In 1602, the Dutch East India Company did something no business had done before: it invited ordinary citizens to buy ownership shares in a commercial enterprise. A total of 1,143 investors contributed 3,674,945 guilders during that first offering, and the Amsterdam Stock Exchange opened for business. Four centuries later, that same basic idea powers a global market worth over $150 trillion.
A stock is a unit of ownership in a company. Buy one share of Apple, and you legally own a fraction of its factories, patents, cash reserves, and future profits. Apple has roughly 15 billion shares outstanding, so a single share represents a tiny sliver of the company. That sounds microscopic, but it still entitles you to a proportional vote on corporate decisions and a proportional cut of any profits the company distributes.
How the first stock market started
The Dutch East India Company (known by its Dutch abbreviation, VOC) needed enormous capital to fund spice trade expeditions to Southeast Asia. Rather than borrowing from wealthy lenders, the company published a charter on March 20, 1602, stating that “all the residents of these lands may buy shares in this Company.” There was no minimum or maximum investment. Within weeks, buyers began trading their shares with each other, and by the 1680s, Amsterdam traders were using forwards, futures, options, and short selling. Those techniques are indistinguishable from what Wall Street uses today.
The concept crossed the Atlantic in 1792, when 24 stockbrokers signed the Buttonwood Agreement under a buttonwood tree on Wall Street, forming what eventually became the New York Stock Exchange. Today the NYSE alone lists over 1,580 companies with a combined market capitalization exceeding $68 trillion.
What you actually own
When a company “goes public,” it divides itself into a fixed number of shares and sells them to investors through an initial public offering (IPO). Each share is a legal certificate of partial ownership.
That ownership comes with two concrete rights. First, shareholders vote on major corporate decisions: approving board members, authorizing mergers, and setting executive compensation. Second, shareholders receive a proportional cut of any profits the company chooses to distribute (called dividends).
What shareholders do not get is liability. If the company goes bankrupt, the most you can lose is the money you paid for the shares. Creditors cannot come after your personal assets. This concept, called limited liability, is one of the reasons stock markets grew so quickly. It removed the risk that would have stopped most ordinary people from investing.
Why companies sell pieces of themselves
The short answer: capital without debt. When Netflix needed billions to fund original programming, it could have borrowed the money and paid interest on it for decades. Instead, it sold shares to the public, raising cash it never has to repay. The trade-off is that existing owners, including the founders, give up a percentage of future profits and control.
Companies typically go public when they need more capital than bank loans or venture capital can provide. The IPO process involves regulatory filings with the Securities and Exchange Commission, hiring underwriting banks to set the initial share price, and then listing on an exchange where anyone with a brokerage account can buy in.
What moves a stock price
Stock prices change for two reasons: the fundamentals of the business and the sentiment of the crowd.
Fundamentals are measurable. Revenue, profit margins, cash flow, debt levels, and competitive position all feed into what analysts call a company’s intrinsic value. When Apple reports quarterly earnings above expectations, the price typically rises because the company proved it is worth more than investors thought.
Sentiment is less rational. Fear, hype, social media momentum, and macroeconomic headlines (including inflation reports and interest rate decisions) can push prices far from intrinsic value for months or years. The dot-com bubble of 1999 to 2000 inflated stock prices to levels that company earnings could never justify. The 2008 financial crisis pushed prices below what the underlying businesses were actually worth. The meme stock frenzy of 2021 showed that social media alone could send a struggling retailer’s share price up 1,500% in two weeks.
In the short run, the market is a voting machine. In the long run, it is a weighing machine. That line is attributed to Benjamin Graham, Warren Buffett’s mentor, and decades of data back it up: across every rolling 20-year period since 1926, the S&P 500 has delivered positive total returns.
The dividend bonus
Some companies share profits directly with shareholders in the form of dividends, cash payments made quarterly or annually per share owned.
Coca-Cola has paid a dividend every quarter since 1920 and increased it for 62 consecutive years. Johnson & Johnson, Procter & Gamble, and 3M have similar streaks spanning decades. These companies belong to an informal category called “Dividend Aristocrats,” a title reserved for S&P 500 members that have raised their dividend annually for at least 25 consecutive years.
