COSW · Roundhill COST WeeklyPay ETF ETF

Alerts for COSW

$37.48 -0.44 (-1.16%) At close · Sep 4

Options Chain

Underlying $37.48 · at close Sep 4, 2026 Options Calculator

Positioning

Sep 18, 2026 · 12 days to expiry · 36 contracts · mixed daily-bar sessions · Jun 16, 2026–Aug 24, 2026; 31 unknown

Put / call OI

0.07

Call-heavy positioning

Open interest

as of Sep 3, 2026

Volume

—

dated and unknown daily-bar sessions

Max pain

$40.00

$2.52 above spot

ATM implied vol

29.3%

market's expected move

Open interest by strike

Calls Puts

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Sep 18 12d Oct 16 40d Dec 18 103d Mar 19 194d

Calls								Puts
OI	Vol	IV	Δ	Bid	Ask	Last	Strike	Last	Bid	Ask	Δ	IV	Vol	OI
—	—	—	—	$11.50	$13.90	—		—	$0.00	$1.25	—	—	—	—
Call · $25 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:05.440 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $25 Daily-bar session Unknown Quote as of 2026-09-04 19:55:07.148 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	83.3%	0.934	$6.50	$8.90	—		—	$0.00	$1.25	—	—	—	—
Call · $30 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:05.325 UTC Last — Breakeven — Implied vol 83.3% Delta 0.934 ≈93% ITM Gamma 0.022 Theta -0.032 Vega 0.009 Open interest — OI effective date — Model this call Put · $30 Daily-bar session Unknown Quote as of 2026-09-04 19:55:04.240 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	37.9%	0.844	$1.60	$3.90	—		—	$0.00	$1.30	—	—	—	—
Call · $35 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:03.779 UTC Last — Breakeven — Implied vol 37.9% Delta 0.844 ≈84% ITM Gamma 0.089 Theta -0.028 Vega 0.017 Open interest — OI effective date — Model this call Put · $35 Daily-bar session Unknown Quote as of 2026-09-04 19:55:01.464 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
Underlying $37.48
—	—	—	—	$0.00	$1.40	—		—	$0.65	$2.90	-0.748	29.3%	—	—
Call · $39 Daily-bar session Unknown Quote as of 2026-09-04 19:55:01.193 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $39 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:54:33.036 UTC Last — Breakeven — Implied vol 29.3% Delta -0.748 ≈75% ITM Gamma 0.154 Theta -0.022 Vega 0.023 Open interest — OI effective date — Model this put
1	1	—	—	$0.00	$1.35	$1.22		—	$1.50	$3.90	-0.823	35.2%	—	—
Call · $40 Daily-bar session Aug 24, 2026 Quote as of 2026-09-04 19:55:02.508 UTC Last $1.22 Breakeven $41.22 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 OI effective date Sep 3, 2026 Model this call Put · $40 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:54:33.036 UTC Last — Breakeven — Implied vol 35.2% Delta -0.823 ≈82% ITM Gamma 0.104 Theta -0.021 Vega 0.018 Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$1.25	—		—	$2.45	$4.90	-0.859	42%	—	—
Call · $41 Daily-bar session Unknown Quote as of 2026-09-04 19:55:04.101 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $41 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:54:33.036 UTC Last — Breakeven — Implied vol 42% Delta -0.859 ≈86% ITM Gamma 0.075 Theta -0.022 Vega 0.016 Open interest — OI effective date — Model this put
1	1	—	—	$0.00	$1.25	$0.19		—	$3.40	$5.90	-0.885	47.9%	—	—
Call · $42 Daily-bar session Aug 24, 2026 Quote as of 2026-09-04 19:55:04.298 UTC Last $0.19 Breakeven $42.19 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 OI effective date Sep 3, 2026 Model this call Put · $42 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:54:33.036 UTC Last — Breakeven — Implied vol 47.9% Delta -0.885 ≈89% ITM Gamma 0.057 Theta -0.022 Vega 0.014 Open interest — OI effective date — Model this put
10	10	—	—	$0.00	$1.25	$1.15		—	$4.40	$6.90	-0.897	54.9%	—	—
Call · $43 Daily-bar session Aug 21, 2026 Quote as of 2026-09-04 19:55:04.700 UTC Last $1.15 Breakeven $44.15 Implied vol — Delta — Gamma — Theta — Vega — Open interest 10 OI effective date Sep 3, 2026 Model this call Put · $43 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:54:33.036 UTC Last — Breakeven — Implied vol 54.9% Delta -0.897 ≈90% ITM Gamma 0.046 Theta -0.023 Vega 0.013 Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$1.25	—		—	$5.40	$7.90	-0.905	61.6%	—	—
Call · $44 Daily-bar session Unknown Quote as of 2026-09-04 19:55:05.003 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $44 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:54:33.036 UTC Last — Breakeven — Implied vol 61.6% Delta -0.905 ≈90% ITM Gamma 0.039 Theta -0.024 Vega 0.012 Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$1.25	—		$4.40	$6.40	$8.90	-0.912	68%	1	1
