IBOC · International Bancshares Corp

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$76.71 +0.95 (+1.25%) At close · Jul 24

Market Cap

$4.77B

62.18M

Options Chain

15-min delayed Underlying $76.71 · today Options Calculator

Positioning

Aug 21, 2026 · 26 days to expiry · 28 contracts

Put / call OI

0.34

Call-heavy positioning

Open interest

contracts outstanding

Volume

traded today

Max pain

$40.00

$36.71 below spot

ATM implied vol

34.2%

market's expected move

Open interest by strike

Calls Puts

100

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Aug 21 26d Sep 18 54d Nov 20 117d Feb 19 208d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
0	—	152.5%	0.983	—		—	—	—	—	0
Call · $35 In the money Last — Breakeven — Implied vol 152.5% Delta 0.983 ≈98% ITM Gamma 0.001 Theta -0.024 Vega 0.007 Open interest 0 Model this call Put · $35 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
21	44	128.5%	0.981	$28.07		$0.40	—	—	12	12
Call · $40 In the money Last $28.07 Breakeven $68.07 Implied vol 128.5% Delta 0.981 ≈98% ITM Gamma 0.002 Theta -0.023 Vega 0.007 Open interest 21 Model this call Put · $40 Last $0.40 Breakeven $39.60 Implied vol — Delta — Gamma — Theta — Vega — Open interest 12 Model this put
0	—	107.4%	0.978	—		—	—	—	—	0
Call · $45 In the money Last — Breakeven — Implied vol 107.4% Delta 0.978 ≈98% ITM Gamma 0.002 Theta -0.022 Vega 0.008 Open interest 0 Model this call Put · $45 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
2	2	87.9%	0.975	$23.42		—	—	—	—	0
Call · $50 In the money Last $23.42 Breakeven $73.42 Implied vol 87.9% Delta 0.975 ≈97% ITM Gamma 0.003 Theta -0.021 Vega 0.017 Open interest 2 Model this call Put · $50 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	69.5%	0.971	—		—	-0.053	84.1%	—	0
Call · $55 In the money Last — Breakeven — Implied vol 69.5% Delta 0.971 ≈97% ITM Gamma 0.005 Theta -0.019 Vega 0.018 Open interest 0 Model this call Put · $55 Last — Breakeven — Implied vol 84.1% Delta -0.053 ≈5% ITM Gamma 0.006 Theta -0.036 Vega 0.018 Open interest 0 Model this put
0	—	55.6%	0.958	—		—	-0.066	65.5%	—	0
Call · $60 In the money Last — Breakeven — Implied vol 55.6% Delta 0.958 ≈96% ITM Gamma 0.008 Theta -0.021 Vega 0.018 Open interest 0 Model this call Put · $60 Last — Breakeven — Implied vol 65.5% Delta -0.066 ≈7% ITM Gamma 0.01 Theta -0.033 Vega 0.032 Open interest 0 Model this put
0	—	47.2%	0.917	—		—	-0.086	48.1%	—	0
Call · $65 In the money Last — Breakeven — Implied vol 47.2% Delta 0.917 ≈92% ITM Gamma 0.016 Theta -0.03 Vega 0.033 Open interest 0 Model this call Put · $65 Last — Breakeven — Implied vol 48.1% Delta -0.086 ≈9% ITM Gamma 0.016 Theta -0.029 Vega 0.033 Open interest 0 Model this put
2	1	30.8%	0.882	$6.03		—	-0.17	38.7%	—	0
Call · $70 In the money Last $6.03 Breakeven $76.03 Implied vol 30.8% Delta 0.882 ≈88% ITM Gamma 0.031 Theta -0.027 Vega 0.034 Open interest 2 Model this call Put · $70 Last — Breakeven — Implied vol 38.7% Delta -0.17 ≈17% ITM Gamma 0.032 Theta -0.038 Vega 0.052 Open interest 0 Model this put
10	1	26.9%	0.648	$3.85		—	-0.391	41.5%	—	0
Call · $75 In the money Last $3.85 Breakeven $78.85 Implied vol 26.9% Delta 0.648 ≈65% ITM Gamma 0.068 Theta -0.042 Vega 0.08 Open interest 10 Model this call Put · $75 Last — Breakeven — Implied vol 41.5% Delta -0.391 ≈39% ITM Gamma 0.045 Theta -0.061 Vega 0.08 Open interest 0 Model this put
Underlying $76.71
0	—	25.8%	0.296	—		—	-0.649	34.8%	—	0
Call · $80 Last — Breakeven — Implied vol 25.8% Delta 0.296 ≈30% ITM Gamma 0.065 Theta -0.036 Vega 0.074 Open interest 0 Model this call Put · $80 In the money Last — Breakeven — Implied vol 34.8% Delta -0.649 ≈65% ITM Gamma 0.053 Theta -0.049 Vega 0.073 Open interest 0 Model this put
0	—	32.2%	0.131	—		—	-0.813	40%	—	0
Call · $85 Last — Breakeven — Implied vol 32.2% Delta 0.131 ≈13% ITM Gamma 0.032 Theta -0.027 Vega 0.039 Open interest 0 Model this call Put · $85 In the money Last — Breakeven — Implied vol 40% Delta -0.813 ≈81% ITM Gamma 0.033 Theta -0.039 Vega 0.057 Open interest 0 Model this put
0	—	44%	0.101	—		—	-0.855	53.1%	—	0
Call · $90 Last — Breakeven — Implied vol 44% Delta 0.101 ≈10% ITM Gamma 0.019 Theta -0.031 Vega 0.04 Open interest 0 Model this call Put · $90 In the money Last — Breakeven — Implied vol 53.1% Delta -0.855 ≈86% ITM Gamma 0.022 Theta -0.045 Vega 0.039 Open interest 0 Model this put
0	—	—	—	—		—	-0.875	64.2%	—	0
Call · $95 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $95 In the money Last — Breakeven — Implied vol 64.2% Delta -0.875 ≈88% ITM Gamma 0.016 Theta -0.048 Vega 0.04 Open interest 0 Model this put
0	—	—	—	—		—	-0.889	74.7%	—	0
Call · $100 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $100 In the money Last — Breakeven — Implied vol 74.7% Delta -0.889 ≈89% ITM Gamma 0.013 Theta -0.051 Vega 0.041 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 315709 CUSIP 459044103 13F (30d) 55 filings 55 filers Visit website Investor relations