FIBK vs ZION: Which Is the Better Buy in 2026?

Same yardstick, side by side (as of August 2026). Valuation lined up like this is most meaningful for two names in the same corner of the market, which these are. Figures are approximate; verify before investing.

Reading it: ZION is the cheaper of the two on forward earnings, but cheaper is not the same as better. Pair the valuation with growth (how far the forward P/E sits below the trailing P/E) and risk (beta) before you decide.

The metrics above tell you which is the marginally better business. The bigger risk for most people is not picking the slightly worse stock, it is over-concentrating. FIBK and ZION share themes, so owning both, or adding either to what you already hold, can quietly push a large share of your portfolio into one bet.

This is the part a generic comparison page cannot answer, because it depends on what you own. Connect your brokerage and Walnut shows your real, combined FIBK and ZION exposure, flags overlap with your existing positions, and tells you if adding one would tip you past a concentration you are comfortable with, read-only by default, with your login staying at your broker. Walnut is not an investment adviser.

First Interstate BancSystem is a financial services holding company headquartered in Billings, Montana, and the parent of First Interstate Bank, a community bank with more than 300 branches spread across roughly 14 Western and Midwestern states including Montana, Wyoming, the Dakotas, Colorado, Oregon, and Nebraska. It is the largest bank based in Montana by assets, carrying roughly $27 billion in total assets, and it earns most of its money the traditional way: gathering local deposits and lending them out to consumers, small businesses, agriculture, and commercial real estate borrowers, supplemented by wealth management and payments fees.

Full FIBK guide

Zions Bancorporation, National Association is a regional bank holding company headquartered in Salt Lake City with roughly $89 billion in total assets at the end of 2025. It runs a collection of locally managed and separately branded banks, including California Bank & Trust, Amegy Bank in Texas, National Bank of Arizona, Nevada State Bank, and Vectra Bank Colorado, serving small and mid-sized businesses, commercial clients, and retail customers across 11 western states. Its core business is gathering deposits (about $73.8 billion) and lending them out, with roughly $59.6 billion of loans spread across commercial and industrial, commercial real estate, residential mortgage, and consumer credit.

Full ZION guide

Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.

• FIBK drivers: Net interest margin recovery; Capital return.
• ZION drivers: Net interest margin recovery; Western small-business and commercial franchise.

A faster-growing, richer-valued name usually swings harder, so it suits a longer horizon and a higher tolerance for volatility; a steadier, more cash-generative business suits a more conservative or income-minded investor. The honest test is which set of risks you could hold through a drawdown: As a regional bank, FIBK is exposed to interest rate swings that can compress margins and mark down its securities portfolio. For ZION, the largest risks are credit and interest-rate related.

Growth-minded investors who believe the theme has years to run tend to accept the richer multiple for more upside; value-minded investors lean toward the cheaper forward earnings and steadier profile. Pick FIBK if you believe its drivers more; ZION if you believe its. Many investors hold both, but since they share themes, that is a concentrated bet, not diversification. Decide deliberately and check overlap. For the full detail, see the FIBK and ZION guides.

FIBK. FIBK reported net income of about $60 million, or $0.61 per diluted share, in the first quarter of 2026, up from $0.49 a year earlier as margin improved. The stock trades around a mid-teens earnings multiple and roughly book value, typical for a slower-growth regional bank. The heavy dividend yield near 5% is a defining feature of the valuation and reflects both the payout policy and the market's modest growth expectations.

ZION. Zions trades at a low-single-digit-multiple valuation typical of regional banks, with a trailing P/E near 9.5x and return on equity around 14%. Q1 2026 net earnings of about $232 million were up roughly 37% year over year, helped by a wider margin and higher fee income. Analyst price targets in 2026 clustered in the high-$60s to mid-$70s, reflecting a mix of optimism on operating leverage and caution on credit.

Headline figures (approximate, July 2026): FIBK shows total revenue (ttm) ~$1.05B, diluted eps (q1 2026) ~$0.61, net interest margin ~3.41%, market cap ~$3.7B; ZION shows revenue (2025 net revenue) ~$3.4B, net interest income (q1 2026) ~$662M, diluted eps (q1 2026) ~$1.56, market cap ~$9.2B.

FIBK and ZION are related but distinct: same themes, different businesses and risks. Neither wins in the abstract; the right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme. Walnut can show your combined FIBK and ZION exposure against your real portfolio. It is not an investment adviser.