BKH · Black Hills Corp /Sd/

Track BKH — free

$74.29 +0.35 (+0.47%) At close · Aug 14

Market Cap

$5.66B

76.25M

Options Chain

Underlying $74.29 · at close Aug 14, 2026 Options Calculator

Positioning

Aug 21, 2026 · 5 days to expiry · 32 contracts · mixed snapshot sessions · Jan 22, 2026–Aug 14, 2026; 8 unknown

Put / call OI

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dated and unknown snapshot sessions

Open interest

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dated and unknown snapshot sessions

Volume

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dated and unknown snapshot sessions

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Aug 21 5d Sep 18 33d Nov 20 96d Feb 19 187d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
0	—	244.8%	0.998	—		$0.25	-0.028	371%	1	2
Call · $35 In the money Snapshot session Unknown Last — Breakeven — Implied vol 244.8% Delta 0.998 ≈100% ITM Gamma 0 Theta -0.013 Vega 0.001 Open interest 0 Model this call Put · $35 Snapshot session Mar 24, 2026 Last $0.25 Breakeven $34.75 Implied vol 371% Delta -0.028 ≈3% ITM Gamma 0.002 Theta -0.199 Vega 0.006 Open interest 2 Model this put
0	—	202.7%	0.997	—		$0.20	-0.038	327.8%	5	6
Call · $40 In the money Snapshot session Unknown Last — Breakeven — Implied vol 202.7% Delta 0.997 ≈100% ITM Gamma 0.001 Theta -0.012 Vega 0.001 Open interest 0 Model this call Put · $40 Snapshot session Mar 26, 2026 Last $0.20 Breakeven $39.80 Implied vol 327.8% Delta -0.038 ≈4% ITM Gamma 0.003 Theta -0.23 Vega 0.007 Open interest 6 Model this put
0	—	—	—	—		$0.40	-0.05	287.8%	1	2
Call · $45 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $45 Snapshot session Mar 20, 2026 Last $0.40 Breakeven $44.60 Implied vol 287.8% Delta -0.05 ≈5% ITM Gamma 0.004 Theta -0.256 Vega 0.012 Open interest 2 Model this put
0	1	—	—	$24.85		$0.55	-0.047	215.9%	1	3
Call · $50 In the money Snapshot session May 5, 2026 Last $24.85 Breakeven $74.85 Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $50 Snapshot session Apr 1, 2026 Last $0.55 Breakeven $49.45 Implied vol 215.9% Delta -0.047 ≈5% ITM Gamma 0.005 Theta -0.183 Vega 0.007 Open interest 3 Model this put
16	105	180.6%	0.933	$19.50		$0.26	-0.058	173.2%	2	15
Call · $55 In the money Snapshot session Aug 14, 2026 Last $19.50 Breakeven $74.50 Implied vol 180.6% Delta 0.933 ≈93% ITM Gamma 0.008 Theta -0.195 Vega 0.013 Open interest 16 Model this call Put · $55 Snapshot session Jul 9, 2026 Last $0.26 Breakeven $54.74 Implied vol 173.2% Delta -0.058 ≈6% ITM Gamma 0.008 Theta -0.173 Vega 0.014 Open interest 15 Model this put
11	50	75%	0.994	$13.27		$0.10	-0.033	100.9%	2	38
Call · $60 In the money Snapshot session Aug 14, 2026 Last $13.27 Breakeven $73.27 Implied vol 75% Delta 0.994 ≈99% ITM Gamma 0.003 Theta -0.01 Vega 0.002 Open interest 11 Model this call Put · $60 Snapshot session Jul 27, 2026 Last $0.10 Breakeven $59.90 Implied vol 100.9% Delta -0.033 ≈3% ITM Gamma 0.008 Theta -0.063 Vega 0.008 Open interest 38 Model this put
17	60	—	—	$8.93		$0.10	-0.033	62.3%	2	336
Call · $65 In the money Snapshot session Aug 14, 2026 Last $8.93 Breakeven $73.93 Implied vol — Delta — Gamma — Theta — Vega — Open interest 17 Model this call Put · $65 Snapshot session Aug 11, 2026 Last $0.10 Breakeven $64.90 Implied vol 62.3% Delta -0.033 ≈3% ITM Gamma 0.013 Theta -0.039 Vega 0.009 Open interest 336 Model this put
21	66	60.7%	0.803	$4.30		$0.35	-0.101	39.4%	1	187
Call · $70 In the money Snapshot session Aug 14, 2026 Last $4.30 Breakeven $74.30 Implied vol 60.7% Delta 0.803 ≈80% ITM Gamma 0.052 Theta -0.142 Vega 0.023 Open interest 21 Model this call Put · $70 Snapshot session Aug 13, 2026 Last $0.35 Breakeven $69.65 Implied vol 39.4% Delta -0.101 ≈10% ITM Gamma 0.05 Theta -0.059 Vega 0.015 Open interest 187 Model this put
