Stocks

When people talk about "the stock market," they're really talking about a system that has produced about 7% real annualized returns over more than 100 years — a wealth-building engine unlike anything else in finance. But the path is brutal: drawdowns of 30-55% happen multiple times per generation, and most retail investors destroy their own returns by selling near the bottoms. This guide explains what stocks actually are, how they generate returns, the role they play in a portfolio, and how to participate in them without becoming a statistic.

What a share of stock actually represents

When you buy a share of stock, you're buying a fractional ownership interest in a company. That ownership entitles you to a proportional claim on the company's future earnings and assets. If the company earns more, your slice grows in value. If the company is liquidated, common shareholders receive whatever remains after creditors and preferred shareholders are paid — which is often nothing in a bankruptcy.

This is the essential trade-off: you participate fully in the upside, but you sit at the back of the line for downside. Decades of data show that, for the market as a whole, the upside has dramatically outweighed that risk. The S&P 500 has returned about 10% annually nominally (7% real, after inflation) over 100+ years, including dividends. No other public asset class comes close to that long-run track record.

How stocks actually generate returns

Long-term stock returns come from three distinct sources, and understanding which one is dominant in any given period explains a lot about market behavior:

• Earnings growth. Companies retain a portion of profits and reinvest in their business — new factories, new products, more sales. Over time, profitable reinvestment grows the underlying earnings base. This is the engine that compounds wealth.
• Dividends. Companies distribute a portion of profits directly to shareholders, typically quarterly. Historically, reinvested dividends have accounted for roughly 30-40% of the S&P 500's total return.
• Multiple expansion (or contraction). The price the market is willing to pay per dollar of earnings — the P/E ratio — fluctuates with sentiment, interest rates, and growth expectations. This is the volatile, unpredictable component.

In any given decade, multiple expansion can dominate (1990s, 2010s) or punish (1970s, 2000s). But over 30-year periods, earnings growth and dividends do the heavy lifting. This is why long-horizon investors who hold through cycles end up far ahead of traders who try to time short-term sentiment.

Common stock vs. preferred stock

Two main classes of stock exist, and most investors should be aware of the distinction even though they'll almost exclusively buy common stock:

For most retail investors building long-term wealth, common stock is what you want. Preferred stock has a niche role — usually as income substitute for fixed-income investors — but lacks the unlimited upside that makes equity ownership powerful in the first place.

How retail investors should actually buy stocks

The single most consequential decision is whether to buy individual stocks or to buy them through an index fund or ETF. The evidence here is overwhelming.

Multiple studies — including the influential SPIVA reports — show that 80–90% of professional active managers underperform their benchmark index over 10+ year periods, net of fees. Retail investors trying to pick winners with less information and time do even worse. Combined with the behavioral tendency to buy high and sell low, the average individual stock-picker substantially underperforms the market.

The pragmatic conclusion: 90-95% of your stock allocation should be in broad-market index funds (Total US Stock, Total World, S&P 500). A 5-10% "play money" account for individual stocks is fine if it scratches an itch and prevents you from gambling with the core.

What price volatility actually looks like

Stocks are volatile. Not "sometimes" — always. Understanding the historical magnitude of this volatility is the single best preparation against panicking during a downturn:

• Annual returns swing wildly. Since 1928, the S&P 500 has returned anywhere from -43% (1931) to +54% (1933). The +10% average masks enormous year-to-year variation.
• Drawdowns of 20%+ happen roughly every 3-5 years. Drawdowns of 40%+ have happened in 1973-74, 2000-02, 2007-09, and 2020 (briefly).
• Bull markets are longer than bear markets. Over the past century, the market has been at or near all-time highs about 50% of the time and in some level of drawdown the other half.

The investors who win over 30 years aren't the ones who avoid drawdowns. They're the ones who keep buying through them. Dollar-cost averaging — investing a fixed amount on a regular schedule, regardless of price — is the structural defense against your own behavior.

Risk and reward, quantified

Investors with longer horizons can afford more equity exposure because they have more years to recover from drawdowns. A common framework:

For a more personalized split that accounts for risk tolerance, emergency fund status, and goals, use our portfolio allocation calculator.

