What Is the Stock Market and How Does It Work?

The stock market is a marketplace where investors buy and sell shares of publicly traded companies. It allows businesses to raise money for growth while giving investors an opportunity to participate in their financial success.

Companies such as Apple, Microsoft, Amazon and Nvidia have shares that trade on stock exchanges. When investors purchase these shares, they acquire ownership interests in the respective companies.

The stock market plays an important role in the global economy by connecting businesses that need capital with investors who want to invest their money.

1. What Is a Stock?

A stock represents a unit of ownership in a company. When you purchase a share of a publicly traded company, you become a shareholder.

For example, imagine a company has issued 1 million shares. If you own 1,000 shares, you own 0.1% of its outstanding shares, assuming the shares have equal ownership rights.

As a shareholder, you may benefit if the company grows in value. Depending on the type of shares you own, you may also receive dividends or voting rights.

However, stock ownership does not guarantee profits. If the company's business performance deteriorates or investors become less optimistic about its future, its share price may decline.

2. Why Does the Stock Market Exist?

The stock market serves two major purposes: helping companies raise capital and providing investors with a place to trade ownership interests.

For companies: Businesses can sell shares to investors to raise money for expansion, research, hiring, debt reduction or other corporate purposes.

For investors: Individuals and institutions can buy shares to participate in potential business growth and receive dividends when companies distribute profits.

For example, a technology company might issue shares to finance the development of new products. Investors who purchase those shares provide capital to the business and receive ownership interests in return.

After the shares begin trading publicly, investors can generally buy and sell them among themselves through the stock market.

3. What Is a Stock Exchange?

A stock exchange is an organized marketplace where eligible securities are listed and traded under established rules.

Examples include:

New York Stock Exchange (NYSE): One of the major stock exchanges in the United States.
Nasdaq: A major US exchange known for listing many technology companies.
London Stock Exchange (LSE): A major financial market in the United Kingdom.
National Stock Exchange of India (NSE): One of India's principal stock exchanges.
Nepal Stock Exchange (NEPSE): Nepal's main stock exchange.

Companies generally must meet listing requirements before their shares can trade on an exchange.

Stock exchanges provide trading infrastructure, market rules and mechanisms that help buyers and sellers transact. In modern markets, much of the trading takes place electronically.

4. How Does the Stock Market Work?

The stock market operates through a process involving companies, investors, brokers, exchanges and market participants.

Step 1: A company issues shares

A private company may decide to raise money by offering shares to the public through an Initial Public Offering (IPO).

Suppose a company wants to raise $100 million to expand its operations. It could issue 10 million new shares at $10 each.

If investors purchase all those shares, the company raises $100 million before applicable costs.

An IPO can turn a private company into a publicly traded company, although some public offerings involve existing shareholders selling their shares rather than the company issuing new ones.

Step 2: Investors open brokerage accounts

Investors typically use a licensed or authorized broker to access a stock exchange.

A brokerage account allows investors to place orders to buy and sell securities. Depending on the market and account, investors may also access research tools, price charts, company financial information and portfolio statements.

The broker routes orders to the relevant exchange or another permitted trading venue.

Step 3: Buyers and sellers place orders

Investors can submit orders specifying what they want to buy or sell and at what price.

A market order generally seeks immediate execution at the best available prices.

A limit order specifies the highest price a buyer is willing to pay or the lowest price a seller is willing to accept.

For example, suppose a stock is trading around $50. A buyer places a limit order to purchase shares at $48. The order will execute only if suitable sellers are available at $48 or less, subject to market rules and order priority.

Step 4: Orders are matched

The exchange's trading system matches compatible buy and sell orders according to its rules.

If a buyer is willing to pay the price a seller is asking, a trade can take place.

If the orders do not match, they may remain in the order book until they execute, expire or are canceled.

This process helps determine the market price of a stock.

Step 5: Shares and money are settled

After a trade executes, the transaction proceeds through clearing and settlement processes.

The buyer pays for the shares, and ownership is transferred according to the market's settlement rules. The broker and relevant financial institutions help process the transaction.

Settlement timing varies by market and security.

5. How Are Stock Prices Determined?

Stock prices are influenced by supply and demand, but those forces are shaped by information and expectations about a company's future.

When more investors are willing to buy at available prices than there are sellers willing to sell at those prices, the share price may rise. When selling pressure increases, the price may fall.

Several factors can influence these decisions.

Company earnings: Stronger-than-expected earnings may increase investor confidence, while disappointing results can have the opposite effect.

Revenue growth: Investors often examine whether a company's sales are growing and whether that growth can continue.

Economic conditions: Interest rates, inflation, employment and economic growth can influence company profits and stock valuations.

Industry trends: New technology, competition, regulation and changes in customer demand can affect entire industries.

Investor expectations: Stock prices reflect what investors expect to happen, not just what has already happened.

For example, a company may report higher profits but see its share price fall if investors expected an even larger increase. Similarly, a company with weak current profits might experience a price rise if investors expect a strong recovery.

6. How Do Investors Make Money in the Stock Market?

Investors generally seek returns through capital appreciation and dividends.

