BTC · Grayscale Bitcoin Mini Trust ETF

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$28.22 -0.50 (-1.74%) At close · Jul 28

Market Cap

$3.44B

119.83M

Options Chain

15-min delayed Underlying $28.22 · at close Jul 28, 2026 Options Calculator

Positioning

Aug 21, 2026 · 23 days to expiry · 42 contracts

Put / call OI

0.32

Call-heavy positioning

Open interest

2,843

contracts outstanding

Volume

536

traded today

Max pain

$27.00

$1.22 below spot

ATM implied vol

39.6%

market's expected move

Open interest by strike

Calls Puts

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Aug 21 23d Sep 18 51d Dec 18 142d Jan 15 170d Mar 19 233d Jan 21 541d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
0	—	—	—	—		$0.35	-0.049	106.4%	2	3
Call · $19 In the money Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $19 Last $0.35 Breakeven $18.65 Implied vol 106.4% Delta -0.049 ≈5% ITM Gamma 0.013 Theta -0.017 Vega 0.006 Open interest 3 Model this put
9	11	—	—	$6.80		$0.15	-0.054	95.5%	2	8
Call · $20 In the money Last $6.80 Breakeven $26.80 Implied vol — Delta — Gamma — Theta — Vega — Open interest 9 Model this call Put · $20 Last $0.15 Breakeven $19.85 Implied vol 95.5% Delta -0.054 ≈5% ITM Gamma 0.016 Theta -0.016 Vega 0.01 Open interest 8 Model this put
0	—	—	—	—		—	-0.08	93.5%	—	0
Call · $21 In the money Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $21 Last — Breakeven — Implied vol 93.5% Delta -0.08 ≈8% ITM Gamma 0.022 Theta -0.021 Vega 0.011 Open interest 0 Model this put
53	64	—	—	$7.10		$0.03	-0.055	68.7%	10	112
Call · $22 In the money Last $7.10 Breakeven $29.10 Implied vol — Delta — Gamma — Theta — Vega — Open interest 53 Model this call Put · $22 Last $0.03 Breakeven $21.97 Implied vol 68.7% Delta -0.055 ≈5% ITM Gamma 0.023 Theta -0.012 Vega 0.006 Open interest 112 Model this put
0	—	—	—	—		$0.07	-0.071	61%	12	97
Call · $23 In the money Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $23 Last $0.07 Breakeven $22.93 Implied vol 61% Delta -0.071 ≈7% ITM Gamma 0.031 Theta -0.013 Vega 0.011 Open interest 97 Model this put
0	—	—	—	—		$0.45	-0.073	49.1%	1	6
Call · $24 In the money Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $24 Last $0.45 Breakeven $23.55 Implied vol 49.1% Delta -0.073 ≈7% ITM Gamma 0.039 Theta -0.01 Vega 0.011 Open interest 6 Model this put
3	1	—	—	$3.71		$0.12	-0.088	39.9%	1	128
Call · $25 In the money Last $3.71 Breakeven $28.71 Implied vol — Delta — Gamma — Theta — Vega — Open interest 3 Model this call Put · $25 Last $0.12 Breakeven $24.88 Implied vol 39.9% Delta -0.088 ≈9% ITM Gamma 0.056 Theta -0.01 Vega 0.012 Open interest 128 Model this put
82	4	0.2%	1	$3.89		$0.32	-0.175	41.3%	50	54
Call · $26 In the money Last $3.89 Breakeven $29.89 Implied vol 0.2% Delta 1 ≈100% ITM Gamma 0 Theta -0.003 Vega 0 Open interest 82 Model this call Put · $26 Last $0.32 Breakeven $25.68 Implied vol 41.3% Delta -0.175 ≈18% ITM Gamma 0.087 Theta -0.016 Vega 0.018 Open interest 54 Model this put
269	30	31.5%	0.767	$2.12		$0.50	-0.286	41.8%	52	134
Call · $27 In the money Last $2.12 Breakeven $29.12 Implied vol 31.5% Delta 0.767 ≈77% ITM Gamma 0.136 Theta -0.017 Vega 0.024 Open interest 269 Model this call Put · $27 Last $0.50 Breakeven $26.50 Implied vol 41.8% Delta -0.286 ≈29% ITM Gamma 0.114 Theta -0.021 Vega 0.024 Open interest 134 Model this put
130	51	38.7%	0.594	$1.04		$0.92	-0.41	40.4%	50	28
Call · $28 In the money Last $1.04 Breakeven $29.04 Implied vol 38.7% Delta 0.594 ≈59% ITM Gamma 0.139 Theta -0.025 Vega 0.028 Open interest 130 Model this call Put · $28 Last $0.92 Breakeven $27.08 Implied vol 40.4% Delta -0.41 ≈41% ITM Gamma 0.135 Theta -0.023 Vega 0.028 Open interest 28 Model this put
Underlying $28.22
305	77	29.5%	0.428	$0.71		$1.40	-0.537	45%	50	73
