Start here · Buy and hold · Stock Market Classroom
A stock is a small piece of a company. When you own it and give it time, it can pay you in two ways. The share price can go up, and the company may pay you a cash dividend. If you use those dividends to buy more shares, the new shares pay dividends too. That loop is called DRIP, and it is how compounding works.
Welcome to Stock Market Classroom. This page is for you if you have never bought a share, and also if you already own stocks but check the price every morning. We stick to the basics: well-known companies, a fund that holds hundreds of them, the free money in a 401(k) match, and the habit of adding a little each month.
Options, swing trades, and covered-call funds come later. You do not need them to get started. Nothing here is advice to buy or sell any stock or fund.
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What a Stock Is
The price you see on your screen changes with the mood of the day. The share itself is a piece of a real business.
Buy and hold is simple. You buy solid, well-known companies, or a fund that owns hundreds of them, and then you leave them alone. Most of the growth happens while you are not watching.
How Stocks Grew Over 10 Years
Here is what $10,000 grew into from the October 2016 month-end close to the October 9, 2026 close. These are total returns, which means dividends were reinvested. Use the buttons to change the starting pile.
Starting pile
| What you held | It became | Times | Pace |
|---|---|---|---|
| Cash in a drawer | $1,000$5,000$10,000$25,000 | 1.00x | 0% |
| Coca-Cola | $2,831$14,156$28,313$70,782 | 2.83x | +11.0% a year |
| Johnson & Johnson | $2,958$14,792$29,583$73,958 | 2.96x | +11.5% a year |
| S&P 500 fund | $4,289$21,446$42,892$107,230 | 4.29x | +15.7% a year |
| Amazon | $6,645$33,226$66,453$166,132 | 6.65x | +20.9% a year |
| Microsoft | $10,056$50,282$100,564$251,410 | 10.1x | +26.0% a year |
| Apple | $12,965$64,826$129,652$324,130 | 13.0x | +29.2% a year |
| Nvidia | $131,336$656,678$1,313,356$3,283,390 | 131x | +62.9% a year |
Bars, without Nvidia
Nvidia, not on the bars: $131,336$656,678$1,313,356$3,283,390. Drawn to scale, it would squash the others. It is left off on purpose.
A bigger or smaller starting pile changes the dollar amounts, but not the yearly pace. A different ten years could change the pace.
What Each One Paid in Dividends
- Cash: no dividend. These dollars buy less than they did in 2016.
- Coca-Cola: $2.12 a year per share. Yield about 2.41%. Raised 64 years.
- Johnson & Johnson: about $5.36 a year. Yield about 2%. Raised 64 years.
- S&P 500 fund: about 0.93% now, from the companies inside the fund.
- Amazon: no dividend. All of the gain came from the share price.
- Microsoft: about $3.92 a year. Yield about 0.73%.
- Apple: $1.06 a year. Yield about 0.31%. Most of the gain came from the price.
- Nvidia: about $0.52 a year. Yield about 0.23%. This is not a normal result.
Apple, Nvidia, and Amazon all split their shares during these years. A split lowers the price per share and gives you more shares, so the value of what you own stays the same that day. In October 2016 the screen price was about $114 for Apple, about $71 for Nvidia, and about $790 for Amazon. The numbers above already account for those splits.
Same $10,000, Three Different Results
- Cash stayed at $10,000. It paid no dividend, and after inflation it buys less than it did in 2016.
- Coca-Cola grew to $28,313. On price alone it would have been $20,767. Reinvesting the dividends added about $7,547.
- The S&P 500 fund grew to $42,892, and you did not have to pick a winner. Apple grew to $129,652 and Nvidia to $1,313,356, and the fund already owned a piece of Nvidia.
Even after inflation, the S&P 500 result was still about 3.05 times your money in buying power (Total Real Returns, October 7, 2016 to October 9, 2026). Cash did not get that boost.
How DRIP Works
DRIP stands for dividend reinvestment, and it is just a setting in your account. Each dividend automatically buys more shares, often a fraction of a share. Next quarter you own a little more, so your next dividend is a little bigger. On the $10,000 Coca-Cola example, turning DRIP on was worth about $7,547. The rising price did most of the work. The reinvested dividends added extra, and because the price went up, those extra shares were worth more later.
Coca-Cola, $10,000 start. Price alone vs. dividends reinvested.
Watch the Share Count Grow
To make the share count easy to follow, this example keeps the price frozen at $40. You start with 250 shares. The dividend starts at $1 a share and goes up six cents each year. This is a teaching example, not a real quote. The Coca-Cola numbers above are the real ten years. Change the numbers in the calculator to try your own.
Here is the same example at 10, 20, and 30 years:
| Year | DRIP shares | DRIP pile | Checks as cash | DRIP ahead |
|---|---|---|---|---|
| 0 | 250 | $10,000 | $10,000 | $0 |
| 10 | 342 | $13,668 | $13,175 | $493 |
| 20 | 540 | $21,582 | $17,850 | $3,732 |
| 30 | 982 | $39,290 | $24,025 | $15,265 |
After 10 years you hold about 342 shares instead of 250, and you are about $493 ahead. That gap is small because the price never moved. After 30 years the same loop puts you about $15,265 ahead, near $39,290 versus $24,025. When the real price rises, those extra shares rise with it.
You can turn DRIP off later when you want the cash to spend. Keep in mind that companies can cut their dividends, and DRIP does not protect you from that.
