CORN Options History — December 2025

In December 2025, CORN traded between $17.57 and $18.07. ATM implied volatility averaged 20.1%, placing in the 21.1% IV rank vs the trailing year. The 30-day expected move averaged 5.6%. IV traded above realized volatility by 7.2% (HV 20d: 12.9%). Max pain ranged from $17.00 to $18.00. Net GEX was positive for 22 of 22 trading days. Term structure was in contango for 5 of 22 days. Put/call ratio averaged 0.11.

Notable Days

  • 2025-12-03: Highest Volume — 1,621 contracts
  • 2025-12-02: Largest IV spike — 86.0% change
  • 2025-12-29: Highest IV Rank — 32.8%
  • 2025-12-29: Largest Expected Move — 7.3%

Monthly Statistics

MetricAvgMinMaxOpenClose
Price$17.85$17.57$18.07$17.91$17.73
Max Pain$17.27$17.00$18.00$18.00$18.00
ATM IV20.1%10.4%25.4%10.4%22.6%
Expected Move5.6%3.0%7.3%3.0%6.5%
HV 20d12.9%9.8%15.8%15.3%10.6%
HV 60d11.9%11.6%12.3%12.0%12.0%
IV Rank21.1%0.0%32.8%0.0%26.6%
IV Percentile58.5%0.0%95.2%0.0%81.7%
Term Structure-0.8%-6.0%12.3%12.3%-1.0%
VWIV20.1%10.4%40.2%10.4%17.5%
Skew 25d5.2%-7.4%17.2%8.8%3.7%
Skew 10d16.8%2.4%73.9%16.5%73.9%
Call IV 25d20.3%11.6%28.8%12.0%22.6%
Put IV 25d25.5%13.5%31.8%20.8%26.3%
Bid-Ask Spread %109.3399.21114.75105.58111.77
Gamma HHI0.340.300.440.440.31
Net GEX386.0K263.2K480.4K263.2K392.2K
Net DEX-4.8M-5.7M-2.7M-2.7M-4.5M
Net VEX-17.7K-20.2K-14.0K-14.0K-16.2K
Div Yield0.0%0.0%0.0%0.0%0.0%
P/C Ratio0.110.001.420.140.05
Total Volume228301,62197171
Total OI6,753.9554,8267,3234,8267,161

Daily Data (22 trading days)

DatePriceMax PainATM IVExp MoveHV 20dIV RankVWIVSkew 25dTerm StrGEXDEXVEXP/CSpread %Call WallPut WallCall VolPut VolCall OIPut OI
2025-12-01$17.91$18.0010.4%3.0%15.3%0.0%10.4%8.8%12.3%263.2K-2.7M-14.0K0.14105.58N/AN/A85124,356470
2025-12-02$18.05$18.0019.3%5.5%15.2%19.4%17.9%17.2%-1.6%273.2K-3.0M-14.2K0.00105.52N/AN/A9004,391482
2025-12-03$17.81$18.0013.3%3.8%15.8%6.3%13.3%8.8%3.7%273.3K-2.9M-14.2K0.03105.69N/AN/A1,571504,416482
2025-12-04$17.88$17.0020.1%5.5%15.6%21.1%19.3%0.3%1.1%319.3K-4.8M-19.5K0.00112.95N/AN/A30605,993536
2025-12-05$17.84$17.0022.7%5.5%15.0%26.8%0.0%0.9%-0.6%338.2K-5.2M-20.0K0.00114.71N/AN/A9406,262536
2025-12-08$17.84$17.0021.9%5.8%14.9%25.0%40.2%9.4%-0.8%347.2K-5.2M-19.6K0.00113.39N/AN/A52806,324536
2025-12-09$17.96$17.0023.7%5.4%14.9%29.0%0.0%0.4%1.9%419.5K-5.6M-20.2K0.00112.78N/AN/A5606,787536
2025-12-10$17.84$17.0017.1%4.9%14.9%14.6%17.9%0.4%2.0%430.3K-5.4M-20.0K0.00114.75N/AN/A10606,780536
2025-12-11$17.92$17.0019.6%5.6%15.0%20.0%20.0%7.7%-2.8%464.9K-5.7M-19.2K0.44109.52N/AN/A71316,721536
2025-12-12$17.76$17.0020.3%5.8%14.1%21.6%0.0%0.4%-5.7%438.8K-5.1M-19.2K0.04113.82N/AN/A13856,716558
2025-12-15$17.70$17.0022.4%6.4%11.8%26.1%22.8%-0.7%-2.8%426.9K-4.7M-18.5K0.00110.85N/AN/A21006,656553
2025-12-16$17.57$17.0017.8%5.1%11.6%16.3%19.9%8.7%-1.7%418.9K-4.5M-17.9K0.00108.14N/AN/A24506,688553
2025-12-17$17.71$17.0020.3%5.8%12.1%21.6%20.9%7.6%-2.6%442.8K-4.5M-17.4K0.03108.63N/AN/A2916,623498
2025-12-18$17.81$17.0018.0%5.1%11.1%16.5%17.2%8.2%-2.0%480.4K-5.0M-17.4K0.01110.82N/AN/A6716,634496
2025-12-19$17.79$17.0020.6%5.9%10.8%22.4%20.9%0.5%-1.5%367.7K-4.8M-17.4K1.42111.19N/AN/A31446,745496
2025-12-22$17.89$17.0021.8%6.2%11.0%24.8%22.0%-7.4%-2.2%379.7K-5.1M-17.4K0.1399.21N/AN/A248336,173496
2025-12-23$17.94$17.0022.7%6.5%11.0%26.8%22.7%6.2%-2.7%387.4K-5.3M-17.6K0.01106.85N/AN/A14616,335525
2025-12-24$18.06$17.0020.7%5.9%11.2%22.5%17.3%14.2%-3.1%419.3K-5.7M-17.5K0.00106.48N/AN/A8006,371526
2025-12-26$18.07$17.0020.1%5.8%9.8%21.1%22.0%3.9%-0.0%375.0K-5.6M-17.7K0.03104.07N/AN/A314106,373526
2025-12-29$17.81$18.0025.4%7.3%11.0%32.8%17.5%14.1%-6.0%435.9K-5.1M-17.6K0.01106.21N/AN/A19526,528536
2025-12-30$17.73$18.0020.9%6.0%11.1%23.0%0.0%1.9%-2.4%398.8K-4.8M-16.5K0.00112.40N/AN/A4506,603538
2025-12-31$17.73$18.0022.6%6.5%10.6%26.6%0.0%3.7%-1.0%392.2K-4.5M-16.2K0.05111.77N/AN/A16386,623538