MDU · Mdu Resources Group Inc

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$20.76 +0.74 (+3.70%) At close · Aug 6

Market Cap

$4.34B

209.01M

Options Chain

15-min delayed Underlying $20.76 · at close Aug 6, 2026 Options Calculator

Positioning

Aug 21, 2026 · 14 days to expiry · 16 contracts

Put / call OI

0.11

Call-heavy positioning

Open interest

contracts outstanding

Volume

traded today

Max pain

$20.00

$0.76 below spot

ATM implied vol

71%

market's expected move

Open interest by strike

Calls Puts

12.5

17.5

22.5

27.5

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Aug 21 14d Sep 18 42d Oct 16 70d Jan 15 161d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
0	—	—	—	—		—	—	—	—	0
Call · $12.5 In the money Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $12.5 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	—	—	—		—	—	—	—	0
Call · $15 In the money Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $15 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	—	—	—		$0.13	-0.171	100.4%	1	1
Call · $17.5 In the money Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $17.5 Last $0.13 Breakeven $17.37 Implied vol 100.4% Delta -0.171 ≈17% ITM Gamma 0.061 Theta -0.036 Vega 0.01 Open interest 1 Model this put
33	3	27%	0.766	$1.12		$0.56	-0.39	114.9%	4	4
Call · $20 In the money Last $1.12 Breakeven $21.12 Implied vol 27% Delta 0.766 ≈77% ITM Gamma 0.276 Theta -0.012 Vega 0.014 Open interest 33 Model this call Put · $20 Last $0.56 Breakeven $19.44 Implied vol 114.9% Delta -0.39 ≈39% ITM Gamma 0.081 Theta -0.063 Vega 0.016 Open interest 4 Model this put
Underlying $20.76
12	1	38.2%	0.154	$0.20		—	-0.686	71.7%	—	0
Call · $22.5 Last $0.20 Breakeven $22.70 Implied vol 38.2% Delta 0.154 ≈15% ITM Gamma 0.151 Theta -0.013 Vega 0.012 Open interest 12 Model this call Put · $22.5 In the money Last — Breakeven — Implied vol 71.7% Delta -0.686 ≈69% ITM Gamma 0.12 Theta -0.036 Vega 0.015 Open interest 0 Model this put
0	—	98.4%	0.2	—		—	-0.814	93.9%	—	0
Call · $25 Last — Breakeven — Implied vol 98.4% Delta 0.2 ≈20% ITM Gamma 0.069 Theta -0.039 Vega 0.012 Open interest 0 Model this call Put · $25 In the money Last — Breakeven — Implied vol 93.9% Delta -0.814 ≈81% ITM Gamma 0.069 Theta -0.035 Vega 0.012 Open interest 0 Model this put
0	—	—	—	—		—	-0.95	82%	—	0
Call · $27.5 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $27.5 In the money Last — Breakeven — Implied vol 82% Delta -0.95 ≈95% ITM Gamma 0.031 Theta -0.011 Vega 0.005 Open interest 0 Model this put
1	2	—	—	$0.15		—	-0.89	135.4%	—	0
Call · $30 Last $0.15 Breakeven $30.15 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 Model this call Put · $30 In the money Last — Breakeven — Implied vol 135.4% Delta -0.89 ≈89% ITM Gamma 0.034 Theta -0.035 Vega 0.009 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 67716 CUSIP 552690109 13F (30d) 199 filings 174 filers Visit website Investor relations