P/E Ratio Explained for Beginners | The Asset School
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Equity & Stock MarketsValuation Mastery9 min read

Key Stock Ratios: P/E, P/B, ROE & Dividend Yield

Master the four cornerstone valuation and profitability metrics used by seasoned investors to determine if a stock is a bargain, fairly priced, or a dangerous value trap.

Core Takeaways for Indian Investors
  • ✓P/E (Price-to-Earnings) reveals how many rupees you pay for ₹1 of annual company net profit. It gauges market growth expectations and flags valuation bubbles.
  • ✓P/B (Price-to-Book) compares market capitalization to tangible net assets. It is the primary metric for banks and NBFCs, but unhelpful for asset-light tech and FMCG companies.
  • ✓ROE (Return on Equity) measures management’s compounding efficiency with shareholder capital. Over the long run, investor returns closely mirror sustained business ROE.
  • ✓Dividend Yield measures annual cash returns per share. Beware of "yield traps" where a crashing stock price artificially inflates trailing dividend yields.
  • ✓The Golden Synergy Rule: Never evaluate any ratio in isolation. Use P/E and P/B to assess price, ROE and ROCE to verify quality, and Dividend Payout to verify cash reality.

#1Ratio 1: P/E Ratio (Price-to-Earnings) — What You Pay for ₹1 of Profit

The Price-to-Earnings (P/E) ratio is the single most widely quoted valuation metric in the global financial markets. In simple terms, it answers one fundamental question: "For every ₹1 of annual profit this company generates, how many rupees of purchase price am I willing to pay today?" Mathematically: • P/E Ratio = Current Market Price per Share ÷ Earnings Per Share (EPS) • Or: Total Market Capitalization ÷ Total Annual Net Profit If Infosys trades at ₹1,600 and generates ₹64 of annual profit per share, its P/E ratio is ₹1,600 ÷ ₹64 = 25. You are paying 25 years of current profits to own the business. If the company never grows earnings and pays out 100% of profits, it will take 25 years to recoup your purchase price (an earnings yield of 1 ÷ 25 = 4%).
💡THINK OF IT THIS WAY (REAL-WORLD ANALOGY)
Practical Sizing Guide

Imagine two neighborhood shops in your city:

🏪 1. Sharmaji's Daily Kirana Store (FMCG Archetype):

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Scale: Earns ₹10 Lakhs predictable profit every single year come rain, shine, or recession.
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Growth & Risk: He wants to sell the shop to you for ₹50 Lakhs (P/E = 50 ÷ 10 = 5x).
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In Your Portfolio: High earnings visibility, zero debt, dependable cash flows justify a premium multiple.

🏬 2. Vermaji's Seasonal Wedding Sherwani Tailor (Cyclical Commodity Archetype):

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Scale: In a bumper wedding year, he makes a massive ₹50 Lakhs profit. He offers to sell for ₹2 Crores (P/E = 200 ÷ 50 = 4x).
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Growth & Risk: Looks dirt cheap at 4x P/E! But next year, auspicious wedding dates drop by half and profit plunges to ₹5 Lakhs. Your real P/E instantly balloons to 40x!
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In Your Portfolio: Never evaluate cyclical profits with a single year's P/E multiple. Always normalize earnings across a full 5-to-7 year economic cycle.

Trailing (TTM) vs Forward P/E

Valuation Trap Watch
Beware Analyst Over-Optimism

• Trailing P/E is grounded in concrete, audited facts from the past 12 months. However, it looks backward into the rearview mirror. • Forward P/E reflects future optimism. When analysts predict a company’s profits will surge 50%, a stock with a 30x TTM P/E appears to have an attractive "Forward P/E" of only 20x. • Risk: Indian brokerage analysts are notoriously optimistic during bull markets. If the projected profit boom fails to materialize, the stock crashes as its multiple compresses!

