Finding a good company is easy. Finding a business that can remain good for the next 10–20 years is much harder.
This is where Warren Buffett and Charlie Munger’s principles help. They teach us to look beyond quarterly numbers and ask a more important question: What makes this business durable?
Let’s break down their approach.
1. Business Economics Come First
- The Economic Moat
Buffett’s famous economic moat is essentially a durable competitive advantage that protects a business from competitors and allows it to earn attractive returns for a long time.
Think about Coca-Cola
If a competitor launches another cola, does Coca-Cola suddenly lose all its customers?
Probably not.
The brand, distribution, customer habits and consumer preference create a barrier that is difficult to replicate.
The same principle can be seen in businesses such as Page Industries, Gillette and Colgate-Palmolive.
The important point is that a moat is not simply high margins or a good product.
The real question is:
If I gave you billions of dollars and access to the best managers, could you build a company that successfully takes this business away from its customers?
If the answer is still no, you may be looking at a strong competitive advantage.
What Makes a Moat?
A moat can come from several sources:
Brand: Customers prefer the product even when alternatives exist.
Patent / Intellectual Property: Competitors cannot easily replicate the product or technology.
Distribution: A deeply established distribution network can be extremely difficult and expensive to reproduce.
Pricing Power: When costs rise, the company can increase prices without losing a significant portion of its customers.
Low Capital Intensity: The business can grow without continuously consuming large amounts of capital.
Predictable Earnings: Perhaps one of the most important characteristics for an investor. A business with stable demand, recurring consumption and relatively predictable margins makes future earnings easier to estimate. The more predictable the earnings, the easier it becomes to assess intrinsic value and the risk of being wrong.
And this is where I believe the moat becomes visible in the numbers.
Look for businesses that consistently generate high ROIC, ROE and ROA, while requiring relatively little incremental capital to grow.
But don't stop at a high ratio.
Ask:
Are these returns sustainable, repeatable and protected from competition?
The “Fool Can Run It” Principle
Buffett has often preferred businesses whose economics are so strong that they don't require extraordinary management every year to remain profitable.
That's an important distinction.
In a commodity business, even excellent management can struggle because the industry itself may have poor economics.
But when a strong moat exists, the business can survive an occasional management mistake without its entire economics falling apart.
The goal isn't to find a business that requires a genius to run it.
The goal is to find a business that remains good even when management is merely competent.
When the Moat Gets Tested
The real test of a moat often comes when a large, well-funded competitor enters the industry.
We have seen this play out in India's decorative paints industry with the entry of the Aditya Birla Group through Birla Opus, backed by significant manufacturing capacity and an established group distribution ecosystem challenges Asian Paints decade long dominance.
A similar competitive dynamic is emerging in wires and cables as same group entering with huge capacity.
And suddenly, the question changes.
It's no longer:
“How profitable is this company today?”
It becomes:
“Can this profitability survive a well-funded competitor?”
More capacity can lead to:
- Overcapacity
- Margin pressure
- Market-share battles
- Aggressive pricing
A smaller company then faces a difficult choice.
Protect margins and potentially lose market share—or protect market share by cutting prices and sacrifice margins.
Either way, EPS can come under pressure.
This is why historical ROE or margins alone don't prove the existence of a moat.
You need to understand what protects those returns.
2. Management Comes Second
Once we understand the business, we move to the second question:
Who is allocating the capital?
Buffett repeatedly emphasizes three qualities:
Intelligence, hard work and integrity.
But integrity comes first.
Why?
Because shareholders are essentially handing management their capital and trusting them to allocate it rationally.
The Owner's Mindset
Good management doesn't simply try to make the company bigger.
It thinks about per-share value.
Should the company reinvest?
Should it acquire another business?
Should it repay debt?
Should it buy back shares?
Or should it return cash to shareholders?
The answer depends on where management can generate the best return.
The $1 Test
This leads to Buffett's $1 Test.
Suppose a company earns ₹100 crore.
Management can retain that money and reinvest it—or distribute it to shareholders.
The important question is:
Can management create more than ₹1 of value for every ₹1 it retains?
If the business can reinvest capital at attractive returns, retaining earnings can create significant long-term compounding.
But if management keeps accumulating capital without generating adequate returns, shareholders may have been better served by receiving that money as dividends or through buybacks.
One way to examine this is to compare the growth in per-share earnings with the earnings retained over a period:
Return on Retained Capital = Increase in Per-Share Earnings ÷ Cumulative Per-Share Earnings Retained
The calculation is less important than the question behind it:
What did management actually do with the profits that belonged to shareholders?
At the end of the day, investing is not about finding the next multibagger.
It is about finding a business that can keep compounding when you are not watching.
A strong moat protects the business.
Good management protects the capital.
And time does the rest.
That is the kind of business Buffett and Munger taught us to look for.
