BX Options History — May 2025

In May 2025, BX traded between $134.53 and $149.40. ATM implied volatility averaged 35.4%, placing in the 23.6% IV rank vs the trailing year. The 30-day expected move averaged 10.0%. IV traded below realized volatility by 19.7% (HV 20d: 55.1%). Max pain ranged from $140.00 to $140.00. Net GEX was positive for 12 of 21 trading days. Term structure was in contango for 11 of 21 days. Put/call ratio averaged 2.58.

Notable Days

  • 2025-05-22: Highest Volume — 38,056 contracts
  • 2025-05-02: Largest IV drop — 15.3% change
  • 2025-05-01: Highest IV Rank — 38.0%
  • 2025-05-01: Largest Expected Move — 11.7%

Monthly Statistics

MetricAvgMinMaxOpenClose
Price$140.81$134.53$149.40$134.87$138.42
Max Pain$140.00$140.00$140.00$140.00$140.00
ATM IV35.4%30.6%43.0%43.0%35.5%
Expected Move10.0%8.7%11.7%11.7%9.8%
HV 20d55.1%35.5%92.3%92.3%35.5%
HV 60d62.1%61.1%62.9%61.2%62.3%
IV Rank23.6%14.5%38.0%38.0%23.7%
IV Percentile77.4%57.5%92.9%92.9%77.4%
Term Structure-0.2%-3.1%2.1%-3.1%2.1%
VWIV34.4%29.2%44.1%44.1%33.0%
Skew 25d6.9%3.8%14.0%8.4%4.7%
Skew 10d12.1%-7.0%22.9%1.5%3.8%
Call IV 25d31.6%27.6%35.9%35.5%32.9%
Put IV 25d38.5%32.7%45.2%43.9%37.6%
Bid-Ask Spread %53.2444.2261.2644.2252.68
Gamma HHI0.060.050.070.050.05
Net GEX208.1K-13.0M12.8M-73.6K-4.5M
Net DEX-50.9M-478.5M217.5M120.0M110.6M
Net VEX-7.5M-7.7M-7.3M-7.5M-7.3M
Div Yield0.0%0.0%0.0%0.0%0.0%
P/C Ratio2.580.866.616.483.26
Total Volume18,676.8579,22438,05626,07921,672
Total OI357,778.667338,448380,208356,049358,622

Daily Data (21 trading days)

DatePriceMax PainATM IVExp MoveHV 20dIV RankVWIVSkew 25dTerm StrGEXDEXVEXP/CSpread %Call WallPut WallCall VolPut VolCall OIPut OI
2025-05-01$134.87$140.0043.0%11.7%92.3%38.0%44.1%8.4%-3.1%-73.6K120.0M-7.5M6.4844.22N/AN/A3,48722,592155,785200,264
2025-05-02$137.67$140.0036.5%10.7%84.9%25.6%39.7%8.2%1.1%6.0M-1.1M-7.5M1.1146.04N/AN/A8,8499,805156,679200,100
2025-05-05$136.72$140.0037.5%11.1%83.0%27.6%34.0%9.9%0.1%741.2K78.6M-7.5M1.2149.75N/AN/A5,3206,450155,317192,626
2025-05-06$134.53$140.0040.0%11.1%82.5%32.2%38.7%8.1%-1.1%-2.5M171.6M-7.4M2.7949.74N/AN/A3,4339,568157,047194,915
2025-05-07$136.58$140.0039.7%11.3%80.5%31.7%35.5%14.0%-0.1%107.6K108.0M-7.5M2.2756.20N/AN/A3,8188,659158,115198,139
2025-05-08$140.99$140.0037.6%11.0%60.6%27.8%35.7%6.7%-3.0%7.3M-122.0M-7.7M2.2245.51N/AN/A8,24518,342158,726201,457
2025-05-09$139.13$140.0036.1%10.3%51.5%24.9%37.7%7.7%-0.4%1.6M-13.2M-7.6M2.2359.29N/AN/A6,64214,829160,336205,847
2025-05-12$148.66$140.0032.1%9.0%55.9%17.4%32.6%6.7%-0.8%12.3M-453.3M-7.5M0.9550.95N/AN/A14,45413,683158,705208,473
2025-05-13$149.40$140.0030.6%8.7%55.5%14.5%32.1%4.7%0.1%12.8M-478.5M-7.5M0.8659.94N/AN/A7,6286,551160,675210,923
2025-05-14$148.50$140.0032.6%9.0%55.5%18.3%32.6%4.8%-1.1%8.4M-419.0M-7.7M1.5558.30N/AN/A4,6247,148162,598213,129
2025-05-15$147.05$140.0033.0%9.5%53.2%19.0%30.8%3.8%1.1%3.8M-334.3M-7.6M6.6161.26N/AN/A4,15427,453162,959215,181
2025-05-16$146.93$140.0031.9%9.0%53.1%17.0%29.2%4.8%-0.9%3.5M-347.7M-7.5M2.1855.22N/AN/A6,45414,092162,968217,240
2025-05-19$145.22$140.0032.8%9.3%40.7%18.6%31.5%6.9%0.5%2.2M-172.3M-7.6M1.4350.81N/AN/A3,7915,433144,558193,890
2025-05-20$144.23$140.0032.5%9.3%39.2%18.1%33.5%5.7%0.7%778.3K-125.3M-7.5M1.6145.42N/AN/A3,9706,383145,419194,934
2025-05-21$137.69$140.0037.4%10.7%43.4%27.4%37.2%10.1%0.1%-7.1M154.6M-7.6M2.8656.45N/AN/A5,55515,865146,916196,742
2025-05-22$137.43$140.0036.3%10.4%37.9%25.2%32.9%5.4%0.8%-8.2M166.6M-7.4M4.1654.94N/AN/A7,38030,676149,092199,194
2025-05-23$136.46$140.0036.4%10.4%37.7%25.5%34.8%6.5%0.3%-13.0M217.5M-7.5M2.3658.16N/AN/A3,0537,203154,077201,837
2025-05-27$139.34$140.0034.5%9.7%38.3%21.9%33.1%6.7%-0.1%-5.5M69.4M-7.4M1.3151.58N/AN/A4,4985,908150,614200,045
2025-05-28$138.51$140.0034.5%9.6%38.3%21.8%32.1%5.3%0.4%-7.0M96.3M-7.5M1.9855.99N/AN/A3,6947,314152,195201,322
2025-05-29$138.58$140.0033.6%9.1%37.4%20.2%30.9%5.9%-0.6%-7.3M104.9M-7.4M4.6555.64N/AN/A4,16619,373153,435202,256
2025-05-30$138.42$140.0035.5%9.8%35.5%23.7%33.0%4.7%2.1%-4.5M110.6M-7.3M3.2652.68N/AN/A5,08316,589155,100203,522