Sector Baselines: Why FMCG Trades at 60x and Steel at 8x

Context Matters
Never Compare Apples to Oranges

• FMCG (HUL, Nestle, Britannia): Trades at 50x–70x P/E because daily consumption (soap, tea, biscuits) is virtually immune to recessions, generates negative working capital, and requires zero debt. • IT Services (TCS, Infosys): Trades at 22x–30x P/E due to predictable dollar-denominated multi-year enterprise contracts and 80%+ cash conversion. • Cyclical / Commodities (Tata Steel, Vedanta): Trades at 6x–10x P/E at peak commodity prices. Counter-intuitively, cyclical commodity stocks are most dangerous when their P/E looks cheapest!

The P/E Value Trap

Danger Signal
Cheap for a Terrifying Reason

• A stock trading at a single-digit P/E (e.g., 6x) is not automatically a bargain. It could be a "Value Trap" — a company facing technological obsolescence, loss of market share, corporate governance misconduct, or one-off asset sale profits that will never recur. • Golden Rule: A high-quality company at 25x P/E with a 20% sustainable growth runway is vastly superior to a dying business at 7x P/E with zero growth.

The Peter Lynch PEG Ratio

Growth vs Value
Price/Earnings-to-Growth

• Developed by legendary Fidelity Magellan fund manager Peter Lynch to bridge the gap between Value and Growth investing. • Formula: PEG = P/E Ratio ÷ Expected Annual EPS Growth Rate (%). • Example: Company A has a P/E of 30 and grows earnings at 35% annually (PEG = 30 ÷ 35 = 0.85). Company B has a P/E of 15 but grows at only 5% annually (PEG = 15 ÷ 5 = 3.0). • Company A is mathematically much cheaper relative to its growth engine!

▸Trailing Twelve Months (TTM) P/E: Calculated using actual reported audited earnings from the past 4 quarters.
▸Forward P/E: Uses estimated consensus earnings projected by Wall Street or Dalal Street analysts for the upcoming financial year.
▸Nifty 50 Historical Benchmark Zones: P/E below 18 represents rare deep-value accumulation (e.g. 2008 crash, March 2020 COVID); 18 to 22 is fair value; above 25 represents elevated euphoria.
▸The Peter Lynch PEG Filter: PEG = P/E ÷ Annual EPS Growth Rate (%). A PEG below 1.0 indicates growth at a reasonable price, while a PEG above 2.0 flags potential overvaluation.

#2Ratio 2: P/B Ratio (Price-to-Book) — Buying Net Assets vs Paying for Brand Air

While P/E looks at a company's income statement (profits), the Price-to-Book (P/B) ratio looks directly at the balance sheet (net worth). It compares what the stock market is charging for the company against the liquidation value of its physical assets if the company were shut down today. Mathematically: • Book Value (Net Worth) = Total Assets – Total External Liabilities • Book Value Per Share (BVPS) = Total Book Value ÷ Total Outstanding Shares • P/B Ratio = Current Share Price ÷ Book Value Per Share (BVPS) If State Bank of India (SBI) has a book value of ₹420 per share and trades in the market at ₹750, its P/B ratio is ₹750 ÷ ₹420 = 1.78x. Investors are paying ₹1.78 for every ₹1 of net assets owned by the bank.

Why Banks Live and Die by P/B

Financial Sector Core
Loan Book Quality is Everything

• A bank’s balance sheet IS its core business engine. It takes deposits (liabilities) and lends them out as mortgages, car loans, and corporate credit (assets). • Premium private banks (HDFC Bank, Kotak Bank, ICICI Bank) historically trade between 2.2x and 3.5x P/B because their underwriting discipline prevents loan defaults. • PSU Banks often trade between 0.8x and 1.5x P/B due to historic asset quality swings and government ownership constraints.

The Asset-Light Distortion

Accounting Reality
Why Titan Trades at 15x+ P/B

• Standard accounting rules (Ind-AS / IFRS) do not allow companies to record internally generated brand value or software source code as assets on the balance sheet. • Titan, Asian Paints, and Nestle create enormous profits with very little physical capital employed. Their P/B ratios look sky-high (15x to 35x), but this is not a sign of overvaluation; it is a sign of an extraordinary economic moat!

