COST Options History — May 2021

In May 2021, COST traded between $372.95 and $385.54. ATM implied volatility averaged 20.8%, placing in the 22.9% IV rank vs the trailing year. The 30-day expected move averaged 5.7%. IV traded above realized volatility by 4.0% (HV 20d: 16.8%). Max pain ranged from $350.00 to $365.00. Net GEX was positive for 20 of 20 trading days. Term structure was in contango for 2 of 20 days. Put/call ratio averaged 0.71.

Notable Days

  • 2021-05-28: Highest Volume — 77,340 contracts
  • 2021-05-28: Largest IV drop — 13.2% change
  • 2021-05-12: Highest IV Rank — 37.1%
  • 2021-05-12: Largest Expected Move — 6.7%

Monthly Statistics

MetricAvgMinMaxOpenClose
Price$381.14$372.95$385.54$378.99$378.30
Max Pain$354.75$350.00$365.00$360.00$360.00
ATM IV20.8%16.6%24.1%19.9%16.6%
Expected Move5.7%4.5%6.7%4.5%4.6%
HV 20d16.8%12.3%19.0%12.3%19.0%
HV 60d19.0%18.3%19.7%18.4%18.3%
IV Rank22.9%4.5%37.1%18.6%4.5%
IV Percentile31.4%1.2%62.7%17.1%1.2%
Term Structure-0.4%-0.8%0.3%-0.3%0.2%
VWIV20.8%16.3%23.9%16.3%16.8%
Skew 25d1.5%0.0%2.4%1.9%1.1%
Skew 10d3.2%1.1%4.4%2.9%1.1%
Call IV 25d20.4%16.3%23.2%18.6%16.3%
Put IV 25d21.9%17.4%25.5%20.6%17.4%
Bid-Ask Spread %48.4536.4361.4250.6239.71
Gamma HHI0.110.070.240.090.15
Net GEX99.6M8.6M175.5M118.6M8.6M
Net DEX-1.66B-2.23B-1.07B-1.81B-1.07B
Net VEX-10.0M-10.4M-9.6M-10.2M-9.6M
Div Yield0.0%0.0%0.0%0.0%0.0%
P/C Ratio0.710.361.080.670.75
Total Volume22,050.910,01777,34027,72577,340
Total OI236,209.15219,348261,650229,179261,650

Daily Data (20 trading days)

DatePriceMax PainATM IVExp MoveHV 20dIV RankVWIVSkew 25dTerm StrGEXDEXVEXP/CSpread %Call VolPut VolCall OIPut OI
2021-05-03$378.99$360.0019.9%4.5%12.3%18.6%16.3%1.9%-0.3%118.6M-1.81B-10.2M0.6750.6216,59311,132125,567103,612
2021-05-04$374.12$365.0020.8%4.9%13.4%22.8%17.6%1.1%-0.6%88.9M-1.45B-10.1M0.8657.768,3937,211127,499106,713
2021-05-05$373.40$365.0020.3%4.7%13.3%20.7%16.7%0.4%-0.6%86.7M-1.39B-10.1M0.7252.375,8314,186128,127107,566
2021-05-06$381.58$350.0020.6%5.8%15.0%22.0%20.9%0.9%-0.7%137.8M-1.97B-10.2M0.7651.4115,81912,048129,396109,264
2021-05-07$385.00$350.0019.9%5.6%15.2%18.6%20.1%0.0%-0.7%175.5M-2.23B-9.8M0.5252.6617,3639,064130,194113,400
2021-05-10$383.76$350.0020.6%5.8%15.3%21.7%20.7%1.0%-0.2%102.9M-1.90B-9.9M0.7536.438,4216,335122,741106,402
2021-05-11$377.78$350.0022.0%6.1%16.6%28.1%22.0%2.2%-0.6%77.7M-1.45B-10.2M0.9844.777,6437,481123,529108,099
2021-05-12$372.95$350.0024.1%6.7%17.2%37.1%23.9%2.3%-0.8%55.8M-1.15B-10.4M1.0841.757,7258,351124,480108,679
2021-05-13$380.88$350.0023.2%6.5%17.7%33.2%23.5%2.4%-0.6%99.8M-1.65B-10.2M0.4948.5511,2675,519124,885110,213
2021-05-14$384.06$350.0021.4%6.1%17.8%25.6%22.0%2.0%-0.3%122.6M-1.91B-9.9M0.7253.4110,7027,693126,233111,569
2021-05-17$384.12$350.0021.8%6.2%17.7%27.3%22.5%1.4%-0.5%108.9M-1.84B-10.0M0.8651.797,5126,435121,313107,922
2021-05-18$384.35$350.0021.2%6.1%17.6%24.7%22.1%1.4%-0.4%113.8M-1.87B-10.0M0.6339.208,6605,441123,995110,662
2021-05-19$378.69$350.0022.7%6.5%18.5%31.3%23.9%1.8%-0.3%75.8M-1.46B-10.0M0.5755.5310,9876,289125,711112,397
2021-05-20$383.44$355.0021.5%6.2%18.7%25.9%22.2%1.6%-0.1%124.2M-1.78B-9.8M0.3639.0213,0844,659126,797114,116
2021-05-21$381.04$355.0021.0%6.0%18.8%23.5%22.1%1.5%0.3%79.5M-1.61B-10.0M0.4461.4215,8506,942129,692115,369
2021-05-24$384.31$355.0020.3%5.8%18.1%20.4%21.2%1.8%-0.6%91.8M-1.63B-9.7M0.6542.7514,0229,101118,128101,220
2021-05-25$385.41$360.0020.1%5.8%18.1%19.8%21.0%1.8%-0.4%103.0M-1.71B-10.0M0.6344.798,6725,494124,921105,133
2021-05-26$385.54$360.0019.4%5.6%18.0%16.7%20.5%1.4%-0.2%108.4M-1.73B-10.1M0.8753.336,8075,941128,444108,287
2021-05-27$385.09$360.0019.2%5.5%17.7%15.6%19.6%1.3%-0.5%111.2M-1.70B-9.7M0.8451.8121,20817,797130,182110,076
2021-05-28$378.30$360.0016.6%4.6%19.0%4.5%16.8%1.1%0.2%8.6M-1.07B-9.6M0.7539.7144,31433,026140,243121,407