What is a Stock?
A Beginner's Guide to Owning a Piece of a Company
The Simple Explanation
When you buy a stock, you're buying a tiny piece of a company. That's it. You become a part-owner.
If you buy one share of Apple, you literally own a small fraction of Apple Inc. — their buildings, their iPhone designs, their cash in the bank. You're a shareholder.
Why Do Companies Sell Stock?
Companies need money to grow. They have two main options:
- Borrow money (take out loans, issue bonds)
- Sell ownership (issue stock)
When a company "goes public" through an IPO (Initial Public Offering), they're selling pieces of their company to raise money. That money funds new products, hires employees, or expands into new markets.
How Do You Make Money?
Two ways:
1. Price Goes Up (Capital Gains) - You buy a stock at $50 - The company does well, more people want to own it - The price rises to $75 - You sell and pocket the $25 difference
2. Dividends - Some companies share their profits with shareholders - They pay you cash (usually quarterly) just for owning the stock - Example: If a stock pays $2/year in dividends and you own 100 shares, you get $200/year
Key Terms to Know
| Term | What It Means |
|---|---|
| Share | One unit of stock |
| Shareholder | Someone who owns shares |
| Ticker Symbol | The short code for a stock (AAPL = Apple, TSLA = Tesla) |
| Market Cap | Total value of all shares (share price × number of shares) |
| Volume | How many shares traded that day |
Stock Exchanges
Stocks are bought and sold on exchanges — like marketplaces for stocks:
- NYSE (New York Stock Exchange) — the big, historic one
- NASDAQ — more tech-focused
- Other exchanges exist worldwide (London, Tokyo, Hong Kong)
When the market is "open" (9:30am - 4:00pm Eastern, Monday-Friday), millions of people are buying and selling shares every second.
Why Do Stock Prices Move?
Stock prices change based on supply and demand:
- More buyers than sellers → price goes up
- More sellers than buyers → price goes down
What makes people want to buy or sell? - Company earnings reports - News (good or bad) - Economic conditions - Competitor actions - Investor emotions (fear, greed)
Your First Stock
You don't need thousands of dollars to start. Many brokers now offer: - Fractional shares — buy $10 worth of a $500 stock - No commission trading — free to buy and sell - No minimums — start with any amount
Key Takeaways
- A stock = ownership in a company
- You make money when the price goes up or through dividends
- Prices move based on supply and demand
- You can start investing with any amount
Practice: Test Your Knowledge
Question 1: If Apple has 16 billion shares outstanding and you own 100 shares, what fraction of the company do you own?
Question 2: A stock is priced at $100 and pays a $4 annual dividend. What's the dividend yield (dividend ÷ price)?
Question 3: If more people want to sell a stock than buy it, what happens to the price?
Part of the Top the Bot™ Education Series topthebot.com/learn