CHAIN BRIDGE BANCORP INC (CBNA) stock intrinsic value fair value estimate & owner earnings analysis

Chain Bridge Bancorp owns Chain Bridge Bank, a single-office national bank in McLean, Virginia (about $2.2 billion of assets at June 30, 2026), plus a trust and wealth business ($773 million under administration). Its real business is holding deposits for political organizations: campaign, party and PAC committees, nearly all affiliated with the Republican Party. It has been the depository bank for every Republican presidential nominee since the 2008 cycle. About 80% of deposits pay no interest, and the bank keeps most of that money at the Federal Reserve or in short Treasury bills, with only about $300 million of mostly home loans. So its profits come down to two things: how much money political clients park with it, and where short-term interest rates are. Both swing a lot. Deposits build ahead of each federal election, flow out around it, and then rebuild. Excess balances are placed with other banks through the IntraFi network for a fee, and that fee income jumps in election years ($8.6 million of fee and other income in 2024 against $3.5 million in 2025). The bank's own rate model shows net interest income falling about 12% for every 1 point cut in rates. Net income was $4.9 to $8.3 million a year in 2019-2022, when rates were near zero, $8.8 million in 2023, $20.9 million in 2024 and $20.2 million in 2025. It was $16.6 million in the first half of 2026 as deposits hit $2.0 billion ahead of the midterms. How we measured earnings. We start from cash generated by operations and take out working-capital swings and upkeep spending on property. There is no stock-based pay; incentive pay is cash. Only 2023-2025 are available on this basis, since the company went public in October 2024: about $2.53, $4.12 and $1.92 per share. We adjusted two things in 2025. About $3.5 million of interest earned on Treasury bills acquired at a discount does not show up as operating cash until the bills mature, even though it is real interest. And the $4.1 million spent that year was mostly one-time buildout of new office space for the trust business, not upkeep. Adjusted for both, 2025 comes to about $3.00 per share. We treat 2024-2025 as one full two-year election cycle. On today's 6.56 million shares, and at roughly today's short-term rates (about 3.9%), that cycle averages about $3.10-3.20 per share. That is the anchor. Last year's earnings per share fell about 27% on this adjusted basis, partly because of the new shares issued at the IPO. We still start the coming year a little higher, at $3.30, because year-end 2025 deposits were 26% above year-end 2024 and first-half 2026 profit ($16.6 million) was already well above the first half of 2025 ($10.2 million). Base case ($44.80): earnings of about $3.20 per share a year across election cycles for 20 years, then fading to nothing over the following decade. We assume no growth. More deposits would need new clients or more political fundraising, and neither is secured. The 18-year record with Republican presidential campaigns supports the franchise lasting, but it is not a contract. The bank pays no dividend, so its capital (about $28 per share of book value, held mostly in cash and Treasuries) builds up. We count about $25 per share of that capital as coming back to owners when the franchise winds down at the end of the story. Bear case ($23.80): short-term rates fall by about 2 points. That has happened before: rates were near zero in 2009-2015 and 2020-2021, and the bank's own model puts the hit at about a quarter of net interest income. On top of that, the bank loses one of its large political clients (two accounts each held more than 5% of deposits at the end of 2024). Earnings drop to about $1.60 per share, roughly the 2021 level scaled to today's bank, then fade to zero over 20 years as the franchise erodes. Capital is returned as the balance sheet shrinks. Bull case ($58.50): rates hold near today's level and the larger 2026 deposit base proves durable. Earnings average about $4.30 per share per cycle, in line with the 2026 run-rate averaged with an off-year, for 20 years before fading. Credit risk is low, since most assets are cash and government securities. The real risks are concentration and rates. Most deposits can come from political organizations at some points in the cycle, and nearly all of them are tied to one party. A change in campaign-finance rules, fundraising platforms or party banking relationships could shrink the bank quickly, and none of that is under the bank's control. The valuation is wrong if the Republican committees move their banking elsewhere, or if short-term rates go back to zero and stay there. With only three years of public cash-flow statements, the earnings history before 2023 comes from the company's earlier reported net income, not a full cash-flow build. The margin-of-safety price is about $26. That is roughly 40% below the base value and close to the bear value, a wide margin that reflects the client concentration, the rate sensitivity and the company's small size.