Investing: An Introduction

Search Fintrev

Search our guides, reviews and glossary.

Investing means putting money into an asset, such as a stock, bond, fund or property, in the expectation that it will pay you income, grow in value, or both. In exchange for that potential return, you accept the risk of losing some or all of what you put in. The basics of investing come down to three things: knowing what each type of asset can and cannot do for you, matching your money to how soon you will need it, and keeping costs and complexity low enough that you will stick with the plan.

How Investing Makes Money

An investment can pay you in two ways:

1. Income. Interest from bonds and bank deposits, dividends from stocks, and rent from property are paid while you hold the asset.
2. Appreciation. The price of the asset rises above what you paid. When you sell, the difference is a capital gain. If the price falls and you sell, it is a capital loss.

The engine behind long-term investing is compounding: returns that are reinvested start earning returns of their own. The formula for a lump sum is:

Future value = Principal × (1 + annual return)^years

Hypothetical example, assuming a constant 6% annual return with all gains reinvested and no taxes or fees: $1,000 grows to $1,060 after one year, about $1,791 after ten years, and about $5,743 after thirty years. Most of the growth arrives in the later years, because the base it compounds on keeps getting larger. A quick shortcut, the Rule of 72, estimates how long money takes to double: divide 72 by the annual return. At 6%, that is roughly 12 years.

Real investments do not earn a steady return each year. Prices rise and fall, and a single bad year can erase several good ones in the short run. Compounding describes what happens over long stretches, not what happens in any given year.

Inflation Sets the Real Hurdle

A return only adds to your purchasing power if it beats inflation. The approximate real return is the nominal return minus the inflation rate. Hypothetical example: an account paying 4% interest during a year with 3% inflation leaves you about 1% better off in purchasing power. If inflation is 5%, the same account loses ground even though the balance grew.

The Investment Risk Ladder

The main asset classes can be ranked by ascending risk. Each rung offers more potential return than the one below it and asks you to tolerate more uncertainty.

Cash

Bank deposits are the simplest investment and usually the first one people own. A savings account tells you the interest rate you will earn, and in the U.S., deposits at an FDIC-insured bank are protected up to $250,000 per depositor, per insured bank, for each account ownership category. Your principal comes back to you.

The drawback is return. Interest on savings accounts has seldom kept pace with inflation over long periods.

Certificates of deposit (CDs) trade some flexibility for a higher rate. You agree to leave money with the bank for a fixed term, from a few months to several years, and typically pay a penalty if you withdraw early. Money market funds are another cash-like option, holding short-term, high-quality debt. Note that a money market fund is an investment product, not a bank deposit, so it is not covered by FDIC insurance.

Cash is the right home for an emergency fund and for money you need within the next year or two. It is a poor engine for growth.

Bonds

A bond is a loan from you to the issuer, usually a government or a corporation. The issuer pays interest, often at a fixed rate, and returns the face value when the bond matures. The U.S. government issues Treasuries, states and local governments issue municipal bonds, and companies issue corporate bonds.

Bond prices move in the opposite direction to interest rates, which are heavily influenced by central banks such as the Federal Reserve. When rates rise, newly issued bonds pay more, so existing bonds paying lower rates become less valuable on the market. When rates fall, existing bonds gain value.

Bond risks include:

• Interest rate risk: price drops when rates rise, which matters if you sell before maturity.
• Credit risk: the issuer may miss payments or default. Corporate bonds carry more of this than Treasuries.
• Inflation risk: fixed payments buy less as prices rise.

Bonds generally fluctuate less than stocks, which is why many portfolios use them to steady overall returns.

Mutual Funds

A mutual fund pools money from many investors and hands it to a professional manager, who buys stocks, bonds or other assets. You receive shares in proportion to what you put in. A modest investment can give you a fractional stake in hundreds of companies. Minimum initial investments vary by fund, and some funds have none.

Mutual funds come in two broad styles:

• Passive (index) funds aim to match an index such as the S&P 500. Because the manager simply tracks the index, these funds take less effort to run and tend to charge lower fees.
• Actively managed funds try to beat the market by selecting and adjusting holdings. They typically charge higher fees, and those fees reduce your return every year whether or not the manager outperforms.

Mutual fund trades are processed once a day, after the market closes, at the fund’s net asset value (NAV): the value of its holdings minus liabilities, divided by the number of shares outstanding.

Exchange-Traded Funds (ETFs)

ETFs are baskets of investments much like mutual funds, but they trade on an exchange throughout the day like a single stock. Their price changes during the trading session as buyers and sellers transact.

An ETF can track a broad index such as the S&P 500 or the Dow Jones Industrial Average, or a narrower slice of the market: a country or region, a sector such as biotechnology, a commodity, or a bond category. Broad index ETFs are the most widely used. Narrow or leveraged ETFs behave very differently from broad ones and carry concentrated risk.

Stocks

Buying a stock makes you a part-owner of a company, however small your stake. Stocks pay off in two ways:

• Price appreciation. If other investors become willing to pay more for the shares than you did, you can sell for a capital gain.
• Dividends. Some companies share part of their profits with shareholders as regular cash payments.

The risks are real. Companies can lose money, share prices can fall well below your purchase price, and if a company goes bankrupt, shareholders are last in line, behind lenders and bondholders, to recover anything. For that reason, many advisors suggest keeping money you will need within about five years out of stocks.

Risk also varies within stocks:

• Large-cap companies (large, established businesses) tend to be more stable, with slower growth.
• Mid-cap companies sit in between.
• Small-cap companies can grow quickly but are more likely to stumble.
• Penny stocks, which the SEC generally defines as shares trading below $5, are often issued by very young or financially troubled companies. They can be thinly traded and hard to research.

Alternative Investments

At the top of the ladder sits everything that is not a stock, bond, or fund holding them:

• Real estate. You can buy property directly, which takes significant capital and ongoing effort, or buy shares of a real estate investment trust (REIT), a company that owns and manages properties. Publicly traded REITs trade like stocks. To keep their tax status they must distribute at least 90% of their taxable income to shareholders each year, so their dividends tend to be high.
• Hedge funds and private equity. These are generally limited to accredited investors, a legal category based on income or net worth. Hedge funds use complex strategies that aim to profit in rising or falling markets. Private equity firms buy, restructure and sell companies. Both typically lