BMAX Options History — August 2025 In August 2025, BMAX traded between $27.48 and $32.13. ATM implied volatility averaged 51.3%. The 30-day expected move averaged 11.8%. IV traded above realized volatility by 6.4% (HV 20d: 44.9%). Net GEX was positive for 18 of 21 trading days. Term structure was in contango for 4 of 21 days. Put/call ratio averaged 0.00.
Notable Days 2025-08-26 : Highest Volume — 241 contracts2025-08-08 : Largest IV spike — 57.0% change2025-08-01 : Largest Expected Move — 17.0%Monthly Statistics Metric Avg Min Max Open Close Price $28.94 $27.48 $32.13 $29.25 $27.57 ATM IV 51.3% 34.9% 97.2% 59.3% 37.1% Expected Move 11.8% 10.0% 17.0% 17.0% 10.6% HV 20d 44.9% 27.1% 54.5% 27.1% 54.5% HV 60d 39.6% 35.5% 43.8% 36.3% 37.8% Term Structure -3.8% -18.2% 4.7% -18.2% -8.4% Skew 25d 3.4% -2.9% 12.0% 5.3% -2.9% Skew 10d 8.0% -4.7% 31.1% 6.9% -0.3% Call IV 25d 39.8% 21.9% 59.3% 59.3% 28.8% Put IV 25d 43.2% 23.8% 64.6% 64.6% 25.9% Bid-Ask Spread % 148.56 134.49 156.60 156.60 134.49 Gamma HHI 0.41 0.27 0.59 0.31 0.55 Net GEX 429 -715 919 391 -474 Net DEX -7.1K -20.1K 35.1K -12.0K 35.1K Net VEX -96 -338 -40 -56 -323 Div Yield 0.0% 0.0% 0.0% 0.0% 0.0% P/C Ratio 0.00 0.00 0.00 0.00 0.00 Total Volume 12.381 0 241 0 0 Total OI 18.286 11 46 11 46
Daily Data (21 trading days) Date Price Max Pain ATM IV Exp Move HV 20d IV Rank VWIV Skew 25d Term Str GEX DEX VEX P/C Spread % Call Wall Put Wall Call Vol Put Vol Call OI Put OI 2025-08-01 $29.25 $0.00 59.3% 17.0% 27.1% 0.0% 0.0% 5.3% -18.2% 391 -12.0K -56 0.00 156.60 N/A N/A 0 0 10 1 2025-08-04 $29.45 $0.00 58.5% 11.1% 27.2% 0.0% 0.0% 3.7% -2.8% 412 -11.6K -51 0.00 152.57 N/A N/A 0 0 10 1 2025-08-05 $28.75 $0.00 59.0% 11.0% 28.4% 0.0% 0.0% 2.7% -2.6% 373 -9.9K -46 0.00 151.87 N/A N/A 0 0 10 1 2025-08-06 $29.25 $0.00 60.2% 10.9% 29.2% 0.0% 0.0% 2.7% -1.7% 406 -11.1K -50 0.00 151.81 N/A N/A 0 0 10 1 2025-08-07 $30.15 $0.00 61.9% 10.8% 31.1% 0.0% 0.0% 4.9% -3.6% 444 -13.3K -54 0.00 152.03 N/A N/A 0 0 10 1 2025-08-08 $32.13 $0.00 97.2% 12.7% 36.9% 0.0% 0.0% -2.0% -1.6% 308 -17.2K -63 0.00 147.99 N/A N/A 0 0 10 1 2025-08-11 $29.70 $0.00 85.0% 11.1% 45.2% 0.0% 0.0% 2.9% 0.5% 422 -11.3K -50 0.00 152.16 N/A N/A 2 0 10 1 2025-08-12 $29.45 $0.00 66.7% 10.9% 45.2% 0.0% 0.0% 0.1% 3.4% 580 -13.8K -58 0.00 148.04 N/A N/A 2 0 12 1 2025-08-13 $30.10 $0.00 39.4% 11.3% 45.1% 0.0% 0.0% 1.9% -1.5% 919 -18.2K -68 0.00 151.42 N/A N/A 0 0 14 1 2025-08-14 $30.64 $0.00 42.9% 12.3% 45.7% 0.0% 0.0% 9.2% 4.7% 898 -20.1K -69 0.00 154.82 N/A N/A 1 0 14 1 2025-08-15 $28.48 $0.00 41.9% 12.0% 51.9% 0.0% 0.0% 10.4% -3.1% 707 -15.3K -66 0.00 151.09 N/A N/A 0 0 15 1 2025-08-18 $28.73 $0.00 39.6% 11.4% 51.9% 0.0% 0.0% 2.8% 4.6% 745 -15.6K -66 0.00 147.13 N/A N/A 0 0 15 1 2025-08-19 $27.88 $0.00 41.3% 11.8% 52.2% 0.0% 0.0% 12.0% -4.8% 660 -13.8K -59 0.00 147.72 N/A N/A 0 0 15 1 2025-08-20 $27.84 $0.00 40.4% 11.6% 51.8% 0.0% 0.0% 3.1% -3.7% 702 -13.7K -61 0.00 146.03 N/A N/A 0 0 15 1 2025-08-21 $27.59 $0.00 42.8% 12.3% 51.0% 0.0% 0.0% 5.2% -5.7% 627 -12.9K -56 0.00 149.24 N/A N/A 0 0 15 1 2025-08-22 $28.52 $0.00 44.9% 12.9% 52.8% 0.0% 0.0% 2.5% -5.6% 775 -14.2K -59 0.00 154.19 N/A N/A 0 0 15 1 2025-08-25 $28.20 $0.00 43.9% 12.6% 52.8% 0.0% 0.0% 3.3% -5.9% 747 -14.5K -58 0.00 149.77 N/A N/A 2 0 15 1 2025-08-26 $27.48 $0.00 42.5% 12.2% 53.3% 0.0% 0.0% -1.8% -11.4% 522 -9.4K -40 0.00 141.30 N/A N/A 0 241 13 1 2025-08-27 $28.29 $0.00 38.1% 10.9% 54.5% 0.0% 0.0% 1.8% -7.1% -448 30.2K -338 0.00 143.31 N/A N/A 0 12 13 33 2025-08-28 $28.20 $0.00 34.9% 10.0% 54.5% 0.0% 0.0% 3.0% -6.1% -715 33.2K -334 0.00 136.29 N/A N/A 0 0 13 33 2025-08-29 $27.57 $0.00 37.1% 10.6% 54.5% 0.0% 0.0% -2.9% -8.4% -474 35.1K -323 0.00 134.49 N/A N/A 0 0 13 33
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