Financial markets: Resource allocation and investment
Financial markets channel money from people who have it (savers) to people who need it (borrowers). They're the infrastructure that lets companies raise cash, lets investors grow wealth, and lets the broader economy allocate resources where they're most productive.
Intermediation and price discovery
At their core, financial markets solve a matching problem: surplus units (savers with extra funds) need to connect with deficit units (borrowers who need capital). Markets make this happen efficiently.
Beyond matching buyers and sellers, financial markets serve several key functions:
- Price discovery: Supply and demand interactions determine what financial assets are actually worth. If lots of people want to buy a stock and few want to sell, the price rises. This process continuously updates asset values to reflect new information.
- Liquidity: Investors can buy and sell assets quickly without huge transaction costs. Without liquidity, you might own a great asset but have no way to convert it to cash when you need to.
- Capital formation: Companies raise funds by issuing stocks and bonds. An Initial Public Offering (IPO), for example, lets a private company sell shares to the public for the first time, generating capital for expansion.
- Risk management: Instruments like options and futures let investors hedge against unfavorable price movements or transfer risk to parties more willing to bear it.
Economic policy and information
Financial markets don't just serve individual investors. They're also a transmission mechanism for monetary policy. When the Federal Reserve adjusts interest rates, those changes ripple through financial markets into borrowing costs, investment decisions, and spending across the economy.
- Market prices reflect collective expectations about inflation, growth, and corporate earnings, giving policymakers and businesses real-time signals about economic conditions.
- Stock market indices (like the S&P 500) serve as barometers of investor confidence and overall market sentiment.
- By directing capital toward its most productive uses, financial markets support broader economic growth and development.
Primary vs secondary markets: A comparison
Primary markets: New security issuance
The primary market is where brand-new securities are created and sold for the first time. This is where companies and governments actually raise capital.
- IPOs introduce a company's stock to public investors for the first time. Facebook's 2012 IPO, for instance, raised about $16 billion.
- Bond auctions let governments issue new debt securities. The U.S. Treasury regularly auctions T-bills, notes, and bonds to fund government spending.
- Private placements sell securities to a small, select group of investors (often institutional) rather than the general public.
- Underwriters (typically investment banks) help price and distribute new securities, taking on the risk of selling them to the public.
Secondary markets: Trading existing securities
Once securities exist, the secondary market is where investors trade them with each other. The original issuer doesn't receive any money from these trades.
- The New York Stock Exchange (NYSE) and NASDAQ are the most well-known secondary markets for stocks.
- Over-the-counter (OTC) markets handle trading of securities not listed on major exchanges, including many bonds and smaller company stocks.
- Electronic trading platforms have dramatically increased speed, accessibility, and efficiency in secondary markets.
- Secondary markets matter because they provide liquidity. People are more willing to buy securities in the primary market if they know they can sell them later in the secondary market.
Capital vs money markets
This distinction is about the time horizon of the instruments being traded:
| Feature | Capital Markets | Money Markets |
|---|---|---|
| Maturity | Greater than one year | One year or less |
| Instruments | Stocks, corporate/government bonds | Treasury bills, commercial paper, CDs |
| Purpose | Finance long-term investment and growth | Manage short-term liquidity and cash needs |
| Risk level | Generally higher | Generally lower |
Capital markets fund things like factory construction or long-term government projects. Money markets help businesses cover payroll next week or park cash safely for a few months.
Financial instruments: Characteristics and functions
Equity and debt instruments
Stocks (equity) represent partial ownership in a company. If you own shares of a company, you're a part-owner. This typically gives you:
- Voting rights on major corporate decisions
- A claim on profits through dividends (if the company pays them)
- Potential capital gains if the stock price rises
The tradeoff is that stock values fluctuate based on company performance, market conditions, and investor sentiment. If the company fails, stockholders are last in line to recover their investment.
Bonds (debt) work differently. When you buy a bond, you're lending money to the issuer (a corporation or government). In return, you receive:
- Regular interest payments (called coupon payments) at a fixed or variable rate
- Repayment of the principal (face value) when the bond matures
Bond risk depends heavily on the issuer's creditworthiness. U.S. Treasury bonds are considered nearly risk-free, while corporate bonds from financially shaky companies ("junk bonds") carry much higher risk and therefore offer higher yields.
Derivatives and pooled investments
Derivatives are contracts whose value is based on (derived from) some underlying asset like a commodity, currency, or interest rate. The two most common types:
- Options give you the right, but not the obligation, to buy or sell an asset at a set price within a specific timeframe. You pay a premium for this flexibility.
- Futures obligate both parties to buy or sell an asset at a predetermined price on a future date. Unlike options, neither side can walk away.
Pooled investments let individual investors access diversified portfolios without buying each security individually:
- Mutual funds collect money from many investors and invest in a basket of stocks, bonds, or other assets, managed by a professional fund manager.
- Exchange-traded funds (ETFs) are similar to mutual funds but trade on exchanges like stocks throughout the day. Many track specific indices (like an S&P 500 ETF).
Money market instruments like Treasury bills and certificates of deposit (CDs) provide short-term, low-risk options for parking cash.
Risk, return, and diversification in investment strategies
Risk-return relationship
The risk-return tradeoff is one of the most fundamental concepts in finance: higher potential returns come with higher levels of risk. A savings account is safe but earns very little. Stocks can earn much more over time but can also lose significant value.
Risk comes in two forms:
- Systematic risk (market risk) affects the entire market. Think recessions, interest rate changes, or geopolitical crises. You can't diversify this away because it hits everything.
- Unsystematic risk is specific to a particular company or industry. A product recall hurts one company; a new regulation might hurt one sector. This type of risk can be reduced through diversification.
The Capital Asset Pricing Model (CAPM) formalizes this relationship. It says an asset's expected return should equal the risk-free rate plus a premium for the systematic risk it carries. The formula:
Where is the risk-free rate, measures the asset's sensitivity to market movements, and is the market risk premium.
Common risk measures include standard deviation (how much returns vary from the average), beta (sensitivity to market movements), and Value at Risk (the maximum expected loss over a given period at a given confidence level).
Portfolio theory and diversification
Modern Portfolio Theory (MPT), developed by Harry Markowitz, argues that you shouldn't evaluate investments in isolation. What matters is how each asset contributes to the overall risk and return of your portfolio.
The efficient frontier is a curve showing the set of portfolios that offer the highest expected return for each level of risk. Any portfolio below this curve is suboptimal because you could get better returns for the same risk (or the same returns with less risk).
Diversification works because different assets don't always move in the same direction at the same time. Strategies include:
- Asset class diversification: Spreading investments across stocks, bonds, and real estate. When stocks drop, bonds often hold steady or rise.
- Geographic diversification: Investing internationally protects against risks specific to one country's economy or political situation.
- Sector diversification: Holding positions across technology, healthcare, finance, energy, and other industries reduces the impact of any single sector downturn.
Rebalancing is the practice of periodically adjusting your portfolio back to its target allocation. If stocks surge and now make up 80% of your portfolio instead of the intended 60%, you'd sell some stocks and buy other assets to restore balance.