Arch Capital Group

Arch’s business in specialty insurance and reinsurance does not exhibit a durable economic moat. It has no network effect, and customer switching costs are low – policyholders can change carriers or brokers relatively easily in insurance markets.

Arch’s advantages stem from its size, underwriting expertise, and access to capital, but these are not exclusive barriers. Its brand is modest outside industry circles, and competitors (catastrophe reinsurers, specialty insurers) are numerous.

In short, Arch benefits from scale and underwriting discipline, but we would not call this a sustainable moat. The score reflects a narrow/no moat view.