Patents, licences and regulatory moats

Some moats are granted by law rather than earned in the market. Patents, licences and regulation can legally lock competitors out — a powerful protection, but one with a clock on it.

Patents and intellectual property

A patent gives a company the exclusive legal right to sell an invention for a set period, letting it earn high returns with no direct competition. This is most visible in pharmaceuticals, where a patented drug can be extraordinarily profitable.

The weakness is built in: patents expire. When they do, competition floods in and prices collapse — the famous "patent cliff". A company whose profits rest on a single patent has a moat with a known expiry date, so you must ask what fills the gap when protection ends. A pipeline of continuous innovation is a far more durable advantage than any one patent.

Licences and regulation

Sometimes regulation itself is the moat. Where operating requires a hard-to-obtain licence, or where rules are so complex and costly to comply with that newcomers cannot afford to enter, incumbents are protected:

• Limited licences — a small number of casino, banking, or telecom licences in a region.
• High compliance barriers — heavily regulated industries where the cost and expertise to comply keeps challengers out.

The double edge of regulation

Regulatory moats cut both ways, which makes them less comfortable than they look. The same government that grants protection can withdraw it, cap prices, force competition, or change the rules entirely. A company whose advantage depends on regulation also carries regulatory risk — a single political decision can widen the moat or fill it in. Treat legal moats as real but fragile: valuable while they last, but always ask how secure and how long-lived the protection truly is.