Cover Image for Business Moat: a Durable Competitive Advantage That Increases the Odds of Your Investment Success

Business Moat: a Durable Competitive Advantage That Increases the Odds of Your Investment Success

Phil Town
Phil Town

Welcome to the introduction to Rule #1 course, I’m Phil Town and this is Tutorial 3: Moat (Part 1)- A Durable Advantage.

This is part 3 of a 9-part series on How to Invest using Rule #1 strategies

Part 1: Rule #1 Strategy- Overview of the Basics

Part 2: Meaning- The Three Circles

Part 3 [You are Here]: Moat- A Durable Advantage

Part 4: Moat- The Big Four

Part 5: Management- Owner Oriented

Part 6: Margin of Safety- The Growth Rate

Part 7: Margin of Safety- Sticker Price and MOS

Part 8: Margin of Safety- Payback Time

Part 9: Zombie Value- Tangible Book Value

Moat: What is it in Investing Terms?

As you may know:

A traditional moat refers to the water around a castle.

But did you know it's also an in investing terms?

Here's the deal:

A moat is a durable competitive advantage that a company has that protects it from being attacked by competitors.

A business moat is what makes a company predictable and allows us to put a value on the business.  Charlie Munger said that “Coca-Cola is the perfect business because it has this gigantic durable competitive advantage, or moat, which gives it predictable cash flow.” This allows us to figure out what the future cash flow will be and value the company today, so we know whether we can buy it on sale or not.

5 Kinds of Moats in Business

There are five kinds of moats: brand, secret, toll or toll bridge, switching, and price.

1) Brand Moat

An example of a brand moat is Harley-Davidson's notorious lifestyle branding. This approach has huge potential for brand building and Harley is brilliant at it. They've built a lifestyle around the Harley-Davidson culture which will always be tough for competitors to compete with.

2) Secrets Moat

The second of the five types is the secrets moat.

3M is brilliant at creating products around adhesives that they then patent and turn into products.  They’re a gigantic secrets company.

Another secrets company is Pfizer. They make Lipitor and a lot of other drugs that they patent and have exclusive rights to for many years.

A company like Dow Chemical, which creates a lot of products using their technology and secrets in the lab, that they then also patent. A secrets company is a big moat company.

3) Toll Bridge Moat

The next type of durable advantage is a toll bridge moat. A great example of that is Pacific Gas and Electric.  If you want to get power in California, then you pretty much have to go through PG&E.

Another toll bridge example is the Chicago Mercantile Exchange. They’re the only place in America where you can trade commodities. Burlington Northern Santa Fe Railroad is another example of this type because pretty much all the railroads in America have some sort of a monopoly.

4) Switching Moat

The next moat is found in business which make it costly to switch to different suppliers. This occurs when the cost of shifting from one supplier or product to another is too expensive for companies to consider.

For example:

Costs like redoing all of your software that links your network together are often so high, CEOs would not consider making a change. This is why it’s tough for companies to shift off of Microsoft, into say something like Apple.

Another company that has a nice switching moat is Intel. Once a company like Apple has built their computers on an Intel chip, it’s really hard for them to shift to some other competitor.

Another example is ADP Payroll Services. Once they get in your back office and start doing your payroll, they’re there forever. The cost to switch services is just too much.

5) Price Moat

The fifth moat is centered around price.  Walmart of course is the king of price moats, as the company can create or sell products much, much lower than anybody else.

Costco also competes on that basis, as does JetBlue, for example.


You might notice that a lot of these companies have multiple moats. Certainly, businesses can have multiple durable advantages.

In fact:

The more the better.

But you will find that every good company has at least one of these kinds of moats: brand, secret, toll bridge, switching, or price.

Make sure that with any company that you are looking at buying, you can identify at least one. Your job is to look into industries you understand so you can recognize companies with strong business moats.

Your homework for this tutorial is to take the company that you found in the last tutorial, and figure out what type of moat that company has. Is it a brand, secret, toll bridge, switching, or price moat?  Now, go on to Tutorial 4: Moat (Part 2)- The Big Four Numbers.

Related reading:

How to Invest Money:A Simple Guide to Grow Your Wealth in 2019

Investing in Stocks 101: A Guide to Stock Market Investments

Investing Calculators to Help You with Rule #1 Analysis