Valuation Ratios: The Mathematics of the Price Tag

In the previous pillars, we learned how to dismantle the engine (Balance Sheet) and check the fuel flow (Cash Flow). But even if an engine is magnificent, you shouldn’t buy it if the price is insane.

In first-principles terms, Valuation Ratios are the tools we use to compare the Price (the ticket) to the Value (the ride).

Is a ₹5,000 stock “Expensive”? Is a ₹10 stock “Cheap”? You cannot answer this without looking at Ratios. Ratios allow you to normalize the data so you can compare a giant like Reliance with a small-cap startup. Let’s break down the three most critical ratios for the Indian market.

1. Price-to-Earnings (P/E) Ratio: The “Payback Period”

This is the most famous ratio in the world.
Formula: `Market Price per Share ÷ Earnings per Share (EPS)`

First Principle: The P/E ratio tells you the Payback Period in years (assuming the profit stays constant).

• If a company has a P/E of 20, it means the market is asking you to pay ₹20 for every ₹1 of annual profit. It will take 20 years for the company to “earn back” your investment.

The Pro Insight: A high P/E (e.g., 80) is not always bad. It means the market expects the company’s profit to Explode in the future. You are paying a premium for growth. A low P/E (e.g., 5) is not always good. It might mean the company is a “Value Trap” and its profits are about to crash.

2. Return on Equity (RoE): The “Internal Interest Rate”

This is the ultimate measure of management quality.
Formula: `Net Profit ÷ Shareholders’ Equity`

First Principle: RoE is the Interest Rate the company generates on its own capital.
Imagine you give a company ₹100. If they use that money to generate ₹20 in profit, their RoE is 20%.

• The Test: If the RoE is lower than the interest rate of a Fixed Deposit (around 7%), the company is actually destroying wealth. You are better off putting your money in the bank.
• The Goal: Look for Indian companies with a consistent RoE above 15% to 20% (like Asian Paints or Titan). These are “Compounding Machines.”

3. Price-to-Book (P/B) Ratio: The “Asset Price”

Formula: `Market Price per Share ÷ Book Value per Share`

First Principle: The P/B ratio tells you how much you are paying for the Physical Hardware of the company.

• If P/B is 1.0, you are buying the assets at their exact cost price.
• If P/B is 5.0, you are paying ₹5 for every ₹1 of assets.

When to use it: P/B is the most important ratio for Banks and Financial Institutions (C3 Spoke Banking Stocks). For technology companies (like TCS), P/B matters less because their “assets” are human brains, which don’t show up on a balance sheet.

4. ROCE (Return on Capital Employed): The Pure Efficiency

While RoE looks at the “Owner’s Money,” ROCE looks at All the Money (Equity + Debt).

First Principle: ROCE measures the True Mechanical Efficiency of the engine.
A company might have a high RoE just because they took a massive loan. But ROCE tells you if the entire machine is profitable regardless of how it was funded. Always check both. If RoE is much higher than ROCE, the company is playing a dangerous game with high debt.

Summary Table: The Valuation Cheat Sheet

The “Smart Friend” Advice

Ratios are Relative. A P/E of 30 for an IT company (TCS) might be “Cheap,” while a P/E of 30 for a Steel company (Tata Steel) might be “Extremely Expensive.” Always compare a company’s ratios to its Industry Average and its own 10-year Historical Average.

Congratulations! You have completed the Pillar Hubs of Cluster 3. You now possess the scientific tools to evaluate any business in India.

Now, let’s look at the specific practical skills—like reading an Annual Report—that turn these ratios into a winning portfolio.

Move to C3 Spoke 1: How to Read an Annual Report in 30 Minutes to start your deep-dive research.

Frequently Asked Questions