Underlying $74.29
886	21	34.7%	0.417	$0.35		$2.45	-0.554	48.2%	1	8
Call · $75 Snapshot session Aug 14, 2026 Last $0.35 Breakeven $75.35 Implied vol 34.7% Delta 0.417 ≈42% ITM Gamma 0.127 Theta -0.114 Vega 0.036 Open interest 886 Model this call Put · $75 In the money Snapshot session Aug 14, 2026 Last $2.45 Breakeven $72.55 Implied vol 48.2% Delta -0.554 ≈55% ITM Gamma 0.092 Theta -0.163 Vega 0.036 Open interest 8 Model this put
93	10	47.2%	0.1	$0.15		$7.10	-0.778	76%	7	7
Call · $80 Snapshot session Aug 5, 2026 Last $0.15 Breakeven $80.15 Implied vol 47.2% Delta 0.1 ≈10% ITM Gamma 0.042 Theta -0.07 Vega 0.016 Open interest 93 Model this call Put · $80 In the money Snapshot session Jul 2, 2026 Last $7.10 Breakeven $72.90 Implied vol 76% Delta -0.778 ≈78% ITM Gamma 0.044 Theta -0.194 Vega 0.025 Open interest 7 Model this put
44	4	131.9%	0.22	$0.13		—	-0.832	109.4%	—	0
Call · $85 Snapshot session Jul 28, 2026 Last $0.13 Breakeven $85.13 Implied vol 131.9% Delta 0.22 ≈22% ITM Gamma 0.025 Theta -0.333 Vega 0.025 Open interest 44 Model this call Put · $85 In the money Snapshot session Unknown Last — Breakeven — Implied vol 109.4% Delta -0.832 ≈83% ITM Gamma 0.026 Theta -0.235 Vega 0.025 Open interest 0 Model this put
3	1	120.8%	0.106	$0.50		$18.43	-0.849	144.6%	8	3
Call · $90 Snapshot session May 14, 2026 Last $0.50 Breakeven $90.50 Implied vol 120.8% Delta 0.106 ≈11% ITM Gamma 0.017 Theta -0.187 Vega 0.017 Open interest 3 Model this call Put · $90 In the money Snapshot session Jan 22, 2026 Last $18.43 Breakeven $71.57 Implied vol 144.6% Delta -0.849 ≈85% ITM Gamma 0.018 Theta -0.292 Vega 0.017 Open interest 3 Model this put
9	7	139.9%	0.08	$0.35		$21.33	-0.88	160.4%	18	1
Call · $95 Snapshot session May 1, 2026 Last $0.35 Breakeven $95.35 Implied vol 139.9% Delta 0.08 ≈8% ITM Gamma 0.012 Theta -0.178 Vega 0.018 Open interest 9 Model this call Put · $95 In the money Snapshot session Apr 9, 2026 Last $21.33 Breakeven $73.67 Implied vol 160.4% Delta -0.88 ≈88% ITM Gamma 0.014 Theta -0.271 Vega 0.018 Open interest 1 Model this put
17	1	135.8%	0.038	$0.05		—	-0.897	180.8%	—	0
Call · $100 Snapshot session Jul 27, 2026 Last $0.05 Breakeven $100.05 Implied vol 135.8% Delta 0.038 ≈4% ITM Gamma 0.007 Theta -0.095 Vega 0.011 Open interest 17 Model this call Put · $100 In the money Snapshot session Unknown Last — Breakeven — Implied vol 180.8% Delta -0.897 ≈90% ITM Gamma 0.011 Theta -0.275 Vega 0.018 Open interest 0 Model this put
107	3	178.2%	0.065	$0.07		—	-0.918	193.7%	—	0
Call · $105 Snapshot session Jul 20, 2026 Last $0.07 Breakeven $105.07 Implied vol 178.2% Delta 0.065 ≈6% ITM Gamma 0.008 Theta -0.191 Vega 0.011 Open interest 107 Model this call Put · $105 In the money Snapshot session Unknown Last — Breakeven — Implied vol 193.7% Delta -0.918 ≈92% ITM Gamma 0.009 Theta -0.25 Vega 0.011 Open interest 0 Model this put
0	—	196%	0.06	—		—	-0.911	224.2%	—	0
Call · $110 Snapshot session Unknown Last — Breakeven — Implied vol 196% Delta 0.06 ≈6% ITM Gamma 0.007 Theta -0.197 Vega 0.011 Open interest 0 Model this call Put · $110 In the money Snapshot session Unknown Last — Breakeven — Implied vol 224.2% Delta -0.911 ≈91% ITM Gamma 0.008 Theta -0.308 Vega 0.019 Open interest 0 Model this put

About this data

Each contract's last price, volume, greeks, implied volatility and open interest belongs to the snapshot session shown in its details; unknown means the provider omitted the timestamp. This chain has mixed snapshot sessions · Jan 22, 2026–Aug 14, 2026; 8 unknown. Cross-contract positioning totals are shown only when every returned row has the same known session. 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.

Key facts CIK 1130464 CUSIP 092113109 13F (30d) 444 filings 428 filers Visit website Investor relations