REX · REX AMERICAN RESOURCES Corp

Track REX — free Ask ALVIS about REX

$42.45 -1.31 (-2.99%) At close · Jul 28

Market Cap

$1.40B

32.94M

Options Chain

15-min delayed Underlying $42.45 · at close Jul 28, 2026 Options Calculator

Positioning

Aug 21, 2026 · 23 days to expiry · 24 contracts

Put / call OI

0.53

Call-heavy positioning

Open interest

153

contracts outstanding

Volume

traded today

Max pain

$35.00

$7.45 below spot

ATM implied vol

50.1%

market's expected move

Open interest by strike

Calls Puts

17.5

22.5

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Aug 21 23d Sep 18 51d Nov 20 114d Feb 19 205d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
1	2	236.7%	0.964	$21.34		$0.45	—	—	1	1
Call · $17.5 In the money Last $21.34 Breakeven $38.84 Implied vol 236.7% Delta 0.964 ≈96% ITM Gamma 0.003 Theta -0.045 Vega 0.007 Open interest 1 Model this call Put · $17.5 Last $0.45 Breakeven $17.05 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 Model this put
0	—	208.6%	0.956	—		$0.60	—	—	1	1
Call · $20 In the money Last — Breakeven — Implied vol 208.6% Delta 0.956 ≈96% ITM Gamma 0.004 Theta -0.047 Vega 0.012 Open interest 0 Model this call Put · $20 Last $0.60 Breakeven $19.40 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 Model this put
0	—	186.8%	0.944	—		$0.35	—	—	1	6
Call · $22.5 In the money Last — Breakeven — Implied vol 186.8% Delta 0.944 ≈94% ITM Gamma 0.006 Theta -0.051 Vega 0.013 Open interest 0 Model this call Put · $22.5 Last $0.35 Breakeven $22.15 Implied vol — Delta — Gamma — Theta — Vega — Open interest 6 Model this put
0	—	156.8%	0.938	—		$0.70	-0.128	262.8%	1	7
Call · $25 In the money Last — Breakeven — Implied vol 156.8% Delta 0.938 ≈94% ITM Gamma 0.007 Theta -0.046 Vega 0.014 Open interest 0 Model this call Put · $25 Last $0.70 Breakeven $24.30 Implied vol 262.8% Delta -0.128 ≈13% ITM Gamma 0.007 Theta -0.128 Vega 0.021 Open interest 7 Model this put
21	14	105.4%	0.926	$19.85		$0.40	-0.074	105.1%	1	10
Call · $30 In the money Last $19.85 Breakeven $49.85 Implied vol 105.4% Delta 0.926 ≈93% ITM Gamma 0.012 Theta -0.037 Vega 0.016 Open interest 21 Model this call Put · $30 Last $0.40 Breakeven $29.60 Implied vol 105.1% Delta -0.074 ≈7% ITM Gamma 0.012 Theta -0.034 Vega 0.016 Open interest 10 Model this put
12	1	92.3%	0.83	$14.70		$1.12	-0.11	68.6%	1	4
Call · $35 In the money Last $14.70 Breakeven $49.70 Implied vol 92.3% Delta 0.83 ≈83% ITM Gamma 0.026 Theta -0.057 Vega 0.025 Open interest 12 Model this call Put · $35 Last $1.12 Breakeven $33.88 Implied vol 68.6% Delta -0.11 ≈11% ITM Gamma 0.026 Theta -0.03 Vega 0.017 Open interest 4 Model this put
10	4	61.1%	0.684	$13.25		$1.70	-0.252	39.2%	1	14
Call · $40 In the money Last $13.25 Breakeven $53.25 Implied vol 61.1% Delta 0.684 ≈68% ITM Gamma 0.055 Theta -0.053 Vega 0.036 Open interest 10 Model this call Put · $40 Last $1.70 Breakeven $38.30 Implied vol 39.2% Delta -0.252 ≈25% ITM Gamma 0.077 Theta -0.028 Vega 0.036 Open interest 14 Model this put
Underlying $42.45
6	1	34.4%	0.273	$2.55		$3.00	-0.792	27.2%	1	6
Call · $45 Last $2.55 Breakeven $47.55 Implied vol 34.4% Delta 0.273 ≈27% ITM Gamma 0.091 Theta -0.028 Vega 0.039 Open interest 6 Model this call Put · $45 In the money Last $3.00 Breakeven $42.00 Implied vol 27.2% Delta -0.792 ≈79% ITM Gamma 0.105 Theta -0.015 Vega 0.029 Open interest 6 Model this put
14	1	56.7%	0.144	$1.29		$4.01	—	—	5	4
Call · $50 Last $1.29 Breakeven $51.29 Implied vol 56.7% Delta 0.144 ≈14% ITM Gamma 0.038 Theta -0.03 Vega 0.021 Open interest 14 Model this call Put · $50 In the money Last $4.01 Breakeven $45.99 Implied vol — Delta — Gamma — Theta — Vega — Open interest 4 Model this put
30	2	77.3%	0.112	$0.09		—	—	—	—	0
Call · $55 Last $0.09 Breakeven $55.09 Implied vol 77.3% Delta 0.112 ≈11% ITM Gamma 0.023 Theta -0.034 Vega 0.022 Open interest 30 Model this call Put · $55 In the money Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
6	2	98.3%	0.103	$2.20		—	—	—	—	0
Call · $60 Last $2.20 Breakeven $62.20 Implied vol 98.3% Delta 0.103 ≈10% ITM Gamma 0.017 Theta -0.041 Vega 0.023 Open interest 6 Model this call Put · $60 In the money Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	112.1%	0.085	—		—	—	—	—	0
Call · $65 Last — Breakeven — Implied vol 112.1% Delta 0.085 ≈8% ITM Gamma 0.013 Theta -0.041 Vega 0.014 Open interest 0 Model this call Put · $65 In the money Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — 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 744187 CUSIP 761624105 13F (30d) 66 filings 41 filers Visit website Investor relations