01 · THE FUNDAMENTAL CHAIN
Core Mechanism
How fundamentals flow into market prices
🏭
GDP Growth
Economy expands
→
📈
Revenue Growth
Companies sell more
→
💰
EPS Growth
Earnings per share rises
→
🎯
Intrinsic Value ↑
PE × EPS = Fair price
×
🎭
Sentiment (PE)
What investors will pay
📊
MARKET PRICE
= EPS × PE multiple
Market Return = EPS Growth + Dividend Yield ± PE Change
// Over 10+ years, PE change ≈ 0 (mean reversion)
⚠ Approximate — based on historical Indian market data. Pre-1990 data reconstructed. Not a guarantee of future returns.
02 · THE 5 KEY FUNDAMENTALS
Fundamental 01
P/E Ratio — The Valuation Gauge
What you pay for ₹1 of earnings. The single most watched market valuation metric.
PE↓
Market cheap → buy signal
Future returns historically higher. "Blood on streets" = opportunity.
PE↑
Market expensive → caution
Future returns compressed. High optimism already priced in.
⚠ PE-return relationships are historical patterns (1990–2025 data). Not a prediction. Pre-2021 PE calculated on standalone basis — not comparable to post-2021.
Fundamental 02
EPS Growth — The Real Engine
Earnings per share is the only truly sustainable driver of long-term returns.
40×
SENSEX GROWTH
SAME PERIOD
≈ EQUAL
PRICE FOLLOWS
EARNINGS
⚠ EPS figures are approximations. Sensex composition changed significantly over 30 years.
Fundamental 03 + 04
ROE & GDP — Quality + Scale
ROE tells you how efficiently a company uses capital. GDP tells you the size of the ocean.
ROE RULE
High ROE + low debt = quality moat. Such companies deserve higher PE — comparing a 40% ROE company to an 8% ROE company by PE alone is wrong.
GDP RULE
Corporate profits ≈ 6–8% of GDP. A 7% GDP growth economy delivers ~10–12% nominal EPS growth. India's structural story is what makes the long-term bull case.
⚠ GDP-EPS relationship is approximate. Actual corporate profit share varies by economic cycle.
03 · WHEN FUNDAMENTALS SPOKE — DID YOU LISTEN?
BSE Sensex 1990–2025 (Log Scale)
Price follows earnings. PE mean-reverts. Every time.
Sensex (log)
PE ratio (right axis)
● Bubble peak
● Crash buy
⚠ Approximate data. Pre-1995 PE figures reconstructed. Not primary source data. For illustration only.
Historic Episodes
What fundamentals were signalling
1992
PE 50× ← DANGER
Harshad Mehta Bubble
Sensex 4× in 2 years, PE hit 50×. Earnings barely moved. The gap was entirely sentiment. Crashed 56% when scam broke.
Mar 2009
PE 8× ← OPPORTUNITY
Global Financial Crisis Bottom
FIIs pulled ₹65,000 Cr. Sensex –61%. But India's GDP grew 6.7%. Earnings intact. PE 8× was the buying opportunity of the decade.
2003–2007
PE 10× → 28×
The Great Bull Run
EPS grew 25–30%/yr. GDP at 8–9%. Sensex 7× in 5 years. This was earnings-driven — the cleanest fundamental bull market in Indian history.
2016–2019
PE 21× → 28×
PE Expansion Without Earnings
Demonetisation + GST stalled EPS. But Sensex kept rising on hope. Mid/small caps eventually crashed 40–60% when reality bit.
Mar 2020
PE 16× ← BUY
COVID Crash
Sensex –38% in 40 days. But corporate balance sheets were strong. Those who bought at PE 16× saw 200%+ returns by 2022.
04 · VALUATION ZONES & INTERACTIVE SIMULATOR
Historical PE Zone Analysis (Approximate · 1990–2025)
What PE zone you enter at determines what you likely get out
| Zone | PE Range | Market Mood | 3yr Hist. CAGR | 5yr Hist. CAGR | Time Spent |
|---|
| Deep Value |
< 10× |
Extreme panic |
28–35% |
22–28% |
|
| Undervalued |
10–14× |
Fear & doubt |
18–25% |
16–20% |
|
| Fair Value |
14–22× |
Cautious optimism |
12–18% |
11–15% |
|
| Overvalued |
22–30× |
Greed & euphoria |
4–10% |
6–12% |
|
| Bubble |
> 30× |
FOMO & mania |
–5 to +2% |
0–5% |
|
⚠ Return ranges are historical pattern summaries — not fitted regression models. Actual outcomes varied widely. NSE PE methodology change in Apr 2021 makes historical comparison imperfect. Educational estimate only.
Interactive Tool · Heuristic Only
Return Estimator
Adjust inputs to see historical pattern-based estimates. Not a prediction or model.
⚠ Heuristic formula — not a statistical model. Returns depend on many factors this tool cannot capture. Consult a SEBI-registered advisor.
05 · THE PROOF — EARNINGS DRIVES PRICE
Decade by Decade · Approximate Data
When EPS grew fast, markets compounded. When it didn't, they didn't.
Sensex CAGR %
EPS CAGR %
Real return (after ~7% inflation)
⚠ Decade return figures are approximate. Actual returns depended on exact entry/exit dates. Inflation adjustment uses estimated CPI averages.
The Core Insight
One equation. 46 years. Still holds.
Long-run return
≈ EPS Growth
+ Dividend Yield (~1.5%)
± PE change (~0% long-term)
THE PROOF (APPROX.)
Sensex EPS: ₹80 (1992) → ₹3,500 (2025)
That is 43× earnings growth.
Sensex: 2,000 → 80,000 = 40× price growth.
Price tracked earnings. Exactly. Over 33 years.
Short-term: PE is everything. Markets move on sentiment, news, fear, greed. But hold for 10+ years — PE noise cancels out. The only thing that remains is how much the underlying businesses grew their earnings.
⚠ EPS figures are estimates. Sensex composition changed. Past relationships may not repeat. This is educational context, not a forecast or recommendation.
FULL DATA ACCURACY & EDUCATIONAL DISCLAIMER
What is real: Sensex base 100 (Apr 1979), 18.6% CAGR since inception, current level ~80,000 — these are publicly recorded. The 6 major market episodes described are real historical events. The core formula (Return ≈ EPS + Dividend ± PE) is an established financial identity, not invented here.
What is approximate: PE figures pre-1995 are reconstructed estimates — BSE used full market-cap weighting, not free-float, making early data unreliable. EPS figures are approximations. The PE-to-return tables are pattern summaries from published research (Capitalmind, RetireWire), not fitted statistical regressions.
Methodology change: NSE changed its PE calculation in April 2021 from standalone to consolidated earnings. This caused the published PE to drop ~20% overnight — not because markets got cheaper. Pre and post-2021 PE figures are not directly comparable.
What this tool cannot capture: Global capital flows, monetary policy, geopolitics, currency, index composition changes, and black swan events. No model predicts the future.
⚠ This platform is NOT registered with SEBI. Nothing here is investment advice. This data has not been verified by a SEBI-registered research analyst. Always consult a qualified, SEBI-registered investment advisor before making any financial decision. The creators accept no liability for investment decisions made based on this content.