More shares. Same company. No extra decisions.
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Why Diversify
In 2022 the market fell hard. Coca-Cola and Johnson & Johnson went up. Amazon and Nvidia lost about half their value, and Apple and Microsoft fell hard too. If you owned only a stock that got cut in half, it felt like the end. If you also owned the fund or a steadier company, part of your money was not falling the same way.
| What you held | 2022 | The decade |
|---|---|---|
| S&P 500 | -18.2% | +329% |
| Coca-Cola | +10.6% | +183% |
| Johnson & Johnson | +6.0% | +196% |
| Apple | -26.4% | +1,197% |
| Microsoft | -28.0% | +906% |
| Amazon | -49.6% | +565% |
| Nvidia | -50.3% | +13,034% |
Several of the stocks that fell the most in 2022 ended up among the best over the full ten years, for people who held on. Selling made the loss permanent. Holding is why the decade still paid off.
You do not need to own twenty different things. One broad stock fund is already diversified. You can add a few well-known stocks next to it. Just do not put everything in a single stock, even a famous one. Nvidia growing to 131 times your money shows why a fund owns many companies. It is not a treasure map. The exact day you bought would change that dollar result.
Get Your 401(k) Match
Before you go looking for stocks, check your job. If your employer adds money when you put money into your 401(k), that is called a match. If you skip it, you are turning down a raise. Getting it does not depend on guessing the market. It depends on filling out a form.
Classroom example
Salary: $50,000. Dollar-for-dollar match up to 6% of pay. You put in $3,000. The employer puts in $3,000. You have $6,000 working, and half of it showed up because you participated. That is a 100% bonus on your slice, on day one.
Some plans match 50 cents on the dollar. With the same salary and 6% cap, you still put in $3,000 and the company adds $1,500. A 50% bonus on day one is better than any hot tip will give you. Every plan is different, so read yours. Put in at least enough to get the full match before you think about anything fancier. Try your own numbers below.
After you get the full match, many people open a Roth IRA next, then a regular brokerage account if they still have money to invest. Inside the 401(k), a broad stock fund with dividends reinvested, left alone, is a complete way to start. Learn more in the 401(k) playbook.
Invest a Little Each Month
You do not need a big lump sum. Someone who put $100 a month into an S&P 500 fund from October 2016 through September 2026 put in $12,000. With dividends reinvested, it grew to about $27,488. (Source: YX Insights, through September 24, 2026.)
That is $12,000 in, about $100 a month, with no stock picking, and it more than doubled during a strong ten years. The next ten years may not go the same way.
| If you add | You put in | It became |
|---|---|---|
| $25 a week (about $108 a month) | about $13,000 | about $29,762 |
| $50 a month | about $6,000 | about $13,744 |
| $100 a month | $12,000 | about $27,488 |
The smaller and larger rows are proportions of the same $100-a-month study, not a separate backtest. That decade, not a forecast.
Investing a set amount on a schedule is called dollar-cost averaging. Some months shares cost less and some months they cost more, and you stop trying to guess the perfect day. Pick an amount small enough that a bad month will not make you quit, and make it automatic so you do not have to decide again every payday.
Set up the automatic buy
Open a brokerage account, pick a broad fund or a short list of businesses you understand, set a recurring buy, and turn dividend reinvestment on if your broker offers it. Start small. New to all of this? Here is how to open a Robinhood account and get a free stock.
What to Do This Week
- If you have a 401(k), find out what the match is. Raise your contribution until you get every dollar they offer.
- Pick a broad stock fund, or a short list of companies you understand. Plan to hold for years.
- Turn on dividend reinvestment while you are building.
- Set up an automatic weekly or monthly buy. Start smaller than you think you need to.
- When the market drops, remember 2022. The people who held on are the ones the decade paid.
Later lessons cover dividends in more depth, covered-call funds, and options. They build on this lesson; they do not replace it. Browse the stock market lessons when you are ready. The free Sunday Note is one short lesson a week.
Key Terms
| Word | Plain meaning |
|---|---|
| Share | A tiny slice of a company. |
| Dividend | Cash the company pays you, usually every three months. It can be raised or cut. |
| DRIP | Those checks buy more shares. The new shares pay you too. That is compounding. |
| Total return | Price change plus reinvested dividends. That is the number that matters. |
| Diversify | Own many businesses, or a fund that owns them, so one bad story is not the pile. |
| 401(k) match | Money your employer adds when you contribute. Unclaimed, it is a raise you refused. |
| Dollar-cost averaging | Buying on a schedule, a little at a time, instead of hunting for the perfect day. |
| Split | The price is cut and you get more shares. Your money stays the same that day. |
Sources
Share prices are Yahoo Finance: the October 2016 month-end close, and the October 9, 2026 close. Dividends reinvested uses the split- and dividend-adjusted prices over that window. Dividend amounts are what the shares were paying in early October 2026. A separate 10-year check (Total Real Returns, through October 9, 2026) lands in the same neighborhood. Nvidia moves so fast that the exact day you bought changes the dollar result. Coca-Cola closed near $88 and Apple near $337 on October 9, 2026.
The monthly example is YX Insights through September 24, 2026. The frozen-price DRIP table is a classroom sketch, not a historical quote. The 401(k) math is a formula. Your plan document is the one that counts.
Stocks fall. Dividends get cut. You can lose money. The last ten years were a strong decade, and the next ten do not have to look like them. This is a classroom lesson, not a buy or sell tip.
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