ACMR Options History — September 2025

In September 2025, ACMR traded between $26.70 and $39.29. ATM implied volatility averaged 60.3%, placing in the 14.2% IV rank vs the trailing year. The 30-day expected move averaged 17.2%. IV traded below realized volatility by 16.9% (HV 20d: 77.2%). Max pain ranged from $27.00 to $32.00. Net GEX was positive for 21 of 21 trading days. Term structure was in contango for 19 of 21 days. Put/call ratio averaged 0.65.

Notable Days

  • 2025-09-17: Highest Volume — 19,188 contracts
  • 2025-09-17: Largest IV spike — 14.2% change
  • 2025-09-24: Highest IV Rank — 24.2%
  • 2025-09-24: Largest Expected Move — 19.5%

Monthly Statistics

MetricAvgMinMaxOpenClose
Price$32.65$26.70$39.29$27.55$39.29
Max Pain$28.57$27.00$32.00$27.00$32.00
ATM IV60.3%53.5%68.0%56.0%65.3%
Expected Move17.2%15.1%19.5%16.1%18.7%
HV 20d77.2%51.9%101.0%101.0%51.9%
HV 60d68.1%65.9%70.0%66.7%69.9%
IV Rank14.2%5.3%24.2%8.6%20.6%
IV Percentile36.7%8.7%64.3%17.5%55.6%
Term Structure6.9%-2.5%10.9%-2.5%8.0%
VWIV61.4%53.3%72.0%56.3%66.9%
Skew 25d-1.9%-7.0%1.6%-0.8%-7.0%
Skew 10d-0.2%-10.7%26.5%4.0%-10.7%
Call IV 25d62.5%53.3%72.4%57.6%71.4%
Put IV 25d60.7%54.3%69.1%56.8%64.4%
Bid-Ask Spread %49.3733.1769.2367.1949.48
Gamma HHI0.110.080.240.080.11
Net GEX1.0M288.7K2.4M376.7K1.6M
Net DEX-60.1M-106.9M-16.1M-21.7M-106.9M
Net VEX-280.5K-334.7K-240.1K-252.7K-326.4K
Div Yield0.0%0.0%0.0%0.0%0.0%
P/C Ratio0.650.064.390.070.13
Total Volume4,024.28632019,1882,4982,136
Total OI67,147.28663,32276,13563,37173,085

Daily Data (21 trading days)

DatePriceMax PainATM IVExp MoveHV 20dIV RankVWIVSkew 25dTerm StrGEXDEXVEXP/CSpread %Call WallPut WallCall VolPut VolCall OIPut OI
2025-09-02$27.55$27.0056.0%16.1%101.0%8.6%56.3%-0.8%-2.5%376.7K-21.7M-252.7K0.0767.19N/AN/A2,32517334,90528,466
2025-09-03$26.70$27.0055.0%15.8%100.9%7.2%55.8%1.1%-1.7%288.7K-16.1M-245.6K1.1269.23N/AN/A49355134,97928,562
2025-09-04$26.87$27.0053.8%15.2%83.7%5.7%53.3%0.8%9.3%296.9K-16.8M-248.9K0.8246.51N/AN/A17614435,12829,018
2025-09-05$27.38$27.0053.9%15.3%81.8%5.8%54.0%-0.2%9.1%405.8K-20.9M-250.6K0.4833.17N/AN/A25112035,14329,104
2025-09-08$26.98$27.0056.1%15.1%81.7%8.7%54.1%1.2%9.4%322.6K-17.6M-242.0K0.3351.26N/AN/A51217135,17529,107
2025-09-09$27.86$27.0057.5%15.5%82.2%10.5%54.6%0.4%7.8%447.1K-22.7M-243.7K0.3656.22N/AN/A45816635,27029,123
2025-09-10$28.09$27.0053.5%15.3%81.5%5.3%54.2%1.3%9.4%482.5K-23.7M-240.1K0.7056.70N/AN/A50035135,39629,230
2025-09-11$30.10$27.0057.1%16.4%84.2%9.9%58.8%-3.3%7.3%844.7K-39.5M-247.5K4.3949.10N/AN/A1,7657,75135,38529,351
2025-09-12$29.77$27.0056.6%16.2%84.4%9.3%56.7%-0.7%7.3%816.9K-36.2M-248.0K0.3752.05N/AN/A47817836,15627,166
2025-09-15$29.97$28.0056.5%16.2%83.8%9.2%57.6%-0.1%6.6%837.4K-37.6M-241.4K2.3650.71N/AN/A4781,12936,28627,231
2025-09-16$30.91$28.0057.7%16.5%84.1%10.7%58.2%-0.6%6.5%1.0M-44.6M-243.2K0.2042.73N/AN/A1,38527836,44427,210
2025-09-17$33.70$28.0065.9%18.9%88.3%21.4%66.6%1.6%4.8%1.5M-68.4M-252.0K0.0941.65N/AN/A17,6141,57437,10527,275
2025-09-18$36.05$29.0064.5%18.5%89.8%19.7%66.3%-2.3%7.2%2.4M-103.3M-294.4K0.0842.04N/AN/A12,24492945,62328,431
2025-09-19$35.99$30.0062.6%17.9%90.1%17.2%65.2%-3.0%8.1%2.3M-101.6M-327.0K0.3343.03N/AN/A3,3941,10647,10329,032
2025-09-22$36.66$30.0064.3%18.4%64.3%19.4%67.2%-5.8%6.9%1.2M-85.5M-331.7K0.1940.99N/AN/A2,05638841,14125,910
2025-09-23$39.11$30.0066.3%19.0%59.4%21.9%67.4%-3.7%7.1%1.3M-105.2M-332.3K0.1350.58N/AN/A7,62096742,30225,997
2025-09-24$38.77$30.0068.0%19.5%59.5%24.2%72.0%-5.2%8.6%1.3M-102.1M-333.0K0.0846.68N/AN/A5,64343743,14026,228
2025-09-25$37.92$30.0068.0%19.5%57.4%24.2%71.0%-3.1%6.3%1.3M-95.3M-333.3K0.3540.84N/AN/A3,0381,05744,07726,420
2025-09-26$37.67$31.0063.5%18.2%57.4%18.3%66.8%-3.9%9.4%1.4M-93.6M-334.7K0.0653.25N/AN/A1,91012144,50126,947
2025-09-29$38.36$31.0064.9%18.6%53.8%20.2%66.7%-6.0%10.9%1.5M-102.0M-322.4K0.9253.40N/AN/A1,2741,16944,96626,975
2025-09-30$39.29$32.0065.3%18.7%51.9%20.6%66.9%-7.0%8.0%1.6M-106.9M-326.4K0.1349.48N/AN/A1,89324345,38827,697