Understanding Markets
What Are You Actually Buying?
When you invest, you're buying assets — things that have value and can generate returns. Understanding what these assets are helps you make better decisions about owning them.
This chapter covers the main asset classes you'll encounter as an individual investor.
Stocks (Equities)
What They Are
A stock is a share of ownership in a company. When you buy a share of Apple, you own a tiny piece of Apple Inc.
As an owner, you're entitled to:
- A proportional share of profits (through dividends or reinvestment)
- A vote in company decisions (usually minor for small shareholders)
- A claim on assets if the company liquidates (after creditors are paid)
How They Generate Returns
Capital appreciation: If the company becomes more valuable, your shares become worth more. You can sell them for a profit.
Dividends: Some companies pay out a portion of profits to shareholders. You receive cash payments, typically quarterly.
Total return = Capital gains + Dividends
The Range of Stocks
Stocks vary enormously:
By size (market capitalization):
- Large-cap: Big, established companies (Apple, Microsoft)
- Mid-cap: Medium-sized companies
- Small-cap: Smaller companies (more volatile, potentially higher growth)
By style:
- Growth: Companies expected to grow faster than average (often higher valuations, fewer dividends)
- Value: Companies trading below what they might be worth (often lower valuations, may pay dividends)
By sector:
- Technology, healthcare, financials, consumer goods, energy, etc.
- Different sectors perform differently in different economic conditions
By geography:
- U.S. stocks
- International developed (Europe, Japan, etc.)
- Emerging markets (China, India, Brazil, etc.)
What Moves Stock Prices
Company performance: Earnings, revenue, growth prospects.
Expectations: Prices reflect what investors expect, not just current reality.
Interest rates: Higher rates generally pressure stock prices.
Economic conditions: Recessions hurt most stocks; expansions help.
Sentiment: Fear and greed move markets beyond fundamentals.
Stock Risk
Stocks are volatile. Individual stocks can lose 50%+ of their value — or go to zero. Even broad markets drop 30-50% in severe downturns.
But historically, diversified stock portfolios have recovered and grown over time.
Bonds (Fixed Income)
What They Are
A bond is a loan. You lend money to a government or corporation. They promise to pay you interest and return your principal at maturity.
Key terms:
- Principal (face value): The amount you lend
- Coupon: The interest rate they pay you
- Maturity: When they pay back the principal
- Yield: The effective return you receive
How They Generate Returns
Interest payments: Regular coupon payments (usually semi-annually).
Capital appreciation/depreciation: If interest rates change, bond prices move in the opposite direction. Sell before maturity and you might gain or lose.
The Range of Bonds
By issuer:
- Government bonds (U.S. Treasuries, municipal bonds)
- Corporate bonds (investment grade vs. high yield/"junk")
- International bonds
By maturity:
- Short-term (less than 3 years)
- Intermediate (3-10 years)
- Long-term (10+ years)
Longer maturities mean more sensitivity to interest rate changes.
By credit quality:
- Investment grade (lower risk, lower yield)
- High yield (higher risk, higher yield)
What Moves Bond Prices
Interest rates: When rates rise, existing bond prices fall. When rates fall, existing bond prices rise.
Credit quality: If the issuer's ability to pay becomes questionable, bond prices fall.
Inflation expectations: Higher expected inflation hurts bond prices.
Bond Risk
Bonds are generally less volatile than stocks, but they're not risk-free:
- Interest rate risk (prices move opposite to rates)
- Credit risk (the issuer might not pay)
- Inflation risk (fixed payments lose purchasing power)
High-quality, short-term bonds are among the safest investments. Long-term or low-quality bonds carry meaningful risk.
Cash and Cash Equivalents
What They Are
Cash: Money in savings accounts, checking accounts.
Cash equivalents: Money market funds, CDs (certificates of deposit), Treasury bills.
How They Generate Returns
Interest payments. Currently, high-yield savings accounts and money market funds pay meaningful rates; historically, these have been low.
Cash Risk
Inflation risk: The main risk of cash is losing purchasing power over time.
Opportunity cost: Money in cash isn't growing like invested money.
The Role of Cash
Cash provides:
- Safety (no market risk)
- Liquidity (access when you need it)
- Optionality (available for opportunities)
But too much cash over long periods costs you growth.
Other Asset Classes
Real Estate
Direct ownership: Buying property (homes, rental properties).
REITs (Real Estate Investment Trusts): Companies that own real estate, traded like stocks. Provides real estate exposure without buying property.
Real estate returns: Rental income + property appreciation.
Real estate risks: Illiquidity, concentration, management, leverage, market cycles.
Commodities
Physical goods: gold, oil, agricultural products, metals.
Returns: Price changes only (no dividends or interest).
Role: Sometimes provides diversification, especially during inflation.
Risks: Highly volatile, no inherent return, storage costs.
Cryptocurrency
Digital assets like Bitcoin and Ethereum.
Returns: Price changes only (though some offer staking yields).
Role: Highly speculative. Some view as inflation hedge or diversifier.
Risks: Extreme volatility, regulatory uncertainty, security concerns, unproven track record.
For most investors: If interested, keep it a small portion of your portfolio.
How Assets Work Together
Correlation
Assets don't all move together. When stocks fall, bonds often hold steady or rise. When U.S. stocks struggle, international stocks might do better.
Owning assets that don't move in lockstep reduces portfolio volatility.
Diversification
Owning multiple assets with different characteristics reduces risk:
- Many stocks, not one stock
- Multiple asset classes, not just stocks
- Multiple geographies, not just domestic
We'll cover this more in the portfolio chapter.
Funds: The Easy Way to Own Assets
What Funds Are
Funds pool money from many investors to buy baskets of assets. Instead of buying 500 individual stocks, you buy one fund that owns 500 stocks.
Mutual Funds
Pooled investments managed by a fund company. You buy shares at the end-of-day price. Can be actively managed (manager picks investments) or passively managed (tracks an index).
ETFs (Exchange-Traded Funds)
Similar to mutual funds but trade like stocks throughout the day. Mostly passively managed. Generally lower fees.
Index Funds
Funds designed to match a market index (like the S&P 500). No active management — they just buy what's in the index. Very low fees.
Why index funds matter: Most actively managed funds underperform their benchmark index after fees. Index funds give you market returns at minimal cost.
Target-Date Funds
Funds designed for a specific retirement year. They automatically adjust asset allocation as you approach that date — more stocks when young, more bonds as you age.
Simple option for people who want one-fund solutions.
What's Next
You understand what you're buying. Now let's understand the relationship between risk and return.
Next chapter: Risk and return — the fundamental tradeoff.