What is a Stock?
Ownership in a company
When you buy a stock, you are buying a small piece of ownership in a company. These pieces are called shares. If a company has 1 million shares outstanding and you own 1,000 of them, you own 0.1% of that company. As a shareholder, you get a vote on certain company decisions and may receive a portion of the profits in the form of dividends.
How stocks are traded
Stocks are bought and sold on exchanges like the New York Stock Exchange (NYSE) or Nasdaq. When you place an order through a brokerage, it gets matched with someone on the other side — either a seller if you are buying, or a buyer if you are selling. The price of a stock at any given moment is simply the highest price a buyer is willing to pay and the lowest price a seller is willing to accept.
Why prices move
Stock prices move based on supply and demand. If more people want to buy a stock than sell it, the price goes up. If more people want to sell, it goes down. What drives that demand? Company earnings, economic data, news events, investor sentiment, and broader market trends all play a role. In the short term, emotions and news can drive prices. Over the long term, a company's actual performance tends to matter most.
Risk and reward
Stocks have historically delivered higher returns than most other asset classes over the long run, but they also come with higher risk. Prices can be volatile — it is not uncommon for a stock to drop 20% or more in a year. The key is to invest money you do not need in the short term and to diversify across many companies and sectors.
Key Takeaways
- A stock represents partial ownership in a company.
- Stocks trade on exchanges, with prices set by supply and demand.
- Prices fluctuate based on earnings, news, and market sentiment.
- Stocks offer higher long-term returns but come with higher risk.
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