What is a Stock?
A stock (also known as equity or share) represents ownership in a publicly traded company. When you buy a stock, you become a partial owner of that company and may be entitled to:
- Dividends: A portion of company profits distributed to shareholders
- Capital Appreciation: Profit from rising stock prices
- Voting Rights: Ability to vote on company decisions (for common stock)
- Claim on Assets: Right to company assets in case of liquidation
Types of Stocks
- Common Stock: Voting rights, variable dividends, higher risk/reward
- Preferred Stock: Fixed dividends, no voting rights, priority in liquidation
- Growth Stocks: Companies expected to grow faster than the market
- Value Stocks: Undervalued companies trading below intrinsic value
- Blue Chip Stocks: Large, well-established, financially stable companies
- Penny Stocks: Low-priced, highly speculative stocks
What is an Index?
A stock index is a measurement of a section of the stock market. It's calculated from the prices of selected stocks and provides a snapshot of market performance.
Popular Stock Indices
- S&P 500 (SPX): 500 largest U.S. companies by market cap. The most widely followed benchmark for U.S. equities.
- Dow Jones Industrial Average (DJIA): 30 large, publicly-owned U.S. companies. Price-weighted index.
- NASDAQ Composite: All stocks listed on the NASDAQ exchange. Heavy tech concentration.
- Russell 2000: 2,000 small-cap U.S. companies. Benchmark for small-cap performance.
- FTSE 100: 100 largest companies on the London Stock Exchange.
- DAX: 40 major German companies on the Frankfurt Stock Exchange.
- Nikkei 225: 225 top-rated Japanese companies on the Tokyo Stock Exchange.
Stocks vs. Indices: Key Differences
| Aspect | Individual Stocks | Indices |
|---|---|---|
| Risk | Higher (company-specific) | Lower (diversified) |
| Volatility | Can be very high | Generally lower |
| Research Required | Extensive (per company) | Moderate (macro focus) |
| Potential Returns | Higher ceiling | Market average |
How to Trade Indices
- Index Futures: Contracts to buy/sell an index at a future date (ES, NQ, YM)
- ETFs: Exchange-traded funds that track indices (SPY, QQQ, IWM)
- Index Options: Options contracts on indices or ETFs
- CFDs: Contracts for Difference (not available in U.S.)