COST Options History — August 2021

In August 2021, COST traded between $429.22 and $460.24. ATM implied volatility averaged 17.1%, placing in the 9.8% IV rank vs the trailing year. The 30-day expected move averaged 4.6%. IV traded above realized volatility by 5.1% (HV 20d: 12.0%). Max pain ranged from $405.00 to $435.00. Net GEX was positive for 22 of 22 trading days. Term structure was in contango for 11 of 22 days. Put/call ratio averaged 0.77.

Notable Days

  • 2021-08-19: Highest Volume — 43,408 contracts
  • 2021-08-19: Largest IV spike — 7.1% change
  • 2021-08-26: Highest IV Rank — 18.0%
  • 2021-08-19: Largest Expected Move — 5.2%

Monthly Statistics

MetricAvgMinMaxOpenClose
Price$447.21$429.22$460.24$429.22$454.55
Max Pain$425.23$405.00$435.00$405.00$435.00
ATM IV17.1%15.7%19.1%16.0%18.7%
Expected Move4.6%4.2%5.2%4.4%4.2%
HV 20d12.0%10.8%13.6%11.2%13.1%
HV 60d13.0%12.0%14.0%13.9%12.0%
IV Rank9.8%3.8%18.0%4.8%16.3%
IV Percentile19.9%7.1%31.3%9.9%31.0%
Term Structure0.5%-0.7%2.8%-0.2%-0.1%
VWIV16.5%15.0%18.8%16.0%15.1%
Skew 25d1.5%0.5%2.1%1.9%1.3%
Skew 10d3.1%-0.4%5.0%3.8%2.9%
Call IV 25d16.8%15.3%18.9%15.6%18.6%
Put IV 25d18.3%16.3%20.6%17.5%19.9%
Bid-Ask Spread %36.3815.5950.8429.8146.54
Gamma HHI0.130.070.350.080.09
Net GEX81.2M28.8M142.7M59.7M74.4M
Net DEX-2.26B-2.98B-1.77B-1.77B-2.23B
Net VEX-8.5M-9.2M-7.9M-8.0M-9.0M
Div Yield0.0%0.0%0.0%0.0%0.0%
P/C Ratio0.770.471.160.720.84
Total Volume26,527.13613,29643,40818,98813,296
Total OI198,308.636167,126220,148167,126204,033

Daily Data (22 trading days)

DatePriceMax PainATM IVExp MoveHV 20dIV RankVWIVSkew 25dTerm StrGEXDEXVEXP/CSpread %Call VolPut VolCall OIPut OI
2021-08-02$429.22$405.0016.0%4.4%11.2%4.8%16.0%1.9%-0.2%59.7M-1.77B-8.0M0.7229.8111,0567,93279,72487,402
2021-08-03$434.85$410.0016.0%4.3%11.6%4.8%15.8%0.5%0.0%71.9M-1.99B-8.4M0.7244.3813,93210,02784,94490,747
2021-08-04$435.43$410.0016.0%4.3%11.1%5.1%15.5%1.5%-0.0%80.8M-2.06B-8.3M1.0936.2410,74211,66086,63693,405
2021-08-05$443.04$420.0016.3%4.8%12.1%6.3%17.2%1.5%0.1%91.7M-2.45B-7.9M0.6038.8023,84914,29291,27696,083
2021-08-06$439.59$420.0016.1%4.7%12.3%5.3%16.6%1.1%-0.3%114.2M-2.34B-8.0M0.4739.0925,45212,05795,28499,381
2021-08-09$440.12$420.0016.2%4.7%11.3%5.6%16.8%1.3%-0.2%65.5M-2.05B-8.5M0.5033.8814,0326,96290,16795,591
2021-08-10$442.04$420.0016.1%4.7%11.1%5.2%17.2%1.4%0.2%91.5M-2.17B-8.6M0.9829.529,6089,37894,85698,445
2021-08-11$443.40$420.0016.0%4.7%11.0%5.0%16.7%1.2%0.3%116.5M-2.32B-8.4M0.6739.8521,03014,13598,851101,171
2021-08-12$445.69$420.0015.9%4.6%11.0%4.4%16.8%1.2%0.2%142.7M-2.45B-8.6M0.6832.5510,9647,503101,262104,719
2021-08-13$447.38$420.0015.7%4.6%10.8%3.8%16.4%1.4%0.4%138.3M-2.52B-8.4M0.6633.3115,54410,302103,454108,554
2021-08-16$452.72$420.0016.0%4.6%11.1%5.0%16.9%1.4%2.5%82.5M-2.57B-8.0M0.9530.4314,76613,96094,375100,315
2021-08-17$451.69$425.0017.0%4.9%11.2%9.0%17.3%1.7%2.1%82.6M-2.49B-8.5M1.1639.3312,80314,88996,666103,247
2021-08-18$447.65$430.0017.2%4.9%11.7%10.1%17.8%1.8%2.3%54.2M-2.23B-8.8M0.9541.4518,20017,289100,414110,256
2021-08-19$454.20$435.0018.4%5.2%12.2%15.4%18.8%2.1%2.5%81.3M-2.58B-9.0M0.9932.5621,77121,637100,996114,239
2021-08-20$460.24$435.0017.7%4.8%12.0%12.0%17.8%1.9%2.8%121.5M-2.98B-8.6M0.9533.1521,37720,314103,375116,773
2021-08-23$456.09$435.0018.4%4.6%12.8%15.1%16.7%1.4%-0.2%58.4M-2.31B-8.2M0.8146.3313,34610,86190,11599,231
2021-08-24$452.40$435.0018.7%4.5%13.5%16.2%16.1%1.4%-0.2%28.8M-2.03B-8.9M0.7648.0412,6029,55293,738104,711
2021-08-25$452.49$435.0018.8%4.4%13.2%16.7%15.9%1.6%-0.7%38.4M-2.04B-9.2M0.6531.3813,2398,58497,457106,883
2021-08-26$449.63$435.0019.1%4.5%13.6%18.0%16.1%1.7%-0.4%31.0M-1.93B-8.8M0.5127.3512,2616,307100,578108,763
2021-08-27$450.49$435.0018.2%4.2%13.2%14.5%15.0%1.4%-0.3%94.1M-2.03B-8.9M0.4950.8414,2436,935104,026111,383
2021-08-30$455.82$435.0018.7%4.2%13.5%16.2%15.4%1.4%-0.5%65.6M-2.28B-8.6M0.7715.5914,10710,80195,469103,795
2021-08-31$454.55$435.0018.7%4.2%13.1%16.3%15.1%1.3%-0.1%74.4M-2.23B-9.0M0.8446.547,2076,08998,189105,844