BX Options History — September 2025

In September 2025, BX traded between $166.38 and $188.66. ATM implied volatility averaged 30.9%, placing in the 15.1% IV rank vs the trailing year. The 30-day expected move averaged 8.7%. IV traded above realized volatility by 2.9% (HV 20d: 28.0%). Max pain ranged from $155.00 to $175.00. Net GEX was positive for 20 of 21 trading days. Term structure was in contango for 15 of 21 days. Put/call ratio averaged 0.87.

Notable Days

  • 2025-09-09: Highest Volume — 44,984 contracts
  • 2025-09-22: Largest IV spike — 8.0% change
  • 2025-09-30: Highest IV Rank — 25.0%
  • 2025-09-24: Largest Expected Move — 9.7%

Monthly Statistics

MetricAvgMinMaxOpenClose
Price$178.06$166.38$188.66$169.46$169.36
Max Pain$169.76$155.00$175.00$160.00$175.00
ATM IV30.9%27.9%36.2%29.0%36.2%
Expected Move8.7%8.1%9.7%8.6%9.3%
HV 20d28.0%24.2%32.7%26.1%32.7%
HV 60d29.4%28.3%30.3%29.5%30.3%
IV Rank15.1%9.4%25.0%11.5%25.0%
IV Percentile43.4%16.3%79.8%27.4%79.8%
Term Structure0.6%-2.3%2.4%-0.3%-2.3%
VWIV30.7%28.2%33.7%30.9%33.7%
Skew 25d4.5%2.3%5.7%5.1%5.2%
Skew 10d10.0%-3.5%25.1%22.3%-3.5%
Call IV 25d28.8%25.5%33.3%26.1%33.3%
Put IV 25d33.3%29.9%38.5%31.1%38.5%
Bid-Ask Spread %59.5139.9278.2948.9849.06
Gamma HHI0.110.070.330.100.07
Net GEX22.8M-3.5M66.8M5.4M8.9M
Net DEX-925.3M-1.60B-406.6M-598.5M-406.6M
Net VEX-7.2M-7.7M-6.8M-6.9M-7.5M
Div Yield0.0%0.0%0.0%0.0%0.0%
P/C Ratio0.870.181.680.560.87
Total Volume19,5076,76344,9847,15724,622
Total OI326,864.048292,665364,139312,496306,695

Daily Data (21 trading days)

DatePriceMax PainATM IVExp MoveHV 20dIV RankVWIVSkew 25dTerm StrGEXDEXVEXP/CSpread %Call WallPut WallCall VolPut VolCall OIPut OI
2025-09-02$169.46$160.0029.0%8.6%26.1%11.5%30.9%5.1%-0.3%5.4M-598.5M-6.9M0.5648.98N/AN/A4,5792,578128,191184,305
2025-09-03$166.38$155.0028.8%8.6%26.2%11.1%31.3%4.8%0.2%-3.5M-448.7M-7.0M0.6839.92N/AN/A5,0303,409129,580185,264
2025-09-04$169.78$170.0028.0%8.3%26.9%9.5%28.6%5.1%-0.1%11.3M-632.8M-7.0M1.5446.42N/AN/A8,63813,321131,507187,477
2025-09-05$170.14$170.0027.9%8.2%26.5%9.4%29.1%4.9%1.3%49.2M-631.4M-7.0M1.6157.11N/AN/A8,23013,246134,674192,002
2025-09-08$173.04$170.0028.2%8.1%27.0%10.0%29.0%4.3%-0.2%17.9M-746.5M-6.9M0.4967.90N/AN/A6,2463,071131,603190,725
2025-09-09$173.19$170.0028.6%8.2%26.8%10.7%28.8%4.2%0.4%20.1M-766.0M-7.0M1.6069.02N/AN/A17,30127,683134,036191,865
2025-09-10$177.77$170.0028.1%8.2%27.2%9.9%28.5%5.1%0.4%25.7M-959.9M-7.0M0.7669.33N/AN/A24,50618,669139,446204,057
2025-09-11$184.58$170.0028.2%8.3%29.9%10.0%29.1%2.3%0.8%66.8M-1.42B-6.8M0.2165.82N/AN/A30,4346,249148,712205,635
2025-09-12$181.40$170.0029.2%8.6%30.0%11.8%30.3%3.3%1.6%36.1M-1.19B-7.4M1.6870.70N/AN/A6,32310,597156,847207,292
2025-09-15$183.46$170.0030.8%8.9%29.7%14.9%32.4%3.3%1.4%28.4M-1.25B-7.2M0.6067.89N/AN/A8,6295,141143,690198,510
2025-09-16$183.99$170.0031.3%9.0%28.9%15.8%32.8%3.9%0.8%29.9M-1.29B-7.1M0.7467.03N/AN/A4,3473,197145,143201,341
2025-09-17$183.86$170.0030.7%8.8%28.0%14.8%30.5%4.6%1.3%31.9M-1.30B-6.9M1.1577.78N/AN/A14,41916,534146,718202,809
2025-09-18$188.66$170.0030.3%8.6%27.9%13.9%31.5%5.7%1.6%48.4M-1.58B-7.1M0.5178.29N/AN/A13,9057,092153,866203,421
2025-09-19$188.43$170.0029.6%8.2%27.5%12.6%28.2%3.6%2.4%28.2M-1.60B-6.9M0.9672.30N/AN/A11,28610,782156,012206,845
2025-09-22$185.14$170.0031.9%8.8%24.6%17.0%31.2%5.6%0.3%15.0M-1.04B-7.0M0.7452.84N/AN/A3,8932,870125,811167,785
2025-09-23$185.44$170.0033.1%9.1%24.2%19.2%33.1%4.2%-0.0%15.0M-1.04B-7.3M0.4155.01N/AN/A5,9602,421127,557169,038
2025-09-24$177.82$170.0034.4%9.7%29.3%21.6%33.5%4.5%1.2%8.1M-681.6M-7.7M1.5351.57N/AN/A12,03218,426130,207169,858
2025-09-25$175.70$175.0035.6%9.5%29.6%24.0%33.0%5.1%0.6%6.0M-589.0M-7.7M0.9653.02N/AN/A3,8373,693137,536177,723
2025-09-26$175.47$175.0034.0%8.4%29.6%20.8%29.6%4.7%0.9%15.4M-580.8M-7.6M0.5948.38N/AN/A4,2782,505138,815178,882
2025-09-29$176.22$175.0035.0%8.7%29.4%22.8%30.0%4.9%-0.6%13.7M-679.2M-7.4M0.1841.40N/AN/A16,7152,953125,618167,047
2025-09-30$169.36$175.0036.2%9.3%32.7%25.0%33.7%5.2%-2.3%8.9M-406.6M-7.5M0.8749.06N/AN/A13,16911,453138,690168,005