Call · $29 Last $0.71 Breakeven $29.71 Implied vol 29.5% Delta 0.428 ≈43% ITM Gamma 0.185 Theta -0.019 Vega 0.029 Open interest 305 Model this call Put · $29 In the money Last $1.40 Breakeven $27.60 Implied vol 45% Delta -0.537 ≈54% ITM Gamma 0.124 Theta -0.026 Vega 0.029 Open interest 73 Model this put
576	5	35.2%	0.303	$0.36		$1.95	-0.643	47.6%	8	19
Call · $30 Last $0.36 Breakeven $30.36 Implied vol 35.2% Delta 0.303 ≈30% ITM Gamma 0.138 Theta -0.02 Vega 0.026 Open interest 576 Model this call Put · $30 In the money Last $1.95 Breakeven $28.05 Implied vol 47.6% Delta -0.643 ≈64% ITM Gamma 0.111 Theta -0.026 Vega 0.026 Open interest 19 Model this put
340	8	32.4%	0.165	$0.29		$2.20	-0.72	51.5%	1	21
Call · $31 Last $0.29 Breakeven $31.29 Implied vol 32.4% Delta 0.165 ≈16% ITM Gamma 0.107 Theta -0.013 Vega 0.021 Open interest 340 Model this call Put · $31 In the money Last $2.20 Breakeven $28.80 Implied vol 51.5% Delta -0.72 ≈72% ITM Gamma 0.093 Theta -0.025 Vega 0.026 Open interest 21 Model this put
180	1	34.9%	0.105	$0.10		$2.95	-0.762	58.8%	1	2
Call · $32 Last $0.10 Breakeven $32.10 Implied vol 34.9% Delta 0.105 ≈11% ITM Gamma 0.072 Theta -0.01 Vega 0.014 Open interest 180 Model this call Put · $32 In the money Last $2.95 Breakeven $29.05 Implied vol 58.8% Delta -0.762 ≈76% ITM Gamma 0.075 Theta -0.026 Vega 0.02 Open interest 2 Model this put
66	10	37%	0.065	$0.60		—	-0.805	62%	—	0
Call · $33 Last $0.60 Breakeven $33.60 Implied vol 37% Delta 0.065 ≈7% ITM Gamma 0.048 Theta -0.007 Vega 0.008 Open interest 66 Model this call Put · $33 In the money Last — Breakeven — Implied vol 62% Delta -0.805 ≈81% ITM Gamma 0.063 Theta -0.024 Vega 0.021 Open interest 0 Model this put
21	18	50%	0.092	$0.07		—	-0.8	74.5%	—	0
Call · $34 Last $0.07 Breakeven $34.07 Implied vol 50% Delta 0.092 ≈9% ITM Gamma 0.046 Theta -0.013 Vega 0.014 Open interest 21 Model this call Put · $34 In the money Last — Breakeven — Implied vol 74.5% Delta -0.8 ≈80% ITM Gamma 0.053 Theta -0.03 Vega 0.021 Open interest 0 Model this put
102	10	48%	0.052	$0.55		$6.58	-0.813	82%	3	2
Call · $35 Last $0.55 Breakeven $35.55 Implied vol 48% Delta 0.052 ≈5% ITM Gamma 0.031 Theta -0.008 Vega 0.008 Open interest 102 Model this call Put · $35 In the money Last $6.58 Breakeven $28.42 Implied vol 82% Delta -0.813 ≈81% ITM Gamma 0.047 Theta -0.032 Vega 0.021 Open interest 2 Model this put
16	1	53.3%	0.048	$0.06		—	-0.807	94%	—	0
Call · $36 Last $0.06 Breakeven $36.06 Implied vol 53.3% Delta 0.048 ≈5% ITM Gamma 0.026 Theta -0.008 Vega 0.009 Open interest 16 Model this call Put · $36 In the money Last — Breakeven — Implied vol 94% Delta -0.807 ≈81% ITM Gamma 0.041 Theta -0.037 Vega 0.021 Open interest 0 Model this put
0	—	—	—	—		—	-0.833	96.4%	—	0
Call · $37 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $37 In the money Last — Breakeven — Implied vol 96.4% Delta -0.833 ≈83% ITM Gamma 0.037 Theta -0.035 Vega 0.021 Open interest 0 Model this put
1	1	—	—	$0.10		—	-0.84	103%	—	0
Call · $38 Last $0.10 Breakeven $38.10 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 Model this call Put · $38 In the money Last — Breakeven — Implied vol 103% Delta -0.84 ≈84% ITM Gamma 0.034 Theta -0.037 Vega 0.015 Open interest 0 Model this put
3	1	—	—	$0.20		—	-0.838	111.8%	—	0
Call · $39 Last $0.20 Breakeven $39.20 Implied vol — Delta — Gamma — Theta — Vega — Open interest 3 Model this call Put · $39 In the money Last — Breakeven — Implied vol 111.8% Delta -0.838 ≈84% ITM Gamma 0.032 Theta -0.04 Vega 0.015 Open interest 0 Model this put

About this data

Greeks, implied volatility, open interest and the last price come from the latest daily snapshot and are 15-minute delayed. Bid and ask are not included on this plan.

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.

Key facts CIK 2015034 CUSIP 389930207 13F (30d) 182 filings 182 filers Visit website