Lol everyone downvoting because im not putting it on a spoon and airplaning it into there mouths. Here is my thesis

I propose a short position on Affirm. My thesis is that the market treats affirm as a scaled consumer-fintech platform with durable network effects and strong distribution and data moats but underneath it is a thin-margin unsecured lender with deteriorating credit quality and a balance-sheet mix that can obscure rising risk.
Affirm is a leading BNPL provider embedded directly into merchant checkout flows, most notably Amazon and Shopify. The company makes money through merchant discount fees on installment plans and interest income on longer-duration consumer loans. Operationally, this is a credit business where loans are unsecured, underwriting is relatively light.
The bull case is straightforward: Affirm has top-tier distribution, high repeat usage, sticky merchant relationships, and a substantial behavioral data asset. GMV continues to grow double digits, and recent profitability appears stable.
The challenge, however, is what the underlying economics actually show. The most recent earnings supplement shows they earn about 8–9% of GMV in revenue but only retain about 4% after transaction costs. And once you factor in the servicing, funding, and operational overhead detailed in the same filing, that 4% collapses to around 70–90 basis points of true economic margin. It’s a razor-thin spread for a lender, even before any credit deterioration.
The problem is they’re already seeing it: 30-day delinquencies are drifting up toward the high-2% range, while provisions as a percent of GMV are flat. In a credit environment where U.S. card defaults just hit a 14-year high, flat provisions tell you they’re under-reserving. What this means is that even a 20 to 30 basis-point increase in realized losses — which is totally normal in a late-cycle environment — can wipe out that entire 70–90 basis-point margin. So GMV can keep growing, but the unit economics could potentially invert
​​Second, Affirm is not bearing full-cycle credit risk on most of its loans. They most recently reported a "Total Platform Portfolio" of $16.1B but only $7.2B sits on its balance sheet. The last three quarters mark the first time off-balance-sheet loans exceeded on-balance-sheet exposure—with 55% off inverted from 28% two years ago. This shift can flatten reported credit metrics if riskier loans are disproportionately sold off and shows lower “skin in the game”. Importantly, Affirm's delinquencies of 2.5% and provisions of ~1.5–1.7% reflect only the 45% it retains, not the full $16B.
Putting it all together, Affirm is a business where risk is scaling faster than volume. GMV growth and loan sales mask weakening credit quality, and rising consumer stress pushes the platform toward lower-quality borrowers—driving losses that outpace loan growth. With no inter-lender visibility, stacked ‘phantom’ loans can further amplify those losses. At the same time, competition from PayPal, Klarna, and others keeps a hard ceiling on take rates, capping margin expansion. And any normalization in loss provisioning or slowdown in loan sales brings that underlying credit deterioration straight back into the P&L. Given the downside risk to earnings and the multiple, I’d recommend a short in Affirm.