The Danger of P/B < 1.0 (Value vs Distress)

Balance Sheet Audit
Don't Buy Obsolete Assets

• If a textile or steel mill trades at 0.4x P/B, retail investors assume they are buying a rupee for 40 paise. • Reality Check: If the factory machinery is 25 years old and technologically obsolete, it cannot be sold for scrap value. If inventory cannot be sold and receivables turn into bad debt, the real book value is actually zero! • Always verify whether the book value consists of real cash and performing loans or illiquid legacy junk.

Tangible Book Value (TBV)

Refined Metric
Stripping Out Goodwill

• When a company acquires other businesses at an expensive premium, it creates an accounting item called "Goodwill" on its asset sheet. • Tangible Book Value per share subtracts Goodwill and intangible assets from total equity. • Using Price-to-Tangible-Book (P/TBV) protects conservative investors from sudden write-downs when past overpriced acquisitions fail.

▸The Banking & Lending Standard: For Banks and NBFCs, P/B is the primary valuation metric because their balance sheet assets (loan books) are financial contracts marked to market.
▸Asset-Light Blindspot: Companies like TCS, Infosys, Titan, or Zomato possess minimal factory machinery. Their greatest assets are human talent, software IP, and brand trust, none of which appear on balance sheet book value.
▸P/B below 1.0 (Discount to Book): Can signal either an extraordinary deep-value opportunity or a severe red flag where bad loans (NPAs) or obsolete assets will wipe out book value.
▸Graham Net-Net Margin of Safety: Father of value investing Benjamin Graham searched for stocks trading below two-thirds of their net current asset value (NCAV).

#3Ratio 3: ROE (Return on Equity) — Management's Compounding Engine

If P/E and P/B tell you what a stock costs, Return on Equity (ROE) tells you how good the underlying business actually is. It measures how many rupees of net profit management generates from every ₹100 of net shareholder capital entrusted to them. Mathematically: • ROE (%) = (Net Annual Profit after Taxes ÷ Shareholders’ Equity) × 100 Why Warren Buffett and Charlie Munger prioritize ROE above all else: "Over the long term, it is hard for a stock that earns 6% on capital to earn more than 6% per year, even if you buy it at an attractive discount. Conversely, if a business earns 20% on capital over 25 years, even if you pay an expensive-looking price, your returns will end up close to 20%."
💡THINK OF IT THIS WAY (REAL-WORLD ANALOGY)
Practical Sizing Guide

Consider two real-world Indian business models:

🥐 1. The D-Mart (Avenue Supermarts) Model — Asset Turnover Power:

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Scale: Supermarket grocery margins are thin (Net Margin ~4.5% to 5.5%).
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Growth & Risk: How do they generate strong 15%–18% return on equity? Through blistering inventory turnover! Goods arrive, sell in 18 days, and cash is reinvested immediately.
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In Your Portfolio: High operating efficiency makes low-margin businesses highly lucrative compounders.

🏢 2. The Infrastructure Developer Trap — Debt Leverage Illusion:

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Scale: Builds toll roads with ₹10 Crores equity and ₹90 Crores borrowed from banks at 11% interest.
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Growth & Risk: In year 1, toll collection shows a deceptive 22% ROE on the tiny ₹10 Cr equity base. But in year 3, inflation spikes, toll traffic slows by 15%, loan interest eats 100% of revenue, and equity is entirely wiped out!
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In Your Portfolio: Never invest in capital-heavy infrastructure without checking Debt-to-Equity (< 0.5 preferred).

DuPont Analysis: Deconstructing ROE

Forensic Tool
ROE = Margin × Turnover × Leverage

DuPont analysis breaks ROE down into three distinct operating drivers: 1. Net Profit Margin (PAT ÷ Revenue): Pricing power and cost discipline. 2. Asset Turnover (Revenue ÷ Total Assets): Asset efficiency — how many times assets turn into sales. 3. Equity Multiplier (Total Assets ÷ Equity): Financial leverage — how much bank debt is used. • High-quality ROE is powered by high margins (Titan) or high turnover (D-Mart), NOT by piling on debt!

