COST Options History — March 2026

In March 2026, COST traded between $966.89 and $1007.90. ATM implied volatility averaged 23.8%, placing in the 24.2% IV rank vs the trailing year. The 30-day expected move averaged 7.0%. IV traded above realized volatility by 6.0% (HV 20d: 17.8%). Max pain ranged from $930.00 to $945.00. Net GEX was positive for 16 of 20 trading days. Term structure was in contango for 8 of 20 days. Put/call ratio averaged 1.17.

Notable Days

  • 2026-03-06: Highest Volume — 64,705 contracts
  • 2026-03-06: Largest IV drop — 8.6% change
  • 2026-03-03: Highest IV Rank — 41.5%
  • 2026-03-03: Largest Expected Move — 9.0%

Monthly Statistics

MetricAvgMinMaxOpenClose
Price$991.18$966.89$1007.90$1005.84$993.76
Max Pain$939.00$930.00$945.00$940.00$945.00
ATM IV23.8%21.2%28.4%27.3%23.3%
Expected Move7.0%6.1%9.0%8.7%6.7%
HV 20d17.8%16.3%20.5%19.8%16.6%
HV 60d20.6%20.0%21.2%21.2%20.2%
IV Rank24.2%14.4%41.5%37.1%22.3%
IV Percentile58.1%44.0%90.1%81.7%54.4%
Term Structure-0.1%-1.4%0.8%-0.7%-0.1%
VWIV25.2%22.4%31.7%30.7%24.5%
Skew 25d2.8%1.6%4.1%1.6%3.8%
Skew 10d5.4%2.9%8.0%7.4%5.9%
Call IV 25d22.6%20.4%27.5%26.4%20.7%
Put IV 25d25.4%22.4%29.4%27.9%24.4%
Bid-Ask Spread %29.2815.5849.8049.8025.03
Gamma HHI0.030.020.050.030.03
Net GEX53.7M-95.3M151.3M100.5M84.0M
Net DEX-2.56B-3.60B-1.16B-3.51B-2.17B
Net VEX-24.7M-25.6M-24.0M-25.4M-24.6M
Div Yield0.0%0.0%0.0%0.0%0.0%
P/C Ratio1.170.731.691.221.69
Total Volume24,128.6512,80364,70515,44426,001
Total OI211,309.25172,334241,582207,391195,561

Daily Data (20 trading days)

DatePriceMax PainATM IVExp MoveHV 20dIV RankVWIVSkew 25dTerm StrGEXDEXVEXP/CSpread %Call VolPut VolCall OIPut OI
2026-03-02$1005.84$940.0027.3%8.7%19.8%37.1%30.7%1.6%-0.7%100.5M-3.51B-25.4M1.2249.806,9588,486110,62296,769
2026-03-03$1007.90$945.0028.4%9.0%17.4%41.5%31.7%1.9%-0.7%97.7M-3.60B-25.3M0.9748.526,4876,316111,980100,459
2026-03-04$1007.77$945.0027.1%8.8%17.2%36.5%31.2%2.2%-0.9%98.2M-3.51B-25.3M1.0844.056,7897,312113,107101,909
2026-03-05$981.61$930.0027.1%7.6%19.8%36.3%26.9%1.9%-1.4%27.7M-2.36B-25.6M1.0233.7322,90523,397115,351104,840
2026-03-06$1000.02$930.0024.7%7.1%20.4%27.6%25.8%4.1%0.3%102.4M-3.26B-25.4M0.7739.8936,63728,068123,137118,445
2026-03-09$1005.81$930.0024.3%6.9%20.4%25.9%25.0%3.2%-0.5%102.7M-3.38B-24.9M0.7338.1012,3699,019110,336100,971
2026-03-10$1000.05$930.0022.5%6.5%20.5%19.3%24.1%2.8%-0.2%100.8M-3.14B-24.4M1.4737.927,88411,570112,334102,618
2026-03-11$991.38$935.0022.4%6.5%18.6%18.9%23.5%2.5%-0.1%60.5M-2.68B-24.7M1.6135.056,93611,193113,641106,203
2026-03-12$1004.30$935.0022.6%7.8%19.0%19.4%24.0%3.9%0.3%118.8M-3.34B-24.6M1.3616.038,71611,853114,661110,980
2026-03-13$1004.94$935.0022.7%6.5%17.1%20.1%24.7%2.5%-0.5%151.3M-3.40B-24.3M0.7815.5818,01514,043116,892113,660
2026-03-17$995.05$940.0021.2%6.1%16.9%14.4%22.4%2.0%0.2%69.9M-2.83B-24.0M0.9220.398,6417,938114,656110,657
2026-03-18$984.54$940.0022.1%6.3%17.2%17.7%22.4%2.3%0.1%-1.8M-2.28B-24.0M1.1523.348,2459,458116,323112,894
2026-03-19$976.29$940.0022.3%6.4%16.5%18.4%22.8%2.8%0.4%-51.0M-1.89B-24.5M1.6121.0511,42918,423116,909114,274
2026-03-20$973.70$940.0023.2%6.7%16.3%22.0%24.0%2.5%0.6%-95.3M-1.80B-24.8M1.0022.3114,26614,312119,753115,895
2026-03-23$966.89$940.0023.1%6.7%16.5%21.4%23.7%2.2%-0.5%-23.8M-1.16B-24.0M1.0124.318,5948,70385,78886,546
2026-03-24$973.06$945.0022.9%6.6%16.7%20.8%23.4%3.3%-0.2%2.3M-1.46B-24.2M0.7825.6510,7968,44088,89190,200
2026-03-25$975.47$945.0022.1%6.4%16.3%17.7%22.9%3.7%-0.1%13.2M-1.52B-24.4M1.6322.045,0358,22392,32593,250
2026-03-26$979.25$945.0023.2%6.6%16.3%21.9%23.3%3.0%0.8%42.4M-1.69B-24.6M1.4022.388,43011,82993,97796,460
2026-03-30$995.93$945.0024.1%6.9%17.3%25.3%26.3%3.2%0.3%73.3M-2.24B-24.6M1.1320.4013,53015,32791,19691,715
2026-03-31$993.76$945.0023.3%6.7%16.6%22.3%24.5%3.8%-0.1%84.0M-2.17B-24.6M1.6925.039,66216,33997,89197,670