Stanford Quants Launch Castle to Hedge Macro Risks for Small Businesses

menhguin · x · 2026-08-14

Startup Castle aims to address hidden macro risk exposures on corporate balance sheets.

Core Insight: Many companies unintentionally carry macro event risks (e.g., an airline is an embedded oil trade, a data center is a bet on permits clearing). These intangible risks lack historical data and remain unprotected.
Solution: Founded by former quantitative traders, Castle leverages market models to cover risks that insurers won't, providing liquidity for these exposures so businesses can focus on operations.
Origin: Four Stanford grads left their plush quant jobs and spent weeks with goat herders in the Central Valley to understand small business risks, leading to Castle's creation.

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