Taxes on stock returns

Most stock investing happens inside one of three tax wrappers, each with very different consequences:

• Tax-deferred (Traditional 401k, IRA): Contributions reduce current tax; growth is tax-deferred; withdrawals taxed as ordinary income.
• Tax-free (Roth IRA, Roth 401k): After-tax contributions; growth and qualified withdrawals tax-free forever.
• Taxable brokerage: Annual taxes on dividends; capital gains tax on sales (preferential rates if held >1 year — see capital gains).

The order of operations for most investors: capture 401(k) match, fund Roth IRA, max 401(k), then taxable. The right account placement (called asset location) can add 0.1-0.5% per year to long-run returns.

How to actually get started

If you've never bought a stock, the entire setup process takes about 30 minutes:

1. Open a brokerage account — Fidelity, Schwab, or Vanguard for retirement; same plus M1 or any major broker for taxable. All offer commission-free trades and fractional shares.
2. Fund it — link your checking account, transfer in.
3. Buy one broad-market ETF — VTI, ITOT, or VT. One holding is enough to start.
4. Automate — set up automatic transfers from checking on payday. Buy on a schedule, not on impulse.
5. Don't look at it more than quarterly. The investors who do best are the ones who set it and forget it.

For a complete walkthrough, see our how to start investing guide.

How stocks actually generate returns over time

Long-term stock returns come from three distinct sources, and understanding which one is dominant in any given period explains a lot about market behavior:

• Earnings growth. Companies retain and reinvest profits, expanding the business. Over time, profitable reinvestment grows the underlying earnings base. This is the engine that compounds.
• Dividends. Companies distribute a portion of profits directly to shareholders, typically quarterly. Historically, reinvested dividends have accounted for roughly 30–40% of the S&P 500's total return.
• Multiple expansion (or contraction). The price the market is willing to pay per dollar of earnings — fluctuates with sentiment, interest rates, and growth expectations. This is the volatile, unpredictable component.

In any given decade, multiple expansion can dominate (1990s, 2010s) or punish (1970s, 2000s). But over 30-year periods, earnings growth and dividends do the heavy lifting. This is why long-horizon investors who hold through cycles end up far ahead of traders who try to time short-term sentiment.

Common stock vs. preferred stock

Two main classes of stock exist, and most investors should be aware of the distinction even if they'll almost exclusively buy common stock:

How retail investors should buy stocks (almost certainly)

Academic and industry research is overwhelming on this: the vast majority of retail investors achieve better long-run returns by buying broad-market index funds rather than individual stocks. SPIVA (S&P's Persistence Scorecard) shows that even professional active managers underperform their benchmarks over 15+ year periods 85–95% of the time. Retail stock-pickers do worse on average.

If you want stock exposure for retirement: buy VTI (US total market) or VT (world total market). Done. The decision of "which stocks" was made for you by the market via index weighting.

What price volatility actually looks like

The S&P 500's average year produces a ~10% return — but virtually never that exact return. Roughly:

• One in three years has a return of −10% to +10% (boring).
• One in three years has a return of +10% to +30% (great).
• One in three years has a return outside ±10% from typical (extreme — either +30%+ or −10%+).
• Drawdowns of 30%+ happen roughly once a decade.
• Drawdowns of 50%+ happen about twice per generation.

The "average" return is the result of averaging extreme years. Investors who can't tolerate −30% years shouldn't be in 100% stocks.

Risk and reward, quantified

Over the very long run (1926–present, US data), stocks have returned:

• ~10% nominal / ~7% real (after inflation)
• ~15% annualized volatility
• Max drawdown: roughly −85% (Great Depression, 1929–32)
• Second-worst drawdown: roughly −55% (2007–09)
• Zero 30-year rolling periods with negative real returns

Compare to bonds: ~5% nominal / ~2% real, max drawdown roughly −18% (2022). Stocks pay for higher returns with painful volatility along the way.