The Leverage Illusion (Fake ROE)

Red Flag Alert
Beware Debt-Inflated ROE

• Example: Company X has ₹100 Cr Equity, ₹0 Debt, and makes ₹20 Cr Profit → ROE = 20%. • Company Y has ₹10 Cr Equity, ₹90 Cr Debt (Total capital ₹100 Cr), and makes ₹2.5 Cr Profit after paying heavy interest → ROE = ₹2.5 Cr ÷ ₹10 Cr = 25%! • An amateur screener ranks Company Y higher because 25% > 20%. In reality, Company Y is a debt-choked disaster one quarterly slowdown away from bankruptcy!

ROE vs ROCE (Return on Capital Employed)

Vital Distinction
Equity vs Total Capital

• ROE measures returns only on shareholder equity (PAT ÷ Net Worth). • ROCE measures operating profit generated from ALL long-term capital (EBIT ÷ [Equity + Long-term Debt]). • For companies with debt, ROCE is the superior metric because it cannot be artificially manipulated by borrowing money. Always check both ROE and ROCE together.

The Reinvestment Compounding Equation

Wealth Multiplier
Intrinsic Growth = ROE × Retention

• A company cannot grow intrinsic value faster than its Return on Equity unless it raises external capital. • Intrinsic Growth Rate = ROE × (1 – Dividend Payout Ratio). • If an Indian franchise earns 28% ROE and retains 75% of profits (paying out 25% as dividend), its earnings compounding engine runs at 28% × 0.75 = 21% per year!

▸The 12% Indian Hurdle Rate: The risk-free 10-year Indian Government Bond (G-Sec) yields ~7%. Adding an equity risk premium of 5% means any Indian company earning less than 12% ROE is destroying economic value!
▸Outstanding Compounders in India: Elite franchises (TCS, Titan, Page Industries, Abbott India) consistently sustain ROEs between 25% and 40%+ without debt.
▸Reinvestment Velocity: A 25% ROE business that reinvests 80% of its profits back into expanding stores, factories, or technology compounds intrinsic value at 20% per year (25% × 80%).
▸The DuPont 3-Way Breakdown: Reveals whether high ROE stems from high profit margins, rapid asset turnover, or dangerous financial leverage.

#4Ratio 4: Dividend Yield & Payout — Cash in Hand vs Reinvestment

While capital appreciation provides long-term wealth, dividends represent tangible cash deposited directly into your bank account. Dividend Yield measures this immediate cash return relative to the stock's market price. Mathematically: • Dividend Yield (%) = (Annual Cash Dividend per Share ÷ Current Share Price) × 100 If Coal India declares an annual dividend of ₹24 per share and its stock trades at ₹380, its dividend yield is (₹24 ÷ ₹380) × 100 = 6.31%. This cash yield easily rivals a 1-year Bank Fixed Deposit, with the added benefit of equity capital appreciation over time. However, total investor return is always: Total Shareholder Return (TSR) = Capital Appreciation + Dividend Yield. A high dividend yield is meaningless if the underlying stock price declines by 20% every year!

The Dividend Payout Ratio Health Check

Sustainability Metric
Dividends Paid ÷ Net Income

• 0% to 20%: Typical for fast-growing small-caps and mid-caps reinvesting all earnings into new production capacity, hiring, and R&D. • 30% to 60%: Ideal balanced "sweet spot" for mature leaders (TCS, Infosys, ITC). Rewarding shareholders while funding future growth internally. • 80% to 100%+: Red flag warning! The company is paying out more than it retains, starving itself of future growth capital or taking on debt to maintain payout optics.

Spotting the High-Yield Trap

Retail Investor Danger
12% Yield with 50% Capital Loss

• Retail investors frequently gravitate toward PSU commodity or paper companies yielding 9%–12%. • The Math Trap: Stock was ₹400 and paid ₹40 dividend (10% yield). Commodity prices crash, company profits drop 80%, stock price collapses to ₹160. • Next year, dividend is slashed to ₹4. The investor lost ₹240 in capital to earn ₹40 in dividends!

