ACMR Options History — December 2025

In December 2025, ACMR traded between $32.89 and $41.22. ATM implied volatility averaged 68.2%, placing in the 24.5% IV rank vs the trailing year. The 30-day expected move averaged 19.7%. IV traded above realized volatility by 12.7% (HV 20d: 55.5%). Max pain ranged from $30.00 to $33.00. Net GEX was positive for 22 of 22 trading days. Term structure was in contango for 7 of 22 days. Put/call ratio averaged 0.33.

Notable Days

  • 2025-12-19: Highest Volume — 9,293 contracts
  • 2025-12-30: Largest IV drop — 16.9% change
  • 2025-12-29: Highest IV Rank — 37.0%
  • 2025-12-29: Largest Expected Move — 22.3%

Monthly Statistics

MetricAvgMinMaxOpenClose
Price$37.86$32.89$41.22$33.40$39.73
Max Pain$31.73$30.00$33.00$33.00$32.00
ATM IV68.2%60.8%77.8%67.0%64.9%
Expected Move19.7%18.2%22.3%19.2%18.6%
HV 20d55.5%45.5%93.9%93.9%46.4%
HV 60d75.6%71.4%78.5%77.7%71.4%
IV Rank24.5%14.7%37.0%23.0%20.1%
IV Percentile59.3%33.3%78.6%58.3%43.3%
Term Structure-1.1%-11.4%5.7%-1.6%5.0%
VWIV68.5%57.5%74.3%68.2%66.0%
Skew 25d2.7%-5.5%7.4%0.8%2.3%
Skew 10d8.4%-12.3%35.6%-1.4%11.3%
Call IV 25d69.3%64.3%75.1%69.1%64.8%
Put IV 25d72.0%67.1%77.6%69.9%67.1%
Bid-Ask Spread %64.8553.6074.1959.0574.19
Gamma HHI0.110.080.140.080.12
Net GEX1.3M686.9K2.0M706.6K1.4M
Net DEX-70.4M-91.9M-36.7M-38.1M-79.8M
Net VEX-239.0K-248.6K-226.9K-240.4K-233.2K
Div Yield0.0%0.0%0.0%0.0%0.0%
P/C Ratio0.330.011.050.070.34
Total Volume1,769.4094069,2935081,026
Total OI60,717.95557,02964,19857,02962,557

Daily Data (22 trading days)

DatePriceMax PainATM IVExp MoveHV 20dIV RankVWIVSkew 25dTerm StrGEXDEXVEXP/CSpread %Call WallPut WallCall VolPut VolCall OIPut OI
2025-12-01$33.40$33.0067.0%19.2%93.9%23.0%68.2%0.8%-1.6%706.6K-38.1M-240.4K0.0759.05N/AN/A4743434,25322,776
2025-12-02$32.89$33.0066.0%18.9%93.9%21.6%68.3%-0.6%-0.0%686.9K-36.7M-235.9K0.3962.15N/AN/A37814634,55522,774
2025-12-03$33.89$33.0066.5%19.1%92.5%22.3%66.1%5.6%-1.4%754.7K-39.3M-238.9K0.4266.74N/AN/A34614434,65622,912
2025-12-04$34.53$30.0064.7%18.2%51.0%19.8%64.6%4.2%0.3%888.7K-45.6M-239.4K0.8966.83N/AN/A35531534,77222,969
2025-12-05$35.03$30.0060.8%18.3%51.1%14.7%64.4%3.8%-1.5%987.1K-48.6M-241.7K0.3168.31N/AN/A38711934,98122,963
2025-12-08$36.69$30.0064.9%19.9%52.8%20.2%67.1%0.8%-2.1%1.2M-65.9M-226.9K0.1467.20N/AN/A1,65423335,14223,048
2025-12-09$36.66$30.0067.6%19.7%48.4%23.7%68.7%-0.3%-0.9%1.2M-61.9M-235.7K0.4864.04N/AN/A1,42968636,15223,165
2025-12-10$39.77$31.0067.9%19.5%54.7%24.0%69.4%2.9%2.4%1.5M-84.4M-248.0K0.1462.71N/AN/A94913237,02123,493
2025-12-11$39.72$32.0068.8%19.7%53.8%25.3%57.5%7.2%1.6%1.5M-85.1M-244.1K0.1660.80N/AN/A74912137,54623,486
2025-12-12$38.92$32.0067.4%19.3%53.2%23.5%67.8%2.0%0.0%1.6M-80.2M-240.6K0.1361.59N/AN/A2,18429137,56823,541
2025-12-15$37.66$32.0068.8%19.7%51.4%25.3%72.2%-1.5%1.5%1.6M-71.5M-239.1K0.6161.89N/AN/A25215439,06023,770
2025-12-16$36.98$32.0068.4%19.6%52.3%24.7%69.4%3.0%-2.3%1.6M-64.8M-231.8K0.1461.10N/AN/A6048339,05123,857
2025-12-17$37.48$32.0069.6%20.0%51.6%26.3%74.3%4.7%-1.6%1.9M-68.8M-234.1K1.0564.29N/AN/A1,8771,97439,41123,891
2025-12-18$37.80$32.0070.4%20.2%51.5%27.4%69.2%3.1%-2.2%2.0M-74.6M-236.1K0.0660.09N/AN/A8245040,50123,494
2025-12-19$39.58$32.0069.4%19.9%45.6%26.0%67.5%4.7%-3.0%904.8K-91.3M-233.2K0.0166.10N/AN/A9,18810540,69523,503
2025-12-22$41.22$32.0073.3%21.0%46.5%31.1%72.9%4.0%-3.8%1.2M-91.9M-240.1K0.3753.60N/AN/A3,6711,35136,73322,072
2025-12-23$39.87$32.0071.0%20.4%46.0%28.2%73.1%2.8%-4.1%1.3M-82.1M-247.2K0.4663.71N/AN/A73833738,80522,379
2025-12-24$40.28$32.0068.0%19.5%45.5%24.2%68.9%3.1%-1.1%1.4M-83.8M-248.6K0.2464.93N/AN/A3538538,95422,602
2025-12-26$40.79$32.0073.5%21.1%45.5%31.4%72.2%5.4%-4.6%1.4M-88.1M-247.9K0.2271.40N/AN/A72116139,05922,667
2025-12-29$39.94$32.0077.8%22.3%46.7%37.0%73.5%7.4%-11.4%1.4M-80.9M-238.8K0.3873.24N/AN/A72227739,48222,806
2025-12-30$40.14$32.0064.7%18.5%46.7%19.9%64.8%-5.5%5.7%1.6M-85.8M-235.9K0.1972.81N/AN/A2,73651239,66223,011
2025-12-31$39.73$32.0064.9%18.6%46.4%20.1%66.0%2.3%5.0%1.4M-79.8M-233.2K0.3474.19N/AN/A76426239,33423,223