The mechanism: Realty Income doesn't pay a dividend because it's generous — it pays because the tax code forces it to. Under IRC Section 857, a REIT must distribute at least 90% of its taxable income to shareholders annually in exchange for a corporate-level deduction that effectively erases its federal income tax bill. That single provision is the entire business model: no REIT wrapper, no 5.6%-yielding "monthly dividend company," no premium multiple on a portfolio of Walgreens and Dollar General boxes. Every time Washington opens the corporate tax code — to fund a spending bill, close a "loophole," or hunt for pay-fors on a deficit-reduction package — the REIT dividends-paid deduction sits in the drawer of options tax writers reach for, because uncapping it or means-testing it raises real revenue from a sector that pays essentially zero corporate tax today. The 2025 One Big Beautiful Bill Act left the core structure untouched and even loosened REIT subsidiary limits, but that's exactly the point: durable tax treatment survives friendly legislation and gets targeted in unfriendly legislation. Realty Income's stock price embeds an assumption that Section 857 never changes.

Who cashes in: Nobody profits from this risk existing — it's a pure tail exposure — but the mechanism's stability is a genuine tailwind for scale-advantaged REITs that would survive any transition better than smaller peers. Prologis (PLD), the largest industrial REIT, has diversified enough cash flow and development-fee income (through its taxable REIT subsidiary capacity, just expanded from 20% to 25% of assets under the 2025 tax law) to absorb a partial haircut to the dividends-paid deduction better than a single-tenant retail REIT. American Tower (AMT) similarly benefits from TRS flexibility and international diversification that reduces dependence on the U.S. REIT wrapper specifically. Homebuilders D.R. Horton (DHI) and PulteGroup (PHM) are structurally insulated entirely — they're taxed as ordinary C-corps already, so any REIT-specific reform is a non-event for them and could even redirect yield-seeking capital toward homebuilder dividends and buybacks if REIT after-tax yields compress.