BMAX Options History — September 2025

In September 2025, BMAX traded between $27.73 and $29.89. ATM implied volatility averaged 38.1%. The 30-day expected move averaged 10.2%. IV traded below realized volatility by 14.8% (HV 20d: 52.9%). Max pain ranged from $16.00 to $16.00. Net GEX was positive for 1 of 21 trading days. Term structure was in contango for 0 of 21 days. Put/call ratio averaged 0.67.

Notable Days

  • 2025-09-05: Highest Volume — 3 contracts
  • 2025-09-10: Largest IV drop — 32.6% change
  • 2025-09-02: Largest Expected Move — 15.2%

Monthly Statistics

MetricAvgMinMaxOpenClose
Price$28.49$27.73$29.89$29.89$28.55
Max Pain$16.00$16.00$16.00$16.00$16.00
ATM IV38.1%30.8%53.1%53.1%39.4%
Expected Move10.2%8.0%15.2%15.2%11.3%
HV 20d52.9%39.0%66.3%62.1%39.0%
HV 60d43.5%41.2%44.4%41.2%44.4%
Term Structure-6.9%-12.6%-1.4%-7.2%-3.9%
VWIV83.5%83.5%83.5%83.5%83.5%
Skew 25d2.7%-18.9%37.3%-18.9%-0.6%
Skew 10d3.9%-11.5%65.7%-11.5%-2.1%
Call IV 25d37.6%26.0%65.8%65.8%47.1%
Put IV 25d40.3%28.6%72.9%46.9%46.6%
Bid-Ask Spread %136.59129.71142.32136.89138.69
Gamma HHI0.500.430.620.560.45
Net GEX-450-85038-483-240
Net DEX35.4K19.9K46.7K19.9K41.6K
Net VEX-337-356-303-350-321
Div Yield0.0%0.0%0.0%0.0%0.0%
P/C Ratio0.670.002.002.000.00
Total Volume0.2380300
Total OI4946504650

Daily Data (21 trading days)

DatePriceMax PainATM IVExp MoveHV 20dIV RankVWIVSkew 25dTerm StrGEXDEXVEXP/CSpread %Call WallPut WallCall VolPut VolCall OIPut OI
2025-09-02$29.89$0.0053.1%15.2%62.1%0.0%0.0%-18.9%-7.2%-48319.9K-3500.00136.89N/AN/A001333
2025-09-03$27.94$0.0036.9%10.6%66.2%0.0%0.0%-5.3%-9.4%-80443.0K-3030.00134.56N/AN/A001333
2025-09-04$28.51$16.0040.7%8.0%66.3%0.0%0.0%-4.2%-11.9%-25532.9K-3300.00129.71N/AN/A001333
2025-09-05$27.73$16.0040.7%8.7%65.8%0.0%0.0%3.3%-6.7%-68837.2K-3112.00134.22N/AN/A121333
2025-09-08$28.41$16.0044.5%8.6%61.8%0.0%0.0%5.7%-4.4%-85046.7K-3180.00130.89N/AN/A001435
2025-09-09$28.04$16.0048.6%9.3%55.7%0.0%0.0%5.1%-6.0%-65136.9K-3430.00138.68N/AN/A001435
2025-09-10$27.91$16.0032.8%9.4%55.7%0.0%83.5%2.3%-7.4%-54338.0K-3390.00138.96N/AN/A101435
2025-09-11$27.91$16.0031.8%9.1%54.9%0.0%0.0%2.1%-6.3%-56837.9K-3390.00135.64N/AN/A001435
2025-09-12$28.41$16.0032.2%9.2%54.9%0.0%0.0%2.5%-6.4%-57234.3K-3430.00137.68N/AN/A101435
2025-09-15$28.40$16.0034.4%9.9%48.4%0.0%0.0%7.2%-7.5%-57533.5K-3490.00138.63N/AN/A001535
2025-09-16$28.69$16.0030.8%8.8%48.5%0.0%0.0%9.0%-12.6%-39533.2K-3540.00134.35N/AN/A001535
2025-09-17$28.22$16.0034.2%9.8%47.6%0.0%0.0%3.5%-9.1%-54035.4K-3420.00132.93N/AN/A001535
2025-09-18$29.19$16.0036.8%10.6%49.0%0.0%0.0%-0.8%-6.4%-47428.3K-3560.00142.32N/AN/A001535
2025-09-19$29.21$16.0034.3%9.8%48.8%0.0%0.0%-1.4%-1.4%-37428.9K-3550.00139.46N/AN/A001535
2025-09-22$29.01$16.0034.0%9.8%47.6%0.0%0.0%-4.2%-4.7%-11231.4K-3490.00136.50N/AN/A001535
2025-09-23$28.35$16.0038.1%10.9%48.1%0.0%0.0%-1.7%-8.8%-40935.2K-3370.00135.46N/AN/A001535
2025-09-24$28.76$16.0034.4%9.9%47.4%0.0%0.0%-2.3%-5.6%-21633.5K-3460.00132.49N/AN/A001535
2025-09-25$28.64$16.0037.5%10.7%46.3%0.0%0.0%37.3%-4.5%3834.9K-3440.00138.16N/AN/A001535
2025-09-26$27.73$16.0042.7%12.2%47.8%0.0%0.0%2.5%-10.6%-46838.3K-3280.00140.42N/AN/A001535
2025-09-29$28.77$16.0042.0%12.0%48.8%0.0%0.0%15.6%-5.1%-26943.0K-3190.00141.84N/AN/A001535
2025-09-30$28.55$16.0039.4%11.3%39.0%0.0%0.0%-0.6%-3.9%-24041.6K-3210.00138.69N/AN/A001535