Stocks Explained

What Is a Stock?

A stock represents an ownership interest in a company. When you buy shares of a publicly traded business, you become a shareholder and own a very small portion of that company.

Companies issue shares to raise capital, while investors buy those shares because they believe the business may become more valuable or generate income over time.

How Do Stocks Work?

Once a company is publicly traded, its shares can be bought and sold on a stock exchange.

The price of a stock changes continuously during market hours as buyers and sellers interact. Investors may be willing to pay more when they expect stronger future performance, while concerns about a company or the wider economy can push prices lower.

Owning a stock therefore means accepting that the value of your investment can change significantly over time.

Why Do Companies Sell Stock?

Companies can sell shares to raise money for growth, research, acquisitions, expansion or other business activities.

A company may initially sell shares to the public through an initial public offering, commonly known as an IPO.

After shares are publicly traded, investors can buy and sell them from one another on the market. The company does not receive money every time its shares are traded between investors.

Why Do Investors Buy Stocks?

Investors typically buy stocks because they believe the company can increase in value, generate profits or return money to shareholders.

If the stock price rises after an investor buys shares, selling at a higher price can produce a capital gain.

Some companies also pay dividends, allowing shareholders to receive part of the company's profits or available cash distributions.

What Makes a Stock Price Move?

Stock prices can move for many reasons. Company earnings, revenue growth, guidance, new products, management decisions and competitive conditions can all influence investor expectations.

Broader factors also matter. Interest rates, inflation, economic growth, geopolitical events and overall market sentiment can affect the prices of many stocks at the same time.

Because markets constantly react to new information, stock prices can move sharply even when a company's long-term business has not changed dramatically.

Market Capitalization

Market capitalization, often called market cap, is the total market value of a company's outstanding shares.

It is calculated by multiplying the company's share price by the number of shares outstanding.

Market cap is commonly used to describe companies as large-cap, mid-cap or small-cap businesses. These categories can behave differently and may carry different levels of risk and growth potential.

Dividends and Capital Gains

Investors can potentially earn returns from stocks in two main ways: capital appreciation and income.

Capital appreciation occurs when the value of shares increases. Dividend income comes from companies distributing part of their available profits or cash to shareholders.

Not every company pays dividends. Younger or fast-growing companies may choose to reinvest available cash into expanding the business instead.

Growth Stocks vs Value Stocks

Growth stocks are generally associated with companies that investors expect to grow faster than the broader market.

Value stocks are generally associated with companies whose shares appear relatively inexpensive compared with certain measures of their business performance or assets.

These categories are not absolute, and a company can move between different classifications as its business and valuation change.

The Risks of Individual Stocks

Buying an individual stock creates company-specific risk. A business can experience falling profits, management problems, stronger competition, regulatory changes or other events that negatively affect its value.

Even a strong company can experience significant price declines during periods of market stress.

This is one reason investors often consider diversification instead of putting a large portion of their portfolio into a single company.

Stocks and Long-Term Investing

Stocks can play an important role in long-term portfolios because businesses can grow their revenues, profits and economic value over time.

However, long-term investing does not mean ignoring risk. Investors still need to consider valuation, diversification, time horizon and their ability to tolerate periods of significant volatility.

Understanding how individual stocks work is an important foundation before moving into more advanced topics such as valuation, portfolio construction or trading strategies.