Capital appreciation

Capital appreciation occurs when the market price of a share rises above the investor's purchase price.

Suppose you purchase 100 shares at $20 each.

Initial investment = 100 × $20 = $2,000.

If the share price later increases to $28, the shares are worth $2,800.

Unrealized gain = $2,800 − $2,000 = $800.

The gain becomes realized when you sell the shares at a price that produces that profit, before applicable fees and taxes.

If the price instead falls to $15, your shares would be worth $1,500, representing an unrealized loss of $500.

Dividends

Some companies distribute part of their profits or accumulated funds to shareholders through dividends.

For example, suppose a company declares an annual dividend of $2 per share. An investor holding 100 eligible shares would receive $200 over the year if the dividend is paid as declared.

However, dividends are not guaranteed. Companies may reduce, suspend or eliminate them, and the stock price can decline by more than the dividend received.

Some successful companies reinvest most of their earnings instead of paying regular dividends.

7. What Is the Difference Between Investing and Trading?

Investing and trading both involve buying and selling financial assets, but they often differ in their objectives and time horizons.

Investing generally involves purchasing assets with the intention of holding them for an extended period. Investors often focus on company fundamentals, long-term growth, earnings, dividends and valuation.

Trading generally involves buying and selling assets more frequently to take advantage of price movements. Traders may focus on price trends, trading volume, market news and technical indicators.

Neither approach guarantees a profit. Frequent trading can involve substantial costs and risks, while long-term investors must still evaluate company performance, valuation and market uncertainty.

8. What Are Bull and Bear Markets?

Investors use the terms bull market and bear market to describe broad market conditions.

Bull market: A period characterized by a sustained upward trend in market prices and generally positive investor sentiment.

Bear market: A period characterized by a substantial and sustained decline in market prices, often accompanied by pessimism about economic or corporate prospects.

For example, during a bull market, investors may become more optimistic about company earnings and economic growth. During a bear market, concerns about recession, inflation or declining profits may contribute to widespread selling.

These labels describe broad trends, not guarantees about what prices will do next.

9. What Are Stock Market Indexes?

A stock market index tracks the performance of a selected group of securities and provides a way to measure part of the market.

Examples include:

S&P 500: Tracks approximately 500 leading US companies.
Nasdaq-100: Tracks 100 of the largest non-financial companies listed on Nasdaq, subject to the index's rules.
Dow Jones Industrial Average: Tracks 30 prominent US companies.
Nifty 50: Tracks 50 major companies listed on India's National Stock Exchange.
Nikkei 225: Tracks 225 selected Japanese stocks.
NEPSE Index: Tracks the performance of stocks listed on Nepal's main stock exchange.

Indexes use specific methodologies, such as market-capitalization weighting or price weighting.

Investors often use indexes to understand market performance or compare their portfolios with a benchmark. Some investment funds also seek to track these indexes.

10. What Is Market Capitalization?

Market capitalization, or market cap, measures the total market value of a company's outstanding shares.

The formula is:

Market Capitalization = Share Price × Outstanding Shares

For example, imagine a company has 500 million outstanding shares and each share trades at $40.

Market capitalization = 500 million × $40.

Market capitalization = $20 billion.

This means the market values the company's outstanding shares at $20 billion.

Market capitalization is not the same as revenue, profit, cash held by the company or the amount it would necessarily cost to purchase the entire business.

11. What Are the Main Risks of the Stock Market?

Stock investing involves several types of risk.

Market risk: Broad economic or financial conditions can cause stock prices to fall.

Company risk: Poor management, declining sales, debt or competitive pressures can reduce a company's value.

Valuation risk: Even a good company can be a disappointing investment if its shares are purchased at an excessively high price.

Liquidity risk: Some shares trade infrequently, making it difficult to buy or sell quickly at a desired price.

Emotional decision-making: Fear, excitement and following market rumors can lead investors to make poorly considered decisions.

Investors can manage some risks through research, diversification, suitable time horizons and avoiding investments they do not understand. However, these measures cannot eliminate the possibility of losses.

12. How Can Beginners Start Learning About the Stock Market?

A beginner can build a foundation by following a few practical steps.

Learn basic financial concepts, including shares, dividends, market capitalization, EPS and the P/E ratio.
Understand how stock exchanges, brokers, order types and settlement work in the market you want to access.
Study company financial statements, business models, debt and cash flow.
Learn how valuation relates to the market price of a share.
Understand the risks before investing real money, and be cautious about borrowing to invest or relying on promises of guaranteed returns.
Consider diversified investments and compare their costs, risks and suitability for your goals.

The rules for opening accounts, taxes, eligible securities and investor protections vary between countries, so investors should understand their local regulations.

Conclusion

The stock market connects companies seeking capital with investors who want to own shares in businesses. Companies can raise money by issuing shares, while investors can trade those shares through brokers and exchanges.

Stock prices change as investors respond to company performance, economic conditions, news, supply and demand, and expectations about the future.

Understanding how the stock market works is the first step toward evaluating investments responsibly. Learning about company fundamentals, valuation, diversification and risk can help investors make more informed decisions, although no investment approach can guarantee profits.

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