International Bancshares Corporation (IBOC) Stock Price & How to Invest

International Bancshares Corporation is a multibank financial holding company headquartered in Laredo, Texas, operating through International Bank of Commerce and affiliated charters across roughly ~75 communities in Texas and Oklahoma. Founded in 1966 and still led by Dennis Nixon, it held about ~$17.0 billion in assets, ~$12.7 billion in deposits and ~$9.9 billion in gross loans at June 30, 2026, with roughly ~2,319 employees. Its distinguishing asset is geography. The branch network is concentrated on the US-Mexico border, where cross-border trade and deposits from Mexican businesses and individuals supply an unusually cheap and sticky funding base. Commercial and commercial real estate lending does most of the earning; treasury management, international services and deposit fees do the rest.

The measures a bank is actually judged on read well. First-half 2026 net interest income was ~$336.7 million against ~$98.3 million of interest expense, non-interest income was ~$86.5 million, and non-interest expense of ~$158.7 million works out to an efficiency ratio near ~38%, a level most banks its size never reach. Return on assets of roughly ~2.4% is close to double the regional bank norm, yet the stock changes hands around ~11 times trailing earnings and ~1.5 times tangible book. The counterweight arrived in the second quarter. Non-accrual loans jumped from ~$140.3 million at year-end to ~$297.1 million, almost entirely one relationship of loans secured by interests in affordable housing projects, against an allowance for credit losses of ~$170.0 million. Management states that no losses have been realized on those loans and may never be. Whether that holds is the question the multiple is pricing.

The second-quarter jump in non-accrual loans, from ~$140.3 million to ~$297.1 million on what the company describes as a single affordable housing relationship, is the live question, and the ~$170.0 million allowance covers only part of it. Concentration is structural, since the loan book and the deposit base both lean on Texas border markets whose economics move with US and Mexico trade policy, tariffs, and the peso. Lower short rates would ease funding costs, but the balance sheet is asset-sensitive, so a sustained cutting cycle compresses the ~4.3% margin that produces most of the earnings. The ~$5.1 billion available-for-sale securities book carried roughly ~$350 million of unrealized losses against ~$3.4 billion of equity at mid-year, which limits flexibility to reposition without crystallizing them. Separately, an ERISA class action over the employees' profit sharing plan is pending in Texas federal court after being revived on appeal, a matter distinct from securities-fraud litigation, of which none is filed against the company.

We give no verdict on International Bancshares Corporation. Both cases are real, which is why the question is contested at all, so here is the strongest version of each.

The case for buying. A funding base that is hard to replicate. Interest expense fell to ~$98.3 million in the first half of 2026 even as deposits grew to ~$12.7 billion, because a large share of that base is low-cost and non-interest-bearing, much of it from cross-border commercial customers along the Texas border.

The case against. The second-quarter jump in non-accrual loans, from ~$140.3 million to ~$297.1 million on what the company describes as a single affordable housing relationship, is the live question, and the ~$170.0 million allowance covers only part of it.

Read the full bull and bear case on IBOC, including what would have to change to break either one. Walnut is not an investment adviser.

A simple financial snapshot. These are approximations and refresh quarterly; for current figures see International Bancshares Corporation's investor relations page or your broker.

• Revenue (TTM): ~$837.6M, net interest income plus fees
• Net income / diluted EPS (TTM): ~$413.3M and ~$6.64
• P/E and price to tangible book: ~11x and ~1.5x
• Return on assets / return on equity: ~2.4% and ~12.5%
• Efficiency ratio (H1 2026): ~38%
• Non-accrual loans: ~$297.1M, about ~3.0% of gross loans

The ~$837.6 million revenue line is net interest income plus fee income, not gross interest income, which is the reporting convention for banks: gross interest income alone ran ~$435.0 million in the first half of 2026. Profitability rather than growth is the story, with revenue moving from ~$798.9 million in 2023 to ~$827.1 million in 2025 while net income held near ~$410 million throughout, and the ~49% net margin is largely a function of that ~38% efficiency ratio. At roughly ~$73 a share and a ~$4.56 billion market cap, the market pays about ~11 times those earnings and ~1.5 times tangible book value of around ~$49.70 per share.

Other names that sit close to IBOC: same theme, named as a direct competitor, or held beside it in the same funds. Each entry says which. Worth a look if you are thinking about diversification within a thesis rather than concentration on one ticker.

There are three common ways to get IBOC exposure. Buy shares (or fractional shares) directly at any major broker. Hold an ETF that includes it, which spreads the position across many companies. Or build it into a focused thematic portfolio, so IBOC sits alongside other stocks that express the same thesis.

Walnut takes the portfolio route. Describe a thesis where IBOC fits (for example “AI infrastructure” or “dividend-growth large-caps”) and the AI proposes 5 to 6 constituents with target weights. You review the plan and fund it through your own broker when you're ready.

New to this? Start with how to invest in stocks, see how to analyze a stock with AI, or compare the best AI stock analyzers.

IBOC earns like an excellent bank and is priced like an average one, and the gap between those two facts now rests largely on whether one affordable housing credit relationship comes back.

Whether IBOC is worth buying today depends more on your time horizon and what you already hold than on any single call. We walk through valuation, what would have to go right, and the risks in is IBOC a buy or a sell?, and where the stock could go from here in the IBOC stock forecast.

For income investors, whether IBOC pays a dividend and how the payout looks is covered in does IBOC pay a dividend? And to weigh IBOC against a peer, read the full side-by-side comparisons: IBOC vs LUV and IBOC vs CFR.