Equisigma Investor Academy – Sunday Learning Series

Topic 1: Understanding the Price-to-Earnings (P/E) Ratio

Why Every Investor Should Understand P/E

The Price-to-Earnings (P/E) ratio is one of the most widely used valuation tools in equity investing. It helps investors understand how much the market is willing to pay today for every Re1/- of a company's earnings. While it is simple to calculate, using it correctly requires context.

What is the P/E Ratio?

Formula: P/E Ratio = Market Price per Share ÷ Earnings Per Share (EPS)

Illustration

Item	Example
Share Price	500/-
EPS	25/-
P/E Ratio	500 ÷ 25 = 20

A P/E of 20 means investors are currently paying 20/- for every 1/- of annual earnings.

How to Interpret P/E

·         High P/E: Investors expect strong future growth.

·         Low P/E: The stock may be undervalued—or the business may have weak prospects.

·         Compare P/E only with companies in the same industry.

·         Always combine P/E with earnings growth, ROE/ROCE, debt and cash flow.

Real-World Style Examples

• A fast-growing consumer or retail business may trade at a high P/E because investors expect rapid earnings growth.

• A cyclical metals or commodity company may trade at a lower P/E because profits fluctuate with the business cycle.

When P/E Can Mislead

·         Loss-making companies have no meaningful P/E.

·         Temporary spikes in earnings can make P/E look artificially low.

·         High-quality businesses often deserve higher P/E multiples.

·         One-time exceptional gains or losses can distort EPS.

Practical Framework

Instead of buying a stock simply because its P/E is low, ask:1. Is earnings growth sustainable?2. Is the company generating healthy cash flows?3. Is debt under control?4. Does management have a strong execution record?5. Is the valuation reasonable relative to peers and growth?

Key Takeaways

·         P/E is a starting point, not the final decision.

·         Always compare companies within the same sector.

·         Use P/E alongside PEG, ROE, ROCE, debt and cash flow metrics.

·         A great business at a fair price is often a better investment than a weak business at a cheap price.

Equi sigma Insight

Successful investing is not about buying the lowest P/E stock—it is about paying a sensible price for a quality business with sustainable earnings growth.

Best Regards

Team Equisigma