MUB Options History — August 2025

In August 2025, MUB traded between $103.91 and $104.52. ATM implied volatility averaged 6.4%, placing in the 14.0% IV rank vs the trailing year. The 30-day expected move averaged 1.4%. IV traded above realized volatility by 4.0% (HV 20d: 2.4%). Max pain ranged from $103.00 to $104.00. Net GEX was positive for 21 of 21 trading days. Term structure was in contango for 18 of 21 days. Put/call ratio averaged 14.46.

Notable Days

  • 2025-08-12: Highest Volume — 17,585 contracts
  • 2025-08-12: Largest IV spike — 438.1% change
  • 2025-08-12: Highest IV Rank — 100.0%
  • 2025-08-06: Largest Expected Move — 1.6%

Monthly Statistics

MetricAvgMinMaxOpenClose
Price$104.17$103.91$104.52$104.15$104.52
Max Pain$103.76$103.00$104.00$103.00$104.00
ATM IV6.4%3.7%36.0%5.1%4.9%
Expected Move1.4%1.1%1.6%1.5%1.4%
HV 20d2.4%1.8%2.8%2.8%1.8%
HV 60d2.9%2.5%3.2%3.2%2.5%
IV Rank14.0%2.5%100.0%14.4%6.0%
IV Percentile37.0%6.0%100.0%35.7%31.3%
Term Structure0.6%-0.3%1.3%-0.3%-0.0%
VWIV4.9%3.9%6.0%5.2%4.2%
Skew 25d0.7%-0.9%1.5%1.0%1.0%
Skew 10d1.7%-0.3%9.0%1.6%1.3%
Call IV 25d4.5%3.0%5.5%4.7%4.0%
Put IV 25d5.2%3.5%6.6%5.7%5.1%
Bid-Ask Spread %24.5913.9046.1921.6513.90
Gamma HHI0.440.370.640.380.38
Net GEX38.6M4.6M111.5M46.4M25.3M
Net DEX-80.6M-119.6M-22.1M-102.4M-79.4M
Net VEX-432.6K-602.3K-296.5K-487.6K-427.2K
Div Yield0.0%0.0%0.0%0.0%0.0%
P/C Ratio14.460.00272.330.471.06
Total Volume2,457.9522817,5855933
Total OI59,077.04842,54177,87862,59449,167

Daily Data (21 trading days)

DatePriceMax PainATM IVExp MoveHV 20dIV RankVWIVSkew 25dTerm StrGEXDEXVEXP/CSpread %Call VolPut VolCall OIPut OI
2025-08-01$104.15$103.005.1%1.5%2.8%14.4%5.2%1.0%-0.3%46.4M-102.4M-487.6K0.4721.65401939,42823,166
2025-08-04$104.13$103.006.8%1.6%2.8%26.0%5.5%0.9%0.3%39.2M-91.7M-455.5K0.0628.4188539,47623,090
2025-08-05$104.19$103.005.6%1.6%2.8%17.9%0.0%1.1%0.5%45.1M-97.6M-443.0K0.6524.32523439,48623,094
2025-08-06$104.03$103.005.4%1.6%2.8%16.7%5.6%1.2%0.6%43.9M-89.9M-435.8K1.3340.3615120139,49423,073
2025-08-07$104.07$103.004.8%1.6%2.8%12.7%5.7%0.6%0.8%45.9M-89.1M-446.7K1.0024.077,5227,54439,62022,887
2025-08-08$104.02$104.005.5%1.5%2.6%17.4%0.0%0.8%0.7%53.4M-110.1M-602.3K0.0026.6649047,13930,427
2025-08-11$104.18$104.006.7%1.6%2.6%25.1%6.0%-0.9%0.3%54.6M-118.4M-571.7K2.1638.9910522747,12030,427
2025-08-12$104.13$104.0036.0%1.4%2.5%100.0%5.2%0.0%0.7%57.5M-116.1M-521.3K1.3325.827,54910,03647,22430,654
2025-08-13$104.22$104.004.5%1.3%2.4%4.6%4.9%0.9%1.1%60.9M-119.6M-498.3K0.3518.45541945,29231,006
2025-08-14$104.06$104.004.7%1.3%2.3%5.3%5.4%0.6%0.4%75.9M-102.2M-483.4K1.7719.6711921145,28230,992
2025-08-15$104.03$104.004.5%1.3%2.3%4.7%4.3%1.0%1.1%111.5M-94.5M-463.4K0.0323.69171545,31231,191
2025-08-18$104.02$104.004.8%1.4%2.1%5.5%5.0%0.7%0.7%7.3M-38.2M-431.8K0.9425.0424623229,20920,870
2025-08-19$104.13$104.004.4%1.3%2.2%4.4%4.3%0.8%1.2%11.6M-50.0M-402.6K0.2224.8423529,06020,726
2025-08-20$104.06$104.005.2%1.5%2.1%6.9%5.3%0.8%-0.0%6.5M-38.7M-417.9K1.0117.624,8224,84829,06520,727
2025-08-21$103.91$104.004.7%1.3%2.2%5.3%4.6%1.5%0.6%4.6M-22.1M-341.6K18.1920.511629125,46817,073
2025-08-22$104.23$104.003.7%1.1%2.4%2.5%4.9%1.0%1.3%21.7M-50.4M-296.5K0.6523.70432825,48217,065
2025-08-25$104.22$104.004.5%1.3%2.4%4.8%3.9%0.9%0.7%17.0M-39.5M-301.6K0.0716.722251525,52417,074
2025-08-26$104.32$104.004.5%1.3%2.3%4.9%4.2%0.6%0.8%21.4M-45.6M-305.3K0.0114.065,1824325,75217,075
2025-08-27$104.44$104.004.4%1.3%2.1%4.5%0.0%0.6%0.5%29.3M-102.6M-359.9K0.0021.69544030,91417,115
2025-08-28$104.50$104.004.3%1.2%2.0%4.0%4.2%-0.6%0.3%32.0M-94.5M-391.4K272.3346.19381731,25717,115
2025-08-29$104.52$104.004.9%1.4%1.8%6.0%0.0%1.0%-0.0%25.3M-79.4M-427.2K1.0613.90161731,26017,907