What is P/E Ratio?

 

💡 What is P/E Ratio?

P/E Ratio = Price of 1 Share ÷ Earnings per Share (EPS)

Think of it like this:

If you’re buying a business, how many years of its current profit will it take to recover what you paid?
That’s exactly what the P/E ratio tells you.

---

🧾 In Simple Terms:

• A low P/E means the stock is cheap compared to how much money the company is making.

• A high P/E means the stock is expensive, or the market has high hopes for its future growth.

---

📊 Example – Indian Stock: Infosys Ltd

Let’s say:

• Share Price = ₹1,500

• EPS (Earnings per Share) = ₹75
  👉 P/E Ratio = 1500 / 75 = 20

➡️ That means you're paying ₹20 for every ₹1 the company earns annually.

So, if Infosys keeps earning the same, it would take 20 years to get back what you paid — in pure profit terms.

---

🌍 Example – Global Stock: Apple Inc.

• Share Price = $200

• EPS = $10
  👉 P/E Ratio = 200 / 10 = 20

Again, you’re paying $20 for every $1 of Apple’s earnings. Just like Infosys.

---

🎯 What is a Good P/E Ratio?

There’s no one-size-fits-all, but here's a helpful range:

Stock Type	P/E Range	What it means
5 – 15	Low	Undervalued or slow-growth
15 – 25	Fair/Moderate	Steady growth, market average
25 – 50	High	High growth expected
50+	Very High	Market is VERY optimistic

🔎 Benchmark:

• Nifty 50 average P/E: ~20–25

• S&P 500 average P/E: ~20–22

---

🚦 How to Spot a Good Stock Using P/E Ratio

✅ Step 1: Compare with Peers

Don’t look at P/E in isolation. Compare with:

• Other companies in the same industry

• The company’s own historical P/E

Ex: If TCS has a P/E of 25 and Infosys has 18, Infosys might be cheaper relative to TCS.

✅ Step 2: Check Growth vs. P/E

• High P/E might still be good if earnings are growing fast.

For instance, a tech startup might have a P/E of 40, but earnings growing 30–40% yearly.

✅ Step 3: Watch for Very Low P/E

• A very low P/E can mean undervalued stock…

• Or it can be a red flag (declining business, poor future).

Example: A PSU (Public Sector Unit) stock with a P/E of 6 might be cheap. But it could also mean no growth ahead.

---

📌 Bonus Tip: PEG Ratio

PEG = P/E Ratio ÷ Expected Growth Rate

• PEG ~1 = Fairly valued

• PEG < 1 = Possibly undervalued

• PEG > 1 = Overvalued

---

🧠 Final Thoughts (Quick Summary)

• P/E = How many years you pay to earn back your money.

• Use it to compare across similar companies.

• Combine with growth, debt, management quality for smarter investing.

• A low P/E doesn't always mean a good buy — look at the full story.