Taxation Realities for Indian Investors

Post-Tax Impact
Income Slab vs 12.5% LTCG

• Prior to 2020, Dividend Distribution Tax (DDT) was paid by companies. Today, dividends are taxed directly in the investor's hands at their slab rate. • For an investor in the 30% tax bracket, a 6% dividend yields only ~4.1% post-tax. • By contrast, long-term capital gains (LTCG) in Indian equities are taxed at a concessional 12.5% (above ₹1.25 Lakhs exemption). Growth compounding is vastly more tax-efficient!

Dividends as an Accounting Truth Serum

Forensic Hygiene
Profits are Opinion, Cash is Fact

• Unethical promoters can inflate reported earnings through fake debtor entries, capitalized expenses, or premature revenue recognition. • However, a company that has paid steady, growing cash dividends into shareholder bank accounts for 15 consecutive years proves that its reported profits are backed by cold, hard cash flow.

▸Dividend Payout Ratio: Dividends Paid ÷ Net Profit. A healthy payout ratio for mature cash cows is 30% to 60%. A payout over 90% leaves zero money for capital expenditure or emergencies.
▸The Dividend Yield Trap: Dying companies whose stock price dropped 70% show an artificially massive 12% trailing yield right before management cuts the dividend to zero.
▸Indian Tax Drag: Under the Finance Act 2020, dividends are taxed at your ordinary income tax slab rate (up to 31.2% or 39% with highest surcharge) + 10% TDS under Section 194 if annual dividend exceeds ₹5,000.
▸Dividends as Forensic Proof: Accounting books can be manipulated to show fictional paper profits, but dividends require real, verifiable cash to leave the company’s bank account.
How to Invest: Step-by-Step Execution Routes
India Practical Guide

How to use free Indian stock screening platforms (like Screener.in, TickerTape, or Trendlyne) to filter high-probability investment candidates using these four ratios.

The Warren Buffett Quality Compounder Screen

Demat Required
Min Investment: ₹1,000 (Via fractional or direct stock purchases)
Ideal For: Long-term equity investors seeking steady 15%–20% compounding with minimal downside risk.
Steps to Invest:
1.Open Screener.in and create a new custom query.
2.Apply quality filters: Return on Equity (ROE) > 18% AND Return on Capital Employed (ROCE) > 20% over 5-year average.
3.Apply solvency filters: Debt to Equity < 0.5 (Ensures ROE is organic, not debt-fueled).
4.Apply valuation filters: PEG Ratio < 1.5 AND P/E Ratio < 45.
5.Check Cash Flow: Free Cash Flow (FCF) > 0 for at least 4 out of the past 5 years.

The Sound Banking & Lending Institution Screen

Demat Required
Min Investment: ₹1,000
Ideal For: Investors seeking exposure to India’s credit growth story (Banks and NBFCs).
Steps to Invest:
1.Filter for financial institutions: Return on Equity (ROE) > 15% AND Return on Assets (ROA) > 1.4%.
2.Apply asset quality safety filters: Net NPA (Non-Performing Assets) < 1.0% AND Provision Coverage Ratio (PCR) > 70%.
3.Apply valuation filter: Price to Book (P/B) < 2.5x.
4.Verify Capital Adequacy Ratio (CAR): CAR > 15% (Ensures regulatory resilience against loan defaults).

