RELL · Richardson Electronics, Ltd.

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$18.14 -3.68 (-16.87%)

Market Cap

$317.63M

14.56M

Options Chain

15-min delayed

Underlying $21.82 · Jul 23, 2026 Options Calculator

Aug 21, 2026 · 28d Sep 18, 2026 · 56d Dec 18, 2026 · 147d Mar 19, 2027 · 238d

Put/Call OI

0.19

Open interest

1.1k

Volume

698

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
0	—	228.2%	0.991	—		$0.05	-0.013	253.1%	2	1
Call · $5 In the money Last — Breakeven — IV 228.2% Delta 0.991 (~99% ITM) Gamma 0.002 Theta -0.005 Vega 0.001 Open interest 0 Model this call Put · $5 Last $0.05 Breakeven $4.95 IV 253.1% Delta -0.013 (~1% ITM) Gamma 0.003 Theta -0.008 Vega 0.001 Open interest 1 Model this put
0	—	197.8%	0.971	—		$0.10	—	—	2	2
Call · $7.5 In the money Last — Breakeven — IV 197.8% Delta 0.971 (~97% ITM) Gamma 0.007 Theta -0.012 Vega 0.003 Open interest 0 Model this call Put · $7.5 Last $0.10 Breakeven $7.40 IV — Delta — Gamma — Theta — Vega — Open interest 2 Model this put
5	5	151%	0.951	$6.35		$0.05	-0.027	124.2%	2	4
Call · $10 In the money Last $6.35 Breakeven $16.35 IV 151% Delta 0.951 (~95% ITM) Gamma 0.013 Theta -0.014 Vega 0.006 Open interest 5 Model this call Put · $10 Last $0.05 Breakeven $9.95 IV 124.2% Delta -0.027 (~3% ITM) Gamma 0.01 Theta -0.007 Vega 0.004 Open interest 4 Model this put
0	—	141%	0.876	—		—	-0.093	118.2%	—	0
Call · $12.5 In the money Last — Breakeven — IV 141% Delta 0.876 (~88% ITM) Gamma 0.029 Theta -0.026 Vega 0.011 Open interest 0 Model this call Put · $12.5 Last — Breakeven — IV 118.2% Delta -0.093 (~9% ITM) Gamma 0.028 Theta -0.018 Vega 0.007 Open interest 0 Model this put
54	207	105%	0.793	$7.20		$0.50	-0.172	85.3%	144	87
Call · $15 In the money Last $7.20 Breakeven $22.20 IV 105% Delta 0.793 (~79% ITM) Gamma 0.054 Theta -0.028 Vega 0.016 Open interest 54 Model this call Put · $15 Last $0.50 Breakeven $14.50 IV 85.3% Delta -0.172 (~17% ITM) Gamma 0.06 Theta -0.02 Vega 0.012 Open interest 87 Model this put
168	14	98.8%	0.613	$2.30		$1.30	-0.385	83.8%	53	6
Call · $17.5 In the money Last $2.30 Breakeven $19.80 IV 98.8% Delta 0.613 (~61% ITM) Gamma 0.077 Theta -0.035 Vega 0.019 Open interest 168 Model this call Put · $17.5 Last $1.30 Breakeven $16.20 IV 83.8% Delta -0.385 (~38% ITM) Gamma 0.091 Theta -0.028 Vega 0.019 Open interest 6 Model this put
126	17	101.9%	0.425	$1.40		$2.84	-0.607	86.1%	81	65
Call · $20 In the money Last $1.40 Breakeven $21.40 IV 101.9% Delta 0.425 (~42% ITM) Gamma 0.077 Theta -0.037 Vega 0.021 Open interest 126 Model this call Put · $20 Last $2.84 Breakeven $17.16 IV 86.1% Delta -0.607 (~61% ITM) Gamma 0.09 Theta -0.03 Vega 0.018 Open interest 65 Model this put
Underlying $21.82
34	156	102.2%	0.271	$0.75		$4.66	-0.975	40.8%	1	11
Call · $22.5 Last $0.75 Breakeven $23.25 IV 102.2% Delta 0.271 (~27% ITM) Gamma 0.065 Theta -0.031 Vega 0.015 Open interest 34 Model this call Put · $22.5 In the money Last $4.66 Breakeven $17.84 IV 40.8% Delta -0.975 (~98% ITM) Gamma 0.041 Theta -0.002 Vega 0.002 Open interest 11 Model this put
472	8	102.9%	0.164	$0.35		$6.50	—	—	1	1
Call · $25 Last $0.35 Breakeven $25.35 IV 102.9% Delta 0.164 (~16% ITM) Gamma 0.048 Theta -0.023 Vega 0.01 Open interest 472 Model this call Put · $25 In the money Last $6.50 Breakeven $18.50 IV — Delta — Gamma — Theta — Vega — Open interest 1 Model this put
62	1	126%	0.103	$0.30		—	—	—	—	0
Call · $30 Last $0.30 Breakeven $30.30 IV 126% Delta 0.103 (~10% ITM) Gamma 0.028 Theta -0.021 Vega 0.011 Open interest 62 Model this call Put · $30 In the money Last — Breakeven — IV — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
4	4	164.2%	0.11	$0.45		—	—	—	—	0
Call · $35 Last $0.45 Breakeven $35.45 IV 164.2% Delta 0.11 (~11% ITM) Gamma 0.023 Theta -0.028 Vega 0.012 Open interest 4 Model this call Put · $35 In the money Last — Breakeven — IV — Delta — Gamma — Theta — Vega — Open interest 0 Model this put

22 contracts expiring August 21, 2026. Greeks, implied volatility, open interest and the last price come from the latest daily snapshot and are 15-minute delayed. In-the-money strikes are shaded and deepen toward the money; the strike nearest the underlying is highlighted. Click any strike for its greeks, breakevens and to model it in the calculator on the market's own implied volatility.

Key facts CIK 355948 CUSIP 763165107 13F (30d) 12 filings 12 filers Visit website