BMAX Options History — May 2025 In May 2025, BMAX traded between $29.05 and $31.93. ATM implied volatility averaged 50.9%. The 30-day expected move averaged 12.2%. IV traded below realized volatility by 2.5% (HV 20d: 53.4%). Max pain ranged from $27.00 to $27.00. Net GEX was positive for 21 of 21 trading days. Term structure was in contango for 0 of 21 days. Put/call ratio averaged 0.00.
Notable Days 2025-05-19 : Highest Volume — 3 contracts2025-05-28 : Largest IV spike — 63.9% change2025-05-28 : Largest Expected Move — 16.3%Monthly Statistics Metric Avg Min Max Open Close Price $30.43 $29.05 $31.93 $29.44 $29.05 Max Pain $27.00 $27.00 $27.00 $27.00 $27.00 ATM IV 50.9% 34.7% 72.5% 56.2% 36.5% Expected Move 12.2% 9.5% 16.3% 16.1% 10.5% HV 20d 53.4% 42.8% 62.4% 62.4% 53.8% Term Structure -6.5% -17.3% -0.7% -16.7% -5.5% VWIV 24.8% 24.8% 24.8% 24.8% 24.8% Skew 25d 7.9% -10.0% 24.9% -10.0% 1.8% Skew 10d 10.1% -19.7% 34.1% -19.7% 3.7% Call IV 25d 39.7% 22.5% 56.1% 56.1% 40.7% Put IV 25d 47.6% 38.3% 55.2% 46.1% 42.5% Bid-Ask Spread % 142.36 134.75 146.38 134.75 138.91 Gamma HHI 0.38 0.22 0.74 0.45 0.39 Net GEX 354 84 629 256 531 Net DEX -11.8K -19.4K -6.1K -6.7K -12.3K Net VEX -29 -60 -12 -12 -41 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 0.571 0 3 0 1 Total OI 7.19 4 10 4 10
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 2025-05-01 $29.44 $27.00 56.2% 16.1% 0.0% 0.0% 0.0% -10.0% -16.7% 256 -6.7K -12 0.00 134.75 N/A N/A 0 0 3 1 2025-05-02 $30.11 $27.00 54.3% 15.6% 0.0% 0.0% 24.8% 11.0% -13.1% 84 -6.1K -14 0.00 139.49 N/A N/A 2 0 3 1 2025-05-05 $29.24 $0.00 62.0% 14.5% 0.0% 0.0% 0.0% 4.9% -17.3% 242 -7.4K -24 0.00 142.69 N/A N/A 0 0 5 1 2025-05-06 $30.54 $0.00 65.1% 11.9% 0.0% 0.0% 0.0% 10.4% -0.7% 253 -8.7K -24 0.00 142.15 N/A N/A 0 0 5 1 2025-05-07 $29.63 $0.00 64.2% 12.4% 0.0% 0.0% 0.0% 4.5% -4.0% 247 -8.2K -23 0.00 143.29 N/A N/A 0 0 5 1 2025-05-08 $30.63 $0.00 63.8% 11.8% 0.0% 0.0% 0.0% 6.1% -1.7% 253 -9.6K -22 0.00 142.54 N/A N/A 1 0 5 1 2025-05-09 $30.76 $0.00 65.9% 11.7% 0.0% 0.0% 0.0% 5.9% -2.6% 266 -12.9K -22 0.00 142.58 N/A N/A 2 0 6 1 2025-05-12 $30.77 $0.00 72.5% 11.8% 0.0% 0.0% 0.0% 11.3% -3.0% 352 -12.1K -21 0.00 142.53 N/A N/A 0 0 6 1 2025-05-13 $31.06 $0.00 72.3% 9.5% 62.4% 0.0% 0.0% 22.2% -3.4% 423 -12.4K -20 0.00 143.25 N/A N/A 0 0 6 1 2025-05-14 $31.62 $0.00 39.7% 11.4% 60.3% 0.0% 0.0% 24.9% -2.4% 489 -13.7K -19 0.00 142.68 N/A N/A 0 0 6 1 2025-05-15 $31.34 $0.00 40.4% 11.6% 59.1% 0.0% 0.0% 8.9% -0.9% 390 -12.7K -18 0.00 142.43 N/A N/A 0 0 6 1 2025-05-16 $30.39 $0.00 42.2% 12.1% 59.6% 0.0% 0.0% 12.8% -5.5% 112 -9.4K -18 0.00 142.87 N/A N/A 0 0 6 1 2025-05-19 $30.73 $0.00 37.8% 10.8% 57.9% 0.0% 0.0% 1.6% -10.2% 108 -9.8K -16 0.00 145.47 N/A N/A 3 0 4 0 2025-05-20 $31.47 $0.00 37.4% 10.7% 56.6% 0.0% 0.0% 4.2% -15.7% 358 -15.7K -32 0.00 144.81 N/A N/A 2 0 7 0 2025-05-21 $30.35 $0.00 40.9% 11.7% 48.1% 0.0% 0.0% 3.3% -6.9% 473 -15.1K -44 0.00 145.78 N/A N/A 0 0 9 0 2025-05-22 $30.19 $0.00 40.3% 11.5% 47.0% 0.0% 0.0% 1.8% -4.4% 504 -14.5K -42 0.00 146.38 N/A N/A 0 0 9 0 2025-05-23 $30.70 $0.00 42.6% 12.2% 42.8% 0.0% 0.0% 7.3% -7.5% 629 -15.0K -43 0.00 145.93 N/A N/A 0 0 9 0 2025-05-27 $29.99 $0.00 34.7% 9.9% 43.8% 0.0% 0.0% 17.4% -3.9% 605 -13.9K -40 0.00 136.81 N/A N/A 1 0 9 0 2025-05-28 $31.93 $0.00 56.8% 16.3% 47.4% 0.0% 0.0% 13.0% -4.5% 352 -19.4K -60 0.00 137.81 N/A N/A 0 0 10 0 2025-05-29 $29.15 $0.00 44.4% 12.7% 55.8% 0.0% 0.0% 2.3% -5.8% 515 -12.8K -44 0.00 146.35 N/A N/A 0 0 10 0 2025-05-30 $29.05 $0.00 36.5% 10.5% 53.8% 0.0% 0.0% 1.8% -5.5% 531 -12.3K -41 0.00 138.91 N/A N/A 1 0 10 0
« Apr 2025 | All History | Jun 2025 » Home BMAX History May 2025