Taxes on stock returns

• Qualified dividends: Taxed at 0%, 15%, or 20% preferential long-term rates (assuming 60-day holding period satisfied).
• Long-term capital gains: Same rates, applied when you sell after holding > 1 year.
• Short-term gains: Taxed as ordinary income (10–37%). One of the biggest costs of frequent trading.
• Stocks held until death: Step-up in cost basis. Heirs inherit at fair market value with embedded gains erased. Single most powerful estate-planning move for long-term stock holders.

How to actually get started

1. Open a Roth IRA at Fidelity, Schwab, or Vanguard. 15 minutes.
2. Set up an automatic transfer of any amount monthly.
3. Buy one share of VTI or FZROX with each contribution.
4. Don't look at the account for at least 6 months.
5. Repeat for 30+ years.

The strategy that beats 90% of professional managers is "buy a low-cost index fund and never sell." It's not satisfying. It works.

Putting this into practice this week

Concepts only matter if they change behavior. Pick the single most relevant action from the above and put it on your calendar — even 15 minutes of action beats hours of further reading without doing anything. The compound benefit of small consistent moves dwarfs the optimization gain from any single decision. Most people fail at finance not because they don't know what to do, but because they don't act on what they already know.

How this connects to the rest of your financial plan

Personal finance is a system, not a list of independent decisions. The choices you make in one area cascade into others: a tax-loss harvest affects your asset allocation, a 401(k) contribution affects your near-term cash flow, a Roth conversion in 2024 affects RMDs in 2050. Sophisticated financial planning is mostly about understanding these second- and third-order effects. The basics that everyone should master first: emergency fund in cash, capture the full 401(k) match, eliminate high-interest debt, max tax-advantaged accounts before taxable, write down a single-page financial plan and review it annually.

Key takeaways

• Understand the mechanics before you optimize the edges. A solid 70% strategy beats a fragile 95% optimization.
• Automate behavior so you don't depend on willpower. Set-it-and-forget-it is the highest-leverage financial habit.
• Match the strategy to your actual situation, not the situation you wish you had or that influencers describe.
• Review annually; ignore daily noise. The market's short-term moves rarely require a response.
• Consistency over decades beats brilliance over months. Time in the market does the work; trying to time it usually destroys it.

The bottom line

The biggest financial wins come from doing the simple things consistently for decades — not from finding the cleverest single trick. Build the foundation first; the optimizations layer on top once the foundation is solid. The investors who end up wealthy aren't the ones who picked the best stocks. They're the ones who saved consistently, kept costs low, took appropriate risk for their horizon, and didn't sell during crashes. Everything else is detail.

Continue your learning at Krovea

Krovea exists to connect every concept on this page to the next one you should read. Use the site-wide search for any term you're unsure about. Run the relevant numbers on a Krovea calculator with your actual situation — projections beat speculation every time. Look up unfamiliar jargon in the A–Z dictionary. Most readers find their first session on Krovea answers one question and surfaces three more — that's how compounding knowledge works. Subscribe to the weekly briefing if you want the highest-impact one topic delivered without the noise of constant financial media.

A final note on financial decision-making

Every concept covered here exists because someone made a costly mistake first and the rule emerged from the consequences. The 401(k) match exists because Americans weren't saving enough. The Roth IRA exists because mid-century retirees got taxed twice on their nest eggs. The wash-sale rule exists because traders abused loss harvesting. Treat each piece of advice not as arbitrary rules to memorize but as the encoded lessons of prior generations of investors. The framework that survives recessions, regulatory changes, and market manias has been stress-tested in ways no individual could replicate. Following the boring conventional wisdom isn't unimaginative — it's the result of selecting for what actually works at scale across millions of investors and dozens of market cycles.

One last thing — when in doubt, do less

The average investor underperforms their own funds by 1–2% per year because of trading mistakes — entering after rallies, exiting after crashes, switching strategies after they stop working. Inaction has a cost, but action has a much bigger one. When you're not sure what to do, the right answer is usually nothing. Pick the next paycheck's contribution, automate it, and look away until tax season.