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Costco COST

US equityMarket cap rank #29Discount StoresTop Retailers
$898.13
−$6.58 (-0.73%)
Market open · Sep 24, 1:10 pm ET
After hours $904.60 -0.01%
Open$908.88
Prev close$904.70
Day range$897.33 – $909.43
Volume1.14M
Market cap$398.30B
P/E (TTM)45.2
Dividend yield0.60%

Average implied volatility across the listed chain right now: 34%. Implied volatility measures how big a price swing the options market is pricing in — there is no fixed “normal” level, it varies a lot by stock.

Calls

ExpiryStrikeLastBid/AskVolumeOpen interestIV
25 Sep 2026 $897.50 $16.50 $14.55/$16.95 66 41 36%
25 Sep 2026 $900.00 $14.00 $13.00/$14.85 265 386 34%
25 Sep 2026 $895.00 $17.40 $15.80/$18.05 175 85 36%
25 Sep 2026 $902.50 $13.80 $11.70/$14.35 11 58 35%
25 Sep 2026 $892.50 $19.00 $16.70/$19.45 13 23 35%
25 Sep 2026 $905.00 $11.75 $11.50/$12.75 111 168 35%
25 Sep 2026 $890.00 $19.05 $18.10/$21.05 172 132 36%
25 Sep 2026 $907.50 $11.50 $9.35/$11.60 48 23 33%
25 Sep 2026 $887.50 $20.88 $19.45/$21.65 34 77 35%
25 Sep 2026 $910.00 $10.16 $9.70/$10.40 206 398 34%
25 Sep 2026 $885.00 $23.49 $20.85/$24.25 28 17 36%
25 Sep 2026 $912.50 $9.95 $8.25/$9.55 16 42 34%
25 Sep 2026 $915.00 $8.35 $8.00/$8.75 82 208 34%
25 Sep 2026 $880.00 $26.00 $24.30/$27.75 3 29 37%
25 Sep 2026 $917.50 $7.77 $7.20/$7.95 7 77 34%

Puts

ExpiryStrikeLastBid/AskVolumeOpen interestIV
25 Sep 2026 $897.50 $16.00 $15.00/$17.00 54 29 33%
25 Sep 2026 $900.00 $17.50 $16.80/$18.65 401 1,020 33%
25 Sep 2026 $895.00 $14.95 $14.35/$15.65 175 245 33%
25 Sep 2026 $902.50 $18.66 $17.00/$21.00 4 24 33%
25 Sep 2026 $892.50 $13.80 $12.70/$15.30 64 28 34%
25 Sep 2026 $905.00 $20.45 $19.90/$21.35 179 286 34%
25 Sep 2026 $890.00 $13.25 $11.70/$13.00 1,089 363 33%
25 Sep 2026 $907.50 $21.60 $19.75/$23.95 9 83 33%
25 Sep 2026 $887.50 $11.43 $9.85/$12.60 44 74 33%
25 Sep 2026 $910.00 $22.86 $23.05/$24.45 69 658 34%
25 Sep 2026 $885.00 $10.35 $9.25/$11.30 93 258 33%
25 Sep 2026 $912.50 $25.37 $22.85/$26.50 38 100 32%
25 Sep 2026 $915.00 $27.55 $25.55/$28.70 5 315 34%
25 Sep 2026 $880.00 $8.55 $8.05/$9.10 155 615 33%
25 Sep 2026 $917.50 $28.07 $25.90/$30.05 40 81 31%

Open interest = contracts currently outstanding (not yet closed out). Higher open interest generally means a strike/expiry is more actively traded and easier to get in and out of.

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