4M	-2.13B	-26.7M	1.49	3.99	19,226	28,652	165,128	295,760
2025-10-22	$465.87	$464.00	14.0%	4.0%	10.7%	11.4%	14.1%	5.2%	-0.4%	-19.3M	-1.31B	-27.5M	2.98	5.91	9,335	27,788	166,240	310,818
2025-10-23	$467.59	$464.00	12.5%	3.6%	10.6%	6.6%	15.2%	3.9%	0.1%	57.0M	-1.72B	-26.3M	0.75	38.36	23,139	17,325	168,566	313,834
2025-10-24	$472.57	$464.00	12.1%	3.5%	10.9%	5.3%	13.1%	3.5%	-0.1%	287.5M	-2.61B	-26.4M	1.48	9.85	17,463	25,901	179,337	319,342
2025-10-27	$475.16	$465.00	12.4%	3.6%	11.0%	6.2%	13.5%	3.2%	0.4%	177.3M	-2.57B	-25.8M	1.56	4.86	12,296	19,242	164,000	305,235
2025-10-28	$477.36	$465.00	12.8%	3.8%	11.1%	7.6%	13.7%	2.9%	0.3%	220.2M	-2.90B	-25.9M	0.83	7.00	35,924	29,798	168,251	311,935
2025-10-29	$475.78	$465.00	13.5%	3.9%	11.2%	9.6%	14.0%	3.1%	0.3%	119.1M	-2.45B	-27.0M	1.70	7.35	20,156	34,213	174,870	320,350
2025-10-30	$475.35	$466.00	14.0%	4.1%	11.2%	11.3%	14.5%	3.4%	0.3%	79.5M	-2.48B	-27.0M	1.38	5.04	28,630	39,607	181,264	329,916
2025-10-31	$476.93	$467.00	13.7%	3.9%	11.1%	10.2%	14.5%	3.3%	0.4%	120.9M	-2.55B	-27.9M	1.33	5.64	24,149	32,230	192,358	336,471