The Sustainable Cash Flow & Dividend Screen

Demat Required
Min Investment: ₹1,000
Ideal For: Conservative or retired investors seeking steady passive income that beats bank fixed deposits.
Steps to Invest:
1.Filter for dividend yield: Dividend Yield > 3.0% AND Dividend Yield < 7.0% (Avoids dangerous yield traps).
2.Filter for payout health: Dividend Payout Ratio between 30% and 65%.
3.Filter for growth resilience: 5-year Sales Growth > 8% AND Operating Profit Margin > 15%.
4.Ensure zero promoter pledge: Promoters holding > 50% with zero shares pledged to lenders.
In-Depth Advantages & Disadvantages
Advantages & Strengths
  • ✓Objective Screening: Instantly filters through 5,000+ listed NSE/BSE companies to find candidates worthy of deep investigation.
  • ✓Prevents Valuation Euphoria: Buying companies with extreme triple-digit P/E multiples historically leads to prolonged periods of stagnation.
  • ✓Quality Separation: ROE and ROCE instantly distinguish high-moat wealth compounding franchises from commodity businesses.
  • ✓Cash Verification: Dividend history and payout ratios act as an accounting truth serum verifying reported net profits.
Risks & Limitations
  • ✗Backward-Looking Nature: Ratios calculated on trailing data reflect the past 12 months, not what will happen in the next 3 years.
  • ✗Accounting Discrepancies: Promoter-driven aggressive accounting (capitalizing expenses, changing depreciation methods) can distort EPS and Book Value.
  • ✗Sector Incompatibilities: Applying the same P/E or P/B criteria across different industries leads to catastrophic errors (e.g., calling HUL expensive vs Tata Steel).
Risk & Investor Verdict: Fundamental ratios are diagnostic health indicators, not automated buy/sell buttons. Always combine P/E and P/B (valuation) with ROE and ROCE (business quality), Debt-to-Equity (solvency), and Free Cash Flow (cash reality) before committing a single rupee.
Cornerstone Stock Valuation Ratios At A Glance
How each ratio evaluates a company, its healthy benchmark in India, and its primary blindspot.
Stock RatioMathematical FormulaCore Question It AnswersHealthy Indian BenchmarkPrimary Blindspot / When It Fails
P/E (Price-to-Earnings)Market Price ÷ EPSHow many rupees am I paying for ₹1 of annual company profit?15x – 25x (Sector dependent)Misleading for cyclical commodity peaks; blind to debt leverage; susceptible to one-off extraordinary gains.
P/B (Price-to-Book)Share Price ÷ Book Value Per ShareHow much am I paying relative to net liquidation asset value?1.5x – 3.0x for Banks; < 4.0x for asset-heavyCompletely useless for asset-light software, FMCG, and consumer franchises with massive intangible brand equity.
ROE (Return on Equity)(Net Profit ÷ Shareholders' Equity) × 100How efficiently does management compound shareholder money?> 15% to 20%+ (Must beat 12% Cost of Equity)Can be artificially inflated by loading the balance sheet with dangerous bank debt (leverage illusion).
Dividend Yield(Annual Dividend ÷ Current Price) × 100What cash yield does my bank account receive relative to price?1.5% – 4.0% for steady mature cash cowsThe "Yield Trap": collapsing stock prices make declining cyclical businesses appear deceptively attractive.
PEG Ratio (Bonus Filter)P/E Ratio ÷ Annual EPS Growth Rate (%)Am I overpaying for expected profit growth?< 1.0 (Bargain/Fair); > 2.0 (Expensive)Relies entirely on estimated future growth projections which may fail to materialize in downcycles.
Head-to-Head Comparison
CriteriaP/E Ratio (Earnings Multiplier)P/B Ratio (Balance Sheet Anchor)
Financial Statement AnalyzedIncome Statement (Profit & Loss / EPS)Balance Sheet (Assets minus Liabilities / Net Worth)
Best Suited SectorsFMCG, Consumer, IT Services, Pharma, AutoBanks, NBFCs, Housing Finance, Infrastructure, Utilities
Meaningless / Ineffective ForLoss-making companies or early-stage startups with ₹0 profitsAsset-light tech, internet platforms, digital media, IP-driven biotech
Impact of Excessive DebtHigh interest payments artificially depress EPS, inflating P/ETotal liabilities reduce Book Value, making P/B appear very high
Key Diagnostic TrapValue Trap (cheap 6x P/E due to permanent business decline)Distress Trap (0.4x P/B because loan book or factories are junk)
Knowledge Check: Test Your Understanding
1 Question

Company Alpha has an ROE of 26% and Debt-to-Equity of 0.1. Company Beta has an ROE of 30% and Debt-to-Equity of 4.5. Which company represents a fundamentally superior compounding engine?