The stock market sounds intimidating, like some complex system only Wall Street professionals understand. In reality, it's basically a giant marketplace — like eBay, but instead of selling sneakers and video games, people are buying and selling pieces of companies.
It's Just a Marketplace
The stock market is where buyers and sellers trade stocks (pieces of companies). That's it.
Buyer thinks a stock is worth more than the current price → they buy. Seller thinks a stock is worth less → they sell. The price adjusts based on supply and demand, just like anything else you buy and sell.
The two biggest stock markets in the US are:
- NYSE (New York Stock Exchange): The oldest, located on Wall Street. Companies like Disney, Coca-Cola, Nike trade here.
- NASDAQ: More tech-focused. Apple, Google, Amazon, Tesla trade here.
You don't need to visit these places. Everything happens electronically through your brokerage app.
Market Hours and Why They Matter
The US stock market is open Monday–Friday, 9:30 AM – 4:00 PM Eastern Time. Closed on weekends and holidays.
This means stock prices only change during these hours (mostly). There's also pre-market (4 AM – 9:30 AM) and after-hours (4 PM – 8 PM) trading, but that's less liquid and more volatile.
Practice trading during market hours with our simulator to see how prices move in real-time.
What Makes the Market Go Up or Down?
Big picture, the stock market goes up over time because the economy grows — companies earn more, innovate, and expand. The S&P 500 has averaged about 10% annual returns since 1926.
But in the short term, markets are driven by:
- Earnings reports: Companies report profits quarterly. Beat expectations → stock up. Miss → stock down.
- Economic data: Employment numbers, inflation, GDP growth.
- Federal Reserve: When they raise interest rates, stocks often drop. When they cut rates, stocks often rise.
- News and sentiment: Wars, elections, pandemics, viral tweets. Emotions drive short-term prices.
The lesson? Short-term movements are unpredictable. Long-term trends are reliably upward. That's why long-term investing wins.
Bulls, Bears, and Market Crashes
You'll hear these terms a lot:
- 🐂 Bull market: Prices are rising. Optimism. Everyone's happy.
- 🐻 Bear market: Prices drop 20%+ from their peak. Pessimism. Headlines scream.
- Correction: A 10-20% drop. Happens every 1-2 years on average.
- Crash: A sudden, steep drop (like March 2020's 30% plunge in weeks).
Here's the thing: bear markets and crashes are NORMAL. They've happened dozens of times. And every single time, the market recovered and went on to new highs. If you're a teen investor, crashes are actually opportunities to buy stocks \"on sale.\" That's dollar-cost averaging in action.