COST Options History — August 2025

In August 2025, COST traded between $938.78 and $995.36. ATM implied volatility averaged 20.9%, placing in the 14.7% IV rank vs the trailing year. The 30-day expected move averaged 5.6%. IV traded above realized volatility by 4.5% (HV 20d: 16.4%). Max pain ranged from $950.00 to $965.00. Net GEX was positive for 12 of 21 trading days. Term structure was in contango for 13 of 21 days. Put/call ratio averaged 0.75.

Notable Days

  • 2025-08-22: Highest Volume — 71,741 contracts
  • 2025-08-25: Largest IV spike — 15.6% change
  • 2025-08-27: Highest IV Rank — 31.1%
  • 2025-08-01: Largest Expected Move — 5.9%

Monthly Statistics

MetricAvgMinMaxOpenClose
Price$966.10$938.78$995.36$955.58$943.85
Max Pain$954.76$950.00$965.00$965.00$955.00
ATM IV20.9%18.4%25.3%20.5%24.4%
Expected Move5.6%5.3%5.9%5.9%5.3%
HV 20d16.4%12.4%20.5%12.5%19.0%
HV 60d17.7%17.1%18.9%17.3%17.2%
IV Rank14.7%5.6%31.1%13.3%27.6%
IV Percentile27.9%3.6%65.1%27.0%57.5%
Term Structure0.8%-2.3%5.1%-0.6%-0.9%
VWIV20.1%19.2%21.1%21.1%19.2%
Skew 25d1.6%0.5%2.0%1.8%1.6%
Skew 10d4.1%-0.5%12.3%2.2%4.3%
Call IV 25d20.2%17.7%25.3%19.9%24.3%
Put IV 25d21.8%18.7%26.7%21.7%25.9%
Bid-Ask Spread %48.2540.1757.4457.4453.26
Gamma HHI0.060.030.300.220.04
Net GEX98.0M-154.1M620.4M432.6M-50.0M
Net DEX-1.53B-3.30B437.4M-1.37B-48.8M
Net VEX-26.5M-27.2M-25.6M-27.1M-27.2M
Div Yield0.0%0.0%0.0%0.0%0.0%
P/C Ratio0.750.491.150.490.75
Total Volume36,000.52416,79371,74168,93630,899
Total OI262,108.571230,303284,060273,579279,583

Daily Data (21 trading days)

DatePriceMax PainATM IVExp MoveHV 20dIV RankVWIVSkew 25dTerm StrGEXDEXVEXP/CSpread %Call VolPut VolCall OIPut OI
2025-08-01$955.58$965.0020.5%5.9%12.5%13.3%21.1%1.8%-0.6%432.6M-1.37B-27.1M0.4957.4446,40522,531138,834134,745
2025-08-04$954.89$950.0019.6%5.7%12.4%9.8%20.0%2.0%0.1%60.1M-959.4M-26.7M0.5440.1719,33710,391128,259125,215
2025-08-05$944.96$950.0020.2%5.9%12.8%12.0%20.5%2.0%0.3%-19.4M-206.4M-26.4M0.6448.0915,84110,131132,921128,613
2025-08-06$969.05$950.0019.9%5.8%15.9%10.9%20.6%2.0%-0.1%218.0M-2.22B-26.7M0.6045.3529,20417,410135,726131,390
2025-08-07$976.16$950.0019.5%5.7%16.1%9.7%20.3%1.4%0.2%345.6M-2.90B-26.8M0.7344.0526,21619,125141,748134,359
2025-08-08$980.25$950.0019.0%5.5%16.0%7.6%19.9%0.9%0.1%620.4M-3.30B-26.8M0.6347.0526,08316,448145,857138,203
2025-08-11$989.01$950.0019.2%5.6%16.1%8.6%20.4%1.5%0.1%204.5M-3.22B-26.4M0.7546.0415,03311,222130,869127,536
2025-08-12$989.32$950.0018.4%5.4%15.5%5.6%19.8%1.8%0.6%214.9M-3.16B-26.3M1.0246.9510,79210,975133,203130,495
2025-08-13$978.59$950.0019.1%5.5%14.6%8.1%19.5%0.5%-0.0%98.3M-2.28B-26.2M0.9256.0917,30515,961135,480133,672
2025-08-14$976.57$950.0019.1%5.5%14.7%8.0%19.7%1.8%0.2%75.3M-2.17B-26.4M0.6551.6317,35611,280138,501138,156
2025-08-15$972.66$955.0019.3%5.5%14.8%8.8%19.3%1.4%0.2%-18.8M-1.81B-26.2M0.6850.1423,67616,144142,151140,769
2025-08-18$980.89$955.0018.9%5.4%14.9%7.3%19.6%1.7%4.5%85.4M-2.00B-26.4M0.8646.4511,5309,910113,497116,806
2025-08-19$979.18$955.0019.6%5.6%14.7%9.9%19.9%1.8%4.1%88.1M-1.98B-26.0M0.7950.539,3707,423119,122120,932
2025-08-20$995.36$960.0019.7%5.6%15.5%10.2%20.4%1.1%3.7%208.1M-3.14B-26.1M0.6847.7122,59815,297120,846123,246
2025-08-21$968.27$960.0021.1%5.8%18.7%15.3%20.6%1.6%4.4%-43.7M-1.14B-25.6M0.6847.3724,05316,252123,931124,826
2025-08-22$957.99$960.0021.6%5.6%19.2%17.4%19.8%1.3%5.1%-154.1M-354.9M-25.9M1.0250.4435,44436,297127,305127,512
2025-08-25$941.15$960.0025.0%5.8%20.3%29.8%20.6%2.0%-2.3%-115.9M390.7M-26.1M0.6546.3422,83014,933121,154122,125
2025-08-26$938.78$960.0024.5%5.7%20.3%28.1%20.5%1.9%-0.7%-118.5M437.4M-26.6M0.7745.4320,49815,687128,402126,929
2025-08-27$949.83$960.0025.3%5.7%20.5%31.1%20.3%1.1%-0.7%-18.1M-573.4M-27.2M0.7046.2516,05411,234134,971132,942
2025-08-28$945.69$955.0024.8%5.4%19.6%29.2%19.3%1.7%-0.7%-54.0M-202.7M-27.2M1.1546.4612,47314,363137,757135,692
2025-08-29$943.85$955.0024.4%5.3%19.0%27.6%19.2%1.6%-0.9%-50.0M-48.8M-27.2M0.7553.2617,70013,199140,788138,795