Call · $45 Daily-bar session Unknown Quote as of 2026-09-04 19:55:06.602 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $45 In the money Daily-bar session Jun 16, 2026 Quote as of 2026-09-04 19:54:33.036 UTC Last $4.40 Breakeven $40.60 Implied vol 68% Delta -0.912 ≈91% ITM Gamma 0.033 Theta -0.025 Vega 0.011 Open interest 1 OI effective date Sep 3, 2026 Model this put
—	—	—	—	$0.00	$1.25	—		—	$7.40	$9.90	-0.917	74.1%	—	—
Call · $46 Daily-bar session Unknown Quote as of 2026-09-04 19:55:06.712 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $46 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:54:33.036 UTC Last — Breakeven — Implied vol 74.1% Delta -0.917 ≈92% ITM Gamma 0.029 Theta -0.027 Vega 0.011 Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$1.25	—		—	$8.40	$10.90	-0.922	80%	—	—
Call · $47 Daily-bar session Unknown Quote as of 2026-09-04 19:55:06.826 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $47 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:54:33.036 UTC Last — Breakeven — Implied vol 80% Delta -0.922 ≈92% ITM Gamma 0.026 Theta -0.028 Vega 0.01 Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$1.25	—		—	$9.40	$11.90	-0.925	85.7%	—	—
Call · $48 Daily-bar session Unknown Quote as of 2026-09-04 19:55:06.933 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $48 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:54:33.036 UTC Last — Breakeven — Implied vol 85.7% Delta -0.925 ≈93% ITM Gamma 0.023 Theta -0.028 Vega 0.01 Open interest — OI effective date — Model this put
2	2	—	—	$0.00	$1.25	$0.18		—	$10.40	$12.90	-0.929	91.2%	—	—
Call · $49 Daily-bar session Jul 2, 2026 Quote as of 2026-09-04 19:55:07.040 UTC Last $0.18 Breakeven $49.18 Implied vol — Delta — Gamma — Theta — Vega — Open interest 2 OI effective date Sep 3, 2026 Model this call Put · $49 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:54:33.036 UTC Last — Breakeven — Implied vol 91.2% Delta -0.929 ≈93% ITM Gamma 0.021 Theta -0.029 Vega 0.01 Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$1.25	—		—	$11.40	$13.90	-0.931	96.5%	—	—
Call · $50 Daily-bar session Unknown Quote as of 2026-09-04 19:55:07.264 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $50 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:43.459 UTC Last — Breakeven — Implied vol 96.5% Delta -0.931 ≈93% ITM Gamma 0.019 Theta -0.03 Vega 0.009 Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$1.25	—		—	$12.40	$14.90	-0.934	101.6%	—	—
Call · $51 Daily-bar session Unknown Quote as of 2026-09-04 19:55:07.379 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $51 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:54.547 UTC Last — Breakeven — Implied vol 101.6% Delta -0.934 ≈93% ITM Gamma 0.018 Theta -0.031 Vega 0.009 Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$1.25	—		—	$13.40	$15.90	—	—	—	—
Call · $52 Daily-bar session Unknown Quote as of 2026-09-04 19:55:07.488 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $52 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:36.207 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$1.25	—		—	$14.40	$16.90	—	—	—	—
Call · $53 Daily-bar session Unknown Quote as of 2026-09-04 19:55:07.541 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $53 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:55:54.547 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put

About this data

Each contract's last price, day range and volume belong to the daily-bar session shown in its details; unknown means the source omitted that timestamp. Open interest has its own effective date shown separately; implied volatility and greeks are model values computed when fetched. This chain has mixed daily-bar sessions · Jun 16, 2026–Aug 24, 2026; 31 unknown. Positioning totals are shown only when every returned open-interest value has the same known effective date. Bid and ask are real-time consolidated OPRA readings.

In-the-money strikes are tinted, deepening toward the money, and the bar beside each open-interest figure scales to the heaviest strike shown. Max pain is the listed strike where the most open interest would expire worthless — a positioning reference, not a forecast.