ACMR Options History — October 2025

In October 2025, ACMR traded between $36.68 and $43.91. ATM implied volatility averaged 82.4%, placing in the 43.0% IV rank vs the trailing year. The 30-day expected move averaged 23.9%. IV traded above realized volatility by 10.9% (HV 20d: 71.5%). Max pain ranged from $27.00 to $34.00. Net GEX was positive for 23 of 23 trading days. Term structure was in contango for 3 of 23 days. Put/call ratio averaged 0.69.

Notable Days

2025-10-10: Highest Volume — 5,151 contracts
2025-10-10: Largest IV spike — 44.5% change
2025-10-10: Highest IV Rank — 61.0%
2025-10-15: Largest Expected Move — 26.0%

Monthly Statistics

Metric	Avg	Min	Max	Open	Close
Price	$40.48	$36.68	$43.91	$43.91	$41.41
Max Pain	$29.65	$27.00	$34.00	$32.00	$30.00
ATM IV	82.4%	66.5%	96.2%	72.1%	86.5%
Expected Move	23.9%	20.0%	26.0%	20.7%	24.8%
HV 20d	71.5%	58.3%	81.5%	58.3%	65.7%
HV 60d	77.1%	71.5%	80.2%	73.1%	71.5%
IV Rank	43.0%	22.3%	61.0%	29.6%	48.4%
IV Percentile	82.3%	59.9%	95.6%	70.2%	86.9%
Term Structure	-8.6%	-18.7%	11.9%	7.5%	-10.8%
VWIV	83.8%	70.6%	89.5%	72.5%	87.4%
Skew 25d	-0.1%	-8.5%	13.7%	-5.2%	4.4%
Skew 10d	-0.4%	-16.6%	24.1%	-4.8%	18.1%
Call IV 25d	84.6%	74.4%	97.5%	77.0%	86.4%
Put IV 25d	84.5%	68.4%	93.8%	71.8%	90.8%
Bid-Ask Spread %	53.10	43.23	69.90	61.36	63.74
Gamma HHI	0.11	0.09	0.18	0.10	0.10
Net GEX	1.3M	819.8K	1.9M	1.5M	1.1M
Net DEX	-105.7M	-145.7M	-77.3M	-145.7M	-100.8M
Net VEX	-313.3K	-332.5K	-299.5K	-301.5K	-306.8K
Div Yield	0.0%	0.0%	0.0%	0.0%	0.0%
P/C Ratio	0.69	0.04	1.91	0.21	1.41
Total Volume	1,712.217	323	5,151	3,699	323
Total OI	74,861.174	66,931	84,169	72,534	71,751

