C8 Model Assurance

C8 Model Assurance brings C8's independent library of rules-based indices into Claude: bank quantitative investment strategies, annuity crediting indices and structured-note underlyings, each rebuilt by C8 from its public rulebook and checked against the sponsor's published levels.

For every index in the library you can ask:

• What the rule is, as C8 read it, and what the sponsor can still change at its discretion.
• Whether it reproduces: the daily tie-out between C8's rebuild and the published levels.
• Whether the published parameters were found or picked: the calibration grade, from a test across the full parameter grid, with the grid itself.
• How the live period compares with the sponsor's backtest before launch.
• What it does to a 60/40 book at a weight you choose, and its calendar-year and worst months.

Figures are month-end levels with their source and window stated: the sponsor's published index, C8's rebuild, SPY, AGG and a 60/40 book. Each index's level series can be handed to C8 Allocator Agent to test it inside your own portfolio.

Model Assurance is information for advisers and investment teams. It gives no recommendation to buy, sell or hold, no forecast and no view on suitability, and nothing it shows is an offer. The library holds only public rulebooks, published index levels and C8's own computations. No tool stores or changes anything. Access is included with a C8 Allocator Agent subscription during the pilot; you connect with your subscription email and a one-time code, with no API keys.