Stock Markets

Learn how stock markets work, how companies are valued, and how to start investing in equities with confidence.

A stock market is an exchange where buyers and sellers trade ownership stakes in publicly listed companies. When you buy a share, you become a part-owner of that company. Stock markets are the most powerful long-term wealth-building vehicles available — the S&P 500 has returned approximately 10.4% annually since 1957, and Nifty 50 has returned roughly 12–14% CAGR since inception.

How Stock Markets Work

Companies raise capital by selling shares to the public through an Initial Public Offering (IPO). After listing, those shares trade on exchanges between investors — the company does not receive money from secondary market transactions.

Primary market: IPO — company sells new shares to raise capital
Secondary market: Exchange trading — existing shares change hands between investors
Price discovery: Driven by supply and demand, earnings expectations, and macroeconomic factors
Market hours: India (NSE/BSE) — 9:15 AM to 3:30 PM IST; US (NYSE/NASDAQ) — 9:30 AM to 4:00 PM EST

How to Value a Stock

Valuation determines whether a stock is cheap or expensive relative to its earnings power and growth prospects.

P/E Ratio (Price-to-Earnings): Stock price ÷ EPS. Lower can mean value; higher means growth expectations
EPS (Earnings Per Share): Company profits divided by total shares outstanding
Market Cap: Share price × total shares — classifies companies as large, mid, or small-cap
P/B Ratio (Price-to-Book): Useful for banks and asset-heavy companies
Free Cash Flow: Actual cash generated after capex — the truest measure of profitability

How to Start Investing in Stocks

Getting started is straightforward. You need a brokerage account and a basic understanding of what you are buying.

India: Open a Demat + trading account with Zerodha, Groww, or Upstox (takes 1–2 days online)
US: Open an account with Fidelity, Charles Schwab, or TD Ameritrade ($0 minimum, $0 commission)
Start with index funds or ETFs before picking individual stocks
Invest only money you will not need for at least 5 years — markets are volatile short-term
Use SIP/dollar-cost averaging to invest regularly regardless of market levels

Direct Stocks vs Index Funds

Most individual investors underperform the index because stock picking is genuinely difficult. Index funds offer a simpler, more reliable path to market returns.

Approach	Expected Return	Time Required	Risk	Suitable For
Index Fund/ETF	Market average (~12% CAGR)	Minimal	Market risk only	Most investors
Diversified Equity MF	Market ± 2-3%	Low (periodic review)	Market risk	Beginners to intermediate
Direct Stock Picking	Varies widely	Significant	Company + market risk	Experienced investors

💡 Pro Tip: If you are unsure where to start, invest in a Nifty 50 or S&P 500 index fund via monthly SIP and keep adding for 20+ years. This alone has made thousands of ordinary people wealthy.

Key Takeaways

✓Stocks represent ownership in businesses — their value follows business performance long-term
✓Index funds reliably beat most active fund managers over 10+ year periods
✓Time in the market beats timing the market — stay invested through volatility
✓Diversify across sectors and geographies to manage company-specific risk
✓Invest via SIP to benefit from rupee/dollar-cost averaging