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 Wall	Put Wall	Call Vol	Put Vol	Call OI	Put OI
2025-10-01	$43.91	$32.00	72.1%	20.7%	58.3%	29.6%	72.5%	-5.2%	7.5%	1.5M	-145.7M	-301.5K	0.21	61.36	N/A	N/A	3,059	640	44,770	27,764
2025-10-02	$43.86	$33.00	71.7%	20.6%	58.7%	29.1%	72.0%	-6.5%	11.9%	1.6M	-145.4M	-318.0K	1.78	59.27	N/A	N/A	1,560	2,781	46,150	28,539
2025-10-03	$41.51	$34.00	69.9%	20.0%	65.1%	26.7%	70.6%	-6.0%	7.8%	1.6M	-124.0M	-332.5K	0.61	52.11	N/A	N/A	1,096	667	46,422	30,169
2025-10-06	$42.00	$27.00	73.9%	23.2%	63.9%	32.0%	81.3%	-8.2%	-7.9%	1.6M	-128.7M	-322.7K	0.93	43.83	N/A	N/A	372	347	46,691	30,512
2025-10-07	$40.75	$27.00	73.0%	23.0%	66.4%	30.8%	83.3%	-6.7%	-8.5%	1.6M	-116.3M	-318.9K	0.04	45.77	N/A	N/A	2,102	93	46,766	30,605
2025-10-08	$41.83	$28.00	70.4%	23.2%	66.3%	27.3%	83.3%	-7.7%	-8.8%	1.8M	-128.4M	-314.7K	0.12	44.40	N/A	N/A	1,164	140	48,246	30,651
2025-10-09	$41.27	$28.00	66.5%	22.8%	64.6%	22.3%	81.4%	-8.5%	-8.2%	1.9M	-123.1M	-325.6K	0.49	43.23	N/A	N/A	361	177	48,852	30,651
2025-10-10	$36.68	$28.00	96.2%	23.9%	79.9%	61.0%	86.6%	-7.3%	-10.3%	1.2M	-80.1M	-319.2K	1.44	58.18	N/A	N/A	2,109	3,042	48,677	30,628
2025-10-13	$38.76	$29.00	90.5%	24.7%	81.4%	53.6%	86.5%	-1.4%	-12.7%	1.4M	-97.4M	-317.2K	0.09	48.47	N/A	N/A	1,495	135	48,673	32,792
2025-10-14	$38.36	$29.00	86.3%	24.8%	81.5%	48.1%	87.8%	1.7%	-16.1%	1.4M	-93.2M	-311.4K	1.80	49.07	N/A	N/A	419	753	49,112	32,897
2025-10-15	$39.15	$29.00	90.5%	26.0%	76.6%	53.6%	89.5%	5.2%	-18.7%	1.5M	-95.8M	-320.5K	0.48	51.09	N/A	N/A	815	392	49,182	33,517
2025-10-16	$39.39	$29.00	89.9%	25.8%	73.3%	52.8%	89.2%	13.7%	-15.4%	1.5M	-100.3M	-311.4K	0.04	48.84	N/A	N/A	4,635	181	49,087	33,791
2025-10-17	$38.03	$29.00	88.1%	25.3%	74.6%	50.5%	86.7%	5.0%	-11.9%	1.1M	-89.4M	-318.3K	0.29	48.76	N/A	N/A	759	220	50,392	33,777
2025-10-20	$39.78	$30.00	85.2%	24.4%	75.9%	46.7%	86.4%	3.1%	-13.6%	873.9K	-90.8M	-310.5K	0.36	48.48	N/A	N/A	712	259	38,154	28,777
2025-10-21	$38.63	$30.00	83.7%	24.0%	73.2%	44.8%	84.6%	0.9%	-10.2%	877.4K	-85.0M	-307.0K	1.91	44.76	N/A	N/A	252	481	38,425	28,989
2025-10-22	$37.89	$30.00	85.6%	24.5%	73.5%	47.2%	84.4%	2.6%	-13.1%	819.8K	-77.3M	-312.2K	0.79	53.88	N/A	N/A	375	295	38,588	29,399
2025-10-23	$40.37	$30.00	83.7%	24.0%	76.5%	44.7%	84.0%	5.9%	-9.0%	898.7K	-92.3M	-313.2K	0.10	56.74	N/A	N/A	488	47	38,775	29,648
2025-10-24	$42.06	$30.00	82.7%	23.7%	77.5%	43.4%	83.4%	3.9%	-9.9%	993.9K	-104.3M	-302.7K	0.24	58.14	N/A	N/A	794	191	39,050	29,685
2025-10-27	$42.16	$30.00	84.8%	24.3%	77.4%	46.1%	85.8%	0.6%	-6.3%	998.1K	-107.8M	-301.0K	0.56	56.65	N/A	N/A	1,708	951	39,252	29,821
2025-10-28	$40.64	$30.00	87.4%	25.1%	78.4%	49.6%	86.0%	2.7%	-11.8%	1.0M	-98.9M	-314.4K	0.27	54.10	N/A	N/A	284	78	40,344	29,801
2025-10-29	$41.78	$30.00	90.1%	25.8%	67.8%	53.0%	88.8%	1.4%	-12.0%	1.1M	-107.6M	-299.5K	1.25	69.90	N/A	N/A	907	1,137	40,516	29,854
2025-10-30	$40.79	$30.00	86.3%	24.7%	68.2%	48.1%	86.7%	4.5%	-10.3%	1.0M	-98.4M	-306.4K	0.56	60.59	N/A	N/A	376	209	40,729	30,936
2025-10-31	$41.41	$30.00	86.5%	24.8%	65.7%	48.4%	87.4%	4.4%	-10.8%	1.1M	-100.8M	-306.8K	1.41	63.74	N/A	N/A	134	189	40,752	30,999