Common Stock
Common Stock
Quick Definition
Common stock is the standard form of corporate ownership that the vast majority of individual investors hold when they buy "a stock." Each share of common stock represents a fractional ownership stake in the company, entitles the holder to one vote per share on major corporate matters, and provides a proportional claim on the company's earnings and assets — after all debts and preferred stockholders have been paid.
What It Means
When you buy shares of Apple, Amazon, or any publicly traded company through a brokerage account, you are almost certainly buying common stock. It is the default, most widespread class of equity ownership.
Common stockholders are the last in line when a company distributes money — creditors and bondholders are paid first, then preferred stockholders, and then common stockholders. This "residual claimant" position is what makes common stock riskier than bonds or preferred stock. But it also means common stockholders receive all of the upside when a company succeeds, which over long periods has made common stock the highest-returning major asset class in history.
Rights of Common Stockholders
Owning common stock comes with four core rights:
| Right | What It Means | Practical Example |
|---|---|---|
| Voting rights | One vote per share on major decisions | Elect board members, approve mergers |
| Dividend rights | Receive dividends if/when declared | Quarterly cash payment per share |
| Pre-emptive rights | Right to maintain ownership percentage in new share issuances | Buy new shares before public in a rights offering |
| Residual claims | Last claim on assets if company is liquidated | Receive whatever remains after all debts are paid |
Common Stock vs. Preferred Stock
These are the two main types of stock. Understanding the difference is fundamental:
| Feature | Common Stock | Preferred Stock |
|---|---|---|
| Voting rights | Yes (1 vote/share typically) | Usually no |
| Dividends | Variable — declared at board discretion | Fixed — set dividend paid first |
| Dividend priority | After preferred | Before common |
| Liquidation priority | Last (after preferred) | Before common, after creditors |
| Price appreciation potential | High | Limited |
| Downside risk | Higher | Lower |
| Who buys it | Retail investors, growth investors | Income investors, institutions |
How Common Stock Generates Returns
Common stock generates returns in two ways:
1. Capital Appreciation (Price Growth)
When a company grows its earnings, its stock price typically rises. Investors buy and sell shares on exchanges like the NYSE and Nasdaq, and prices reflect collective expectations about future earnings.
Example: You buy 10 shares of a company at $50 each ($500 total). The company doubles its earnings over five years, and the stock rises to $95 per share. Your 10 shares are now worth $950 — a $450 gain (90% return) on a $500 investment.
2. Dividends
Many established companies share profits with stockholders by paying regular dividends. Dividends are not guaranteed — the board decides each quarter whether to pay one and how much.
Example: The same stock pays a $2 annual dividend per share. On your 10 shares, you receive $20/year in passive income, regardless of whether the stock price moves.
Total Return Formula
Total Return = (Price Appreciation + Dividends Received) / Initial Investment
| Component | Amount |
|---|---|
| Purchase price (10 shares × $50) | $500 |
| Selling price (10 shares × $95) | $950 |
| Capital gain | $450 |
| Dividends over 5 years ($2 × 10 shares × 5 years) | $100 |
| Total return | $550 / $500 = 110% |
The Historical Case for Common Stock
Common stock has been the best-performing major asset class over long periods:
| Asset Class | Approximate Avg. Annual Return (1926-2024) |
|---|---|
| Large-cap US stocks (S&P 500) | ~10% nominal |
| Small-cap US stocks | ~11-12% nominal |
| Long-term government bonds | ~5-6% nominal |
| Treasury bills | ~3-4% nominal |
| Inflation (CPI) | ~3% nominal |
Over 30 years, a $10,000 investment in the S&P 500 at 10% annual return grows to approximately $174,000. The same investment in Treasury bills at 3.5% grows to approximately $28,000.
Source: Ibbotson SBBI data / Morningstar
Common Stock Risks
Higher potential reward comes with higher risk. Common stockholders absorb the full downside:
| Risk Type | Description | Example |
|---|---|---|
| Market risk | Entire market declines | 2008 crash: S&P 500 fell 57% |
| Company risk | Specific company fails | Enron, Lehman Brothers went to zero |
| Liquidity risk | Cannot sell shares quickly at fair price | Small-cap stocks with low volume |
| Dilution risk | Company issues more shares, reducing your ownership % | New share issuance reduces EPS |
| Dividend risk | Company cuts or eliminates dividend | GE cut dividend to $0.01 in 2018 |
| Volatility | Prices fluctuate significantly short-term | 20-40% single-year swings are normal |
How Common Stock Is Bought and Sold
Primary market: Company issues new shares through an IPO (Initial Public Offering) or secondary offering, raising fresh capital.