Not every stock pays dividends. Fast-growing companies like Amazon and Tesla reinvest nearly all their profits into expansion rather than distributing them. The trade-off is straightforward: dividend stocks provide regular income, while growth stocks bet on a higher share price in the future.
The current dividend yield of the S&P 500 sits at roughly 1.05% as of May 2026, near its all-time low. Historically, the median yield has been closer to 2.9%. The decline reflects the growing dominance of technology companies that prefer reinvestment over distribution.
Market indices: the scoreboards everyone watches
When news anchors say “the market was up today,” they are usually referencing one of three indices.
The S&P 500 tracks 500 of the largest U.S. companies by market capitalization. It covers roughly 80% of total U.S. stock market value and is widely considered the single best gauge of overall market performance.
The Dow Jones Industrial Average tracks just 30 large companies, weighted by share price rather than market cap. Created in 1896, it is the oldest major U.S. index and the most quoted in headlines, but its narrow scope makes it less representative than the S&P 500.
The Nasdaq Composite leans heavily toward technology. It includes over 3,000 listings and is dominated by Apple, Microsoft, Nvidia, Amazon, and Alphabet.
You cannot buy an index directly, but you can buy an index fund or ETF that mirrors one. This is the approach Warren Buffett has publicly recommended for most individual investors.
A century of returns
Over the last 100 years, the S&P 500 has returned an average of 10.4% per year, including dividends. That figure encompasses the Great Depression, World War II, the 1970s stagflation, the dot-com bust, the 2008 financial crisis, and the 2020 pandemic crash. About two out of every three calendar years have been positive.
At 10.4% annually, money doubles roughly every 6.9 years (using the Rule of 72). That is compound growth in action: gains build on previous gains, and time becomes the most powerful variable in the equation.
Not every year is positive. The S&P 500 has declined in roughly one of every three calendar years. But over any rolling 20-year window since 1926, stocks have never delivered a negative total return. Patience has been the only consistent requirement.
As of 2025, 62% of American adults own stock in some form, whether through brokerage accounts, 401(k) plans, or IRAs. That figure has held steady since 2024 and is up from the low point of 52% in 2013. Ownership rates climb sharply with income: 87% of households earning $100,000 or more hold stocks, compared with 28% of those earning under $50,000.
Stocks versus bonds: what the numbers say
Bonds are loans. When you buy a U.S. Treasury bond, you are lending money to the federal government in exchange for fixed interest payments and the return of your principal at maturity. The risk is lower, and so is the reward.
From 1928 through 2024, the S&P 500 returned roughly 11.8% per year on average. Ten-year U.S. Treasury bonds returned about 4.8% over the same period. That gap compounds dramatically: $100 invested in stocks in 1928 would be worth over $980,000 today. The same $100 in bonds would be worth roughly $7,200.
Over any 10-year period, stocks have outperformed bonds 89% of the time. Over 15-year and 20-year horizons, stocks have beaten bonds in every single instance. The longer your time horizon, the stronger the case for equities.
Bonds still serve a purpose. They reduce portfolio volatility and provide predictable income, which matters when you need the money within the next few years. Most financial planners recommend a mix of both, with the stock allocation higher for younger investors who have decades before they need the funds.
Buying your first share
Buying a stock in 2026 takes less time than ordering lunch. Online brokers like Fidelity, Charles Schwab, and Vanguard offer zero-commission stock trades and fractional share purchasing. That means you can invest $5 in Berkshire Hathaway (which trades above $700,000 per Class A share) and own a corresponding fraction.
The basic steps: open a brokerage account, deposit money, search for the company by name or ticker symbol, and place an order. Most platforms also offer access to index funds and ETFs, which bundle hundreds or thousands of stocks into a single purchase.
When you sell a stock for more than you paid, the profit is a capital gain, and taxes apply. How much you owe depends on how long you held the share: gains on positions held longer than one year are taxed at lower rates than short-term gains.
The SEC’s Investor.gov provides free educational resources for beginners, including guides on account types, fees, and how to evaluate a company before you buy.