The stock market is a marketplace where buyers and sellers trade shares of publicly listed companies. It's one of the most powerful wealth-building mechanisms available to ordinary people — and one of the most misunderstood. Here's everything a beginner needs to know.
Primary vs Secondary Markets
In the primary market, companies raise capital by issuing new shares to the public for the first time — this is an IPO (Initial Public Offering). In the secondary market, investors trade those shares among themselves. The price you see quoted on exchanges is the secondary market price. Companies don't receive money from secondary market trades.
Major Stock Exchanges
- NYSE (New York Stock Exchange) — largest by market cap; home to many blue chips
- NASDAQ — technology-heavy exchange; home to Apple, Microsoft, Google
- LSE (London Stock Exchange) — Europe's largest exchange
- TSE (Tokyo Stock Exchange) — Asia's largest exchange
- SSE (Shanghai Stock Exchange) — China's primary exchange
Key Market Indices
Indices track the performance of groups of stocks. The S&P 500 tracks the 500 largest US companies. The Dow Jones Industrial Average tracks 30 major US companies. The NASDAQ Composite tracks all NASDAQ-listed stocks. When news says 'the market was up today,' it usually means one of these indices rose.
Bull Markets and Bear Markets
A bull market is a period of rising stock prices — generally defined as a 20%+ rise from a recent low. A bear market is a 20%+ decline from a recent high. Bull markets historically last longer than bear markets and produce larger gains than bears produce losses. Since 1926, the US market has been in a bull market about 78% of the time.
Market Hours and Trading Mechanics
US stock markets trade Monday through Friday, 9:30 AM to 4:00 PM Eastern Time. Pre-market and after-hours trading exists but has lower volume and wider spreads. Buy/sell orders are matched electronically; market orders execute immediately at current prices, while limit orders execute only at a specified price or better.
Long-Term Historical Performance
The US stock market has returned approximately 10% per year on average (7% after inflation) over the past century. Every decade has included significant downturns — but patient, diversified long-term investors have historically been rewarded. Past performance doesn't guarantee future results, but the historical evidence for patient investing is very strong.
Don't try to time the market. Time in the market beats timing the market. Set up automatic investments and focus on the long term.