Secondary market: After issuance, shares trade between investors on exchanges (NYSE, Nasdaq) or over-the-counter. The company receives no money from secondary market trades.
How to buy:
- Open a brokerage account (Fidelity, Schwab, Vanguard, Robinhood, etc.)
- Fund the account
- Search for the stock by ticker symbol (e.g., AAPL for Apple)
- Place a market or limit order
- Settlement occurs in 1 business day (T+1 as of 2024)
Common Stock Metrics Investors Track
| Metric | Formula | What It Tells You |
|---|---|---|
| P/E Ratio | Price / Earnings per share | How much you pay per dollar of earnings |
| EPS | Net income / Shares outstanding | Earnings attributable to each share |
| Dividend yield | Annual dividend / Stock price | Cash return from dividends alone |
| Market cap | Stock price × Shares outstanding | Total company value at current price |
| Book value per share | Total equity / Shares outstanding | Accounting value per share |
Common Stock in a Portfolio Context
Most diversified long-term portfolios hold the majority of their equity allocation in common stock, typically through index funds that own hundreds or thousands of stocks simultaneously.
Example portfolio allocations by age:
| Investor Age | Common Stock % | Bonds/Fixed Income % |
|---|---|---|
| 25 years old | 90% | 10% |
| 40 years old | 80% | 20% |
| 55 years old | 65% | 35% |
| 65 years old | 50-60% | 40-50% |
The classic rule of thumb: subtract your age from 110 (or 120 for more aggressive) to get your stock allocation percentage.
Key Points to Remember
- Common stock is the standard form of ownership in publicly traded companies
- Common stockholders have voting rights (typically 1 vote per share) and a claim on profits
- Returns come from capital appreciation (price increase) and dividends
- Common stockholders are last in line if a company goes bankrupt — after creditors and preferred stockholders
- Historically, common stock has been the highest-returning major asset class over long periods (~10%/year for S&P 500)
- Most individual investors hold common stock through index funds or ETFs rather than picking individual stocks
Frequently Asked Questions
Q: What is the difference between common stock and a share? A: They are the same thing. A share is one unit of common stock. When you own 100 shares, you own 100 units of the company's common stock. "Stock" and "shares" are used interchangeably in everyday language.
Q: Do I need a lot of money to invest in common stock? A: No. Most brokerages now offer fractional shares, allowing you to invest as little as $1 in a single stock. You could buy $10 worth of Amazon stock without buying a full share. Regular contributions of small amounts — a strategy called dollar-cost averaging — is one of the most effective long-term investing approaches.
Q: Is it better to buy individual common stocks or an index fund? A: For most investors, research strongly favors low-cost index funds. Studies show that over any 15-year period, the majority of actively managed funds and most individual stock pickers underperform a simple S&P 500 index fund. Individual stocks concentrate risk in single companies; index funds spread risk across hundreds or thousands. Warren Buffett himself recommends low-cost S&P 500 index funds for most non-professional investors.
Q: Can I lose all my money in common stock? A: Yes — if a company goes bankrupt and its stock becomes worthless, you lose the entire amount invested in that stock. This is why diversification matters. If you own 500 companies via an index fund, one company going bankrupt has minimal impact. If you put 50% of your savings into a single stock and that company fails, the loss is severe.
Related Terms
Stock
A stock is a share of ownership in a company, entitling holders to a proportional claim on the company's assets, earnings, and voting rights in exchange for capital provided to the business.
Preferred Stock
Preferred stock is a hybrid security that combines features of stocks and bonds — offering fixed dividends paid before common stockholders but usually without voting rights, sitting in a middle tier between bondholders and common shareholders.
Asset Allocation
Asset allocation is the strategy of dividing a portfolio among different asset classes like stocks, bonds, and cash based on your goals, time horizon, and risk tolerance to optimize the risk-return trade-off.
Capital Gains
Capital gains are the profits earned when you sell an asset for more than you paid for it, taxed at either short-term rates (ordinary income) or preferential long-term rates depending on how long you held the asset.
Class A Shares
Class A shares are a category of stock or mutual fund shares that typically carry more voting rights, lower expense ratios, or front-end sales loads compared to other share classes — the specific benefits depend on whether you are talking about stocks or funds.
Secondary Offering
A secondary offering is the sale of new or existing shares by a public company or its major shareholders after the initial public offering — either raising fresh capital for the company or allowing insiders to cash out, with different implications for existing shareholders depending on the type.
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