STATE STREET CORP (STT) stock intrinsic value fair value estimate & owner earnings analysis

State Street is one of the world's largest custody banks. Its Investment Services business holds, settles, prices and administers securities for pension funds, mutual funds, ETFs, insurers and sovereign funds ($53.8 trillion of assets under custody and/or administration at the end of 2025), and its Investment Management arm, State Street Global Advisors, runs $5.67 trillion including the SPDR ETF family. In 2025 about 79% of the $13.9 billion of revenue was fees (servicing fees $5.3 billion, management fees $2.4 billion, plus foreign exchange trading and securities lending) and about 21% was net interest income earned on client deposits invested in securities and central-bank balances. About 43% of revenue is booked outside the United States. The business is sticky: switching a custodian is a multi-year, high-risk project for a client, and State Street had a further $2.5 trillion of already-won mandates waiting to be installed at the end of 2025. How we measured earnings. Because a bank's operating cash flow swings by billions with client collateral, FX derivative marks and settlement balances, we start from net income and add back only genuine non-cash charges: deferred taxes, amortization of acquired intangibles (about $223 million a year, mostly customer relationships from acquisitions such as Charles River Development; the remaining $935 million runs off over roughly five years), depreciation of premises, equipment and software, and gains or losses from selling securities. We do not add back the reported 'depreciation, amortization and accretion' line as a whole, because it mixes in the premium amortization and discount accretion on the bond portfolio, which is part of the interest the bank actually earns, and lease amortization whose cash cost is already counted elsewhere; using it would have flattered 2020-2021 by about $600 million a year and understated 2024-2025 by about $230-340 million a year. Credit loss provisions are kept as a cost. We then subtract stock-based pay (about $220-310 million a year), maintenance spending on technology and premises (capital spending of $0.6-1.1 billion a year, less a small allowance for growth), and the $226 million of preferred dividends that rank ahead of the common. Repositioning and severance charges ($326 million in 2025) recur nearly every year and were left in as a normal cost. On this basis earnings available to common owners were $2.3 billion in 2017, $2.6 billion in 2018, $2.2 billion in 2019, $2.5 billion in 2020, $2.6 billion in 2021, $3.0 billion in 2022, $2.0 billion in 2023 (a year hit by deposit outflows, the FDIC special assessment and lower fees), $2.8 billion in 2024 and $2.6 billion in 2025. Starting point. We use the median of 2021-2025, which spans near-zero rates, the fastest rate rise in decades and the 2023 regional-bank stress: $2.64 billion, or $9.40 per share on the 281 million diluted shares outstanding in mid-2026. We work from total earnings divided by today's share count rather than from older per-share figures, because the share count swung from a 2021 equity issue to $3.8 billion of buybacks in 2023. Buybacks are treated as a use of owner earnings, not as extra growth. Owner earnings per share were flat in 2025 versus 2024 ($9.14 both years). We nevertheless start the base case with 8% growth in 2026 because the first two quarters of 2026 are already filed: net income available to common was $1,731 million versus $1,227 million a year earlier, with revenue up 16.5% and expenses up 10%. We give only part of that gain credit, because much of it comes from higher market levels lifting asset-based fees, and capital spending in the first half of 2026 jumped to $945 million from $545 million. Base case ($187.50 per share; about $52.7 billion for the common). 2026 owner earnings of about $10.16 per share, then growth of 1.5% a year through 2035 and flat after that. The 1.5% is at or below what the business has actually delivered: total revenue grew about 2.7% a year from 2017 to 2025 through two downturns, while earnings to common grew about 1.6% a year, held back by steady fee-rate pressure (in 2025 assets under custody rose 16% but servicing fees rose only 6%). Beyond 2035 we credit a flat level with no growth, because the custody franchise is the kind of structural position that has demonstrably persisted, but nothing we can evidence supports growth that far out. Credited growth: the installed-mandate backlog and the long record of winning new mandates. Left out: further market appreciation, the margin target management talks about, and any benefit from buybacks. Bear case ($116.83 per share; about $32.8 billion). Earnings hold at about $9.40 in 2026, then a downturn of the kind custody banks have actually lived through: a broad fall in market values that cuts asset-based fees, together with a collapse in interest rates of the 2020-2021 kind (net interest income fell 26% from 2019 to 2021). We take owner earnings down 35% for two years, deeper and longer than the one-year 32% fall from 2022 to 2023, and charge a one-time loss of about $2.6 billion (one full year of earnings) for securities losses or an operating failure, in the spirit of the 2008-2009 crisis when State Street had to absorb balance-sheet losses and raise new equity. Earnings recover to only 90% of today's level, stay there through 2035, and then shrink 1% a year forever as fee compression outruns new business. At 11.6% common equity tier 1 against its own 10-11% target, a loss of that size would cut the ratio by roughly two points on our estimate and leave it above regulatory minimums, so we do not assume forced dilution. The bear value is about twice tangible common equity of roughly $54 per share. We think that is justified: even at the worst point of this case the bank earns about $6 per share a year from fees that do not depend on taking credit risk, and its loan book is small relative to its balance sheet. Bull case ($232.67 per share; about $65.4 billion). Something like the first-half 2026 pace carries 2026 up 15% to about $10.81, then growth of 2.7% a year through 2035, matching the demonstrated long-run revenue growth as the $2.5 trillion backlog installs and new mandates keep arriving at the 2025 pace ($2.1 trillion won, $2.1 trillion installed), and 1.5% a year for 2036-2045 before going flat. Debt and preferred stock. For a bank, deposits and borrowings are the raw material of the business, so interest is already counted as an operating cost and no debt is subtracted. The $3.6 billion of preferred stock is handled by deducting its dividends before common owners are paid. Each case leaves earnings well above those preferred dividends in every year, and no maturity or covenant materially affects the result. Our previous estimates for State Street were prepared on a different basis and are not comparable with these figures. Margin-of-safety price. We are fairly sure of the earnings level: nine years of results fall between $2.0 billion and $3.0 billion, and the worst year came from a genuine banking scare plus one-off charges, not from a broken business. The worst plausible outcome is a crisis that combines falling markets, near-zero rates and a large operational, cyber or securities loss at a bank holding trillions of client assets on thin equity (about $28 billion against $418 billion of assets in mid-2026). Its structure would very likely survive: it is regulated as a systemically important bank, its revenue is spread across a broad base of institutional clients, and its assets are mostly cash at central banks and high-grade bonds. What we are most likely to be wrong about is fee-rate compression running faster than new business, the share of 2026 earnings that came from rising markets, and the higher technology spending. If all three went against us, the shares would be worth something near the bear case. At $100 the starting owner earnings of about $9.40 are a yield of over 9%, of which about $3.36 a year is paid as dividends and most of the rest has gone to buybacks. If the price only reaches the bear value within a year, the bear case implies a return close to 20%, and if it moves toward the base value over three to four years the base case implies about 20% a year or better. The margin-of-safety price is $100.