What time does the stock market open?

The US stock market (NYSE and NASDAQ) opens at 9:30 AM Eastern and closes at 4:00 PM Eastern, Monday through Friday. Pre-market trading runs from 4:00 AM to 9:30 AM, and after-hours trading runs from 4:00 PM to 8:00 PM.

How much money do you need to buy stocks?

With fractional shares, you can buy stocks for as little as $1. Major brokerages like Fidelity, Schwab, and Robinhood offer fractional share investing with no account minimums.

What is a stock market index?

A stock market index tracks the performance of a group of stocks. The S&P 500 tracks 500 large US companies, the Dow Jones tracks 30 blue-chip stocks, and the NASDAQ Composite tracks over 3,000 stocks listed on the NASDAQ exchange.

What causes stock prices to go up and down?

Stock prices are driven by supply and demand. Factors include company earnings, economic data, interest rates, investor sentiment, industry trends, and geopolitical events. In the short term, prices are driven by emotion; in the long term, by fundamentals.

Should I invest in individual stocks or index funds?

Most experts recommend index funds for the majority of your portfolio. Research shows that over 90% of actively managed funds underperform the S&P 500 over 15-year periods. Index funds offer instant diversification at minimal cost.

What is a bull market vs a bear market?

A bull market is when stock prices are rising (generally 20%+ from recent lows) and investor confidence is high. A bear market is when prices fall 20%+ from recent highs. Historically, bull markets last much longer than bear markets.

Stock Market: How It Works & How to Invest in 2026

What Is the Stock Market?

The stock market is a collection of exchanges where stocks (shares of ownership in companies) are bought and sold. Think of it as a massive marketplace where millions of investors trade ownership stakes in companies every day.

When a company "goes public" through an IPO (Initial Public Offering), it lists its shares on a stock exchange, allowing anyone to buy and sell those shares. The two largest US stock exchanges are the New York Stock Exchange (NYSE) and NASDAQ.

The US stock market has a total market capitalization of over $50 trillion, making it the largest in the world. Over 58% of American households own stocks directly or through retirement accounts.

How the Stock Market Works

At its core, the stock market operates on supply and demand. When more people want to buy a stock than sell it, the price goes up. When more people want to sell than buy, the price goes down.

Here's the basic flow:

A company issues shares through an IPO on a stock exchange
Investors buy shares through brokerages (Fidelity, Schwab, Robinhood, etc.)
Buy and sell orders are matched electronically in milliseconds
Stock prices fluctuate based on company performance, economic conditions, and investor sentiment
Investors profit through capital gains (price increase) and dividends (profit sharing)

Major Stock Market Indices

Stock market indices track groups of stocks to represent the overall market or specific sectors:

S&P 500: Tracks 500 of the largest US companies. Widely considered the best benchmark for the overall US market. Average annual return: ~10% since inception.
Dow Jones Industrial Average (DJIA): Tracks 30 large, well-known US companies (blue chips). The oldest and most recognizable index.
NASDAQ Composite: Tracks 3,000+ stocks on the NASDAQ exchange. Heavily weighted toward technology companies.
Russell 2000: Tracks 2,000 small-cap US companies. A benchmark for small company performance.

View live market data for all major indices.

How to Buy Stocks

Open a brokerage account: Choose a broker with no commissions and no minimums. Compare top brokerages.
Fund your account: Transfer money from your bank. Most brokers support instant deposits.
Research stocks: Analyze companies using fundamental analysis (financials, earnings, growth) or use index funds for broad exposure.
Place an order: Use a market order for immediate execution or a limit order to set your price.
Monitor and manage: Track your portfolio, but resist the urge to trade frequently.

Stock Order Types Explained

Market Order: Buy or sell immediately at the current market price. Fastest execution, but you don't control the exact price.
Limit Order: Set a specific price. The order only executes at your price or better. More control, but may not fill.
Stop-Loss Order: Automatically sell if a stock drops to a certain price. Limits your downside risk.
Stop-Limit Order: Like a stop-loss but converts to a limit order instead of a market order.

Fundamental vs Technical Analysis

Fundamental Analysis

Evaluates a company's intrinsic value by examining financial statements, earnings, revenue growth, profit margins, debt levels, and competitive advantages. Key metrics include P/E ratio, EPS, revenue growth, and free cash flow.

Technical Analysis

Studies price patterns and trading volume to predict future price movements. Uses charts, moving averages, RSI, MACD, and other indicators. More commonly used for short-term trading.

Market Hours and Trading Sessions

Pre-Market: 4:00 AM - 9:30 AM ET (lower volume, wider spreads)
Regular Hours: 9:30 AM - 4:00 PM ET (highest liquidity)
After-Hours: 4:00 PM - 8:00 PM ET (reacts to earnings releases, news)

The market is closed on weekends and major holidays (New Year's Day, MLK Day, Presidents' Day, Good Friday, Memorial Day, Juneteenth, Independence Day, Labor Day, Thanksgiving, Christmas).

Risks of Stock Investing

Market risk: The entire market can decline (recessions, crashes)
Company risk: Individual companies can fail or underperform
Volatility risk: Stock prices can swing dramatically in short periods
Inflation risk: Returns may not keep pace with inflation
Liquidity risk: Some stocks may be hard to sell quickly at fair value

Diversification through ETFs and index funds is the most effective way to reduce risk while maintaining exposure to market returns.

Stock Market: How It Works and How to Invest