CORN Options History — August 2025

In August 2025, CORN traded between $16.73 and $17.58. ATM implied volatility averaged 18.9%, placing in the 20.0% IV rank vs the trailing year. The 30-day expected move averaged 4.9%. IV traded above realized volatility by 5.6% (HV 20d: 13.4%). Max pain ranged from $16.00 to $18.00. Net GEX was positive for 21 of 21 trading days. Term structure was in contango for 8 of 21 days. Put/call ratio averaged 0.23.

Notable Days

  • 2025-08-12: Highest Volume — 893 contracts
  • 2025-08-11: Largest IV spike — 34.9% change
  • 2025-08-11: Highest IV Rank — 44.1%
  • 2025-08-01: Largest Expected Move — 6.0%

Monthly Statistics

MetricAvgMinMaxOpenClose
Price$17.09$16.73$17.58$17.21$17.58
Max Pain$16.90$16.00$18.00$18.00$17.00
ATM IV18.9%15.2%30.2%20.9%18.1%
Expected Move4.9%4.1%6.0%6.0%5.2%
HV 20d13.4%11.5%16.2%16.2%15.8%
HV 60d15.8%15.3%16.4%15.3%16.4%
IV Rank20.0%12.0%44.1%24.2%18.2%
IV Percentile43.0%15.5%97.2%65.1%38.1%
Term Structure0.1%-6.6%20.1%20.1%-0.5%
VWIV17.2%11.4%27.0%17.5%17.7%
Skew 25d0.5%-5.0%9.0%4.7%-0.3%
Skew 10d2.1%-10.7%12.4%4.2%11.9%
Call IV 25d16.1%10.3%22.2%18.2%17.2%
Put IV 25d16.7%12.6%22.9%22.9%17.0%
Bid-Ask Spread %99.8693.76106.98102.0998.50
Gamma HHI0.440.250.620.260.51
Net GEX82.4K22.4K137.0K44.5K137.0K
Net DEX-630.5K-1.6M97.3K-69.4K-1.6M
Net VEX-6.3K-8.9K-3.4K-3.9K-8.9K
Div Yield0.0%0.0%0.0%0.0%0.0%
P/C Ratio0.230.011.180.280.41
Total Volume241.5242389323391
Total OI7,317.0482,78412,13510,6583,145

Daily Data (21 trading days)

DatePriceMax PainATM IVExp MoveHV 20dIV RankVWIVSkew 25dTerm StrGEXDEXVEXP/CSpread %Call WallPut WallCall VolPut VolCall OIPut OI
2025-08-01$17.21$18.0020.9%6.0%16.2%24.2%17.5%4.7%20.1%44.5K-69.4K-3.9K0.28102.09N/AN/A18510,140518
2025-08-04$17.10$17.0021.2%5.1%11.8%24.8%27.0%1.3%-2.4%31.5K24.2K-3.6K0.05106.98N/AN/A2061110,155513
2025-08-05$16.91$17.0021.8%5.1%11.7%26.2%22.4%-5.0%-3.2%22.9K97.3K-3.4K0.12106.57N/AN/A69810,358505
2025-08-06$16.91$17.0020.9%5.0%11.6%24.2%19.4%0.9%-2.1%22.4K58.2K-3.5K0.11100.56N/AN/A1011110,426510
2025-08-07$17.08$17.0020.3%5.2%12.3%22.8%18.0%-3.4%-3.0%28.2K-67.8K-3.8K0.0198.67N/AN/A81110,461507
2025-08-08$17.02$17.0022.4%4.9%12.1%27.4%17.5%-4.1%-4.3%33.6K-138.3K-3.8K0.5599.22N/AN/A382110,540486
2025-08-11$17.13$16.0030.2%4.1%11.5%44.1%17.6%3.7%3.9%41.0K-208.3K-4.0K0.03103.72N/AN/A71210,576483
2025-08-12$16.73$17.0022.9%4.8%14.0%28.4%16.0%-0.5%-0.6%33.7K19.9K-3.6K0.27102.21N/AN/A70319010,624485
2025-08-13$16.77$17.0017.0%4.9%13.5%15.9%11.4%-0.7%-0.2%56.2K-263.7K-5.8K0.01103.27N/AN/A341411,312557
2025-08-14$16.82$17.0016.8%4.8%13.6%15.4%17.6%-0.3%-6.6%73.3K-402.1K-6.4K0.3498.35N/AN/A381311,565565
2025-08-15$17.05$16.0016.2%4.7%13.4%14.2%16.1%9.0%0.8%86.7K-751.3K-7.0K0.2997.80N/AN/A43412711,596539
2025-08-18$17.09$16.0018.3%5.2%13.0%18.6%17.8%-1.0%-3.0%119.5K-1.0M-7.9K0.2793.76N/AN/A297812,522313
2025-08-19$16.98$17.0016.2%4.7%13.0%14.2%15.9%-2.6%0.1%115.1K-904.4K-8.1K0.3194.78N/AN/A39122,631388
2025-08-20$17.06$17.0016.2%4.6%13.2%14.1%16.0%-1.5%-0.2%120.8K-973.1K-8.3K0.10100.13N/AN/A452452,666395
2025-08-21$17.32$17.0016.0%4.6%14.2%13.6%16.4%-1.5%0.0%113.6K-1.1M-7.9K0.1196.18N/AN/A339372,377407
2025-08-22$17.30$17.0015.2%4.4%14.2%12.0%14.9%-0.8%2.1%126.6K-1.2M-8.4K0.1199.09N/AN/A174192,493416
2025-08-25$17.34$17.0016.8%4.8%13.8%15.3%15.9%4.0%-0.2%125.3K-1.2M-8.2K0.1197.84N/AN/A285302,516429
2025-08-26$17.23$17.0017.4%5.0%13.8%16.6%16.8%-0.2%-0.2%130.8K-1.2M-8.8K0.1799.16N/AN/A138232,666452
2025-08-27$17.12$17.0016.6%4.8%14.0%14.9%15.1%3.7%0.7%133.6K-1.1M-8.4K1.1898.32N/AN/A44522,741459
2025-08-28$17.24$17.0016.2%4.6%14.2%14.1%14.9%5.7%0.7%133.6K-1.2M-8.7K0.0699.92N/AN/A11472,741480
2025-08-29$17.58$17.0018.1%5.2%15.8%18.2%17.7%-0.3%-0.5%137.0K-1.6M-8.9K0.4198.50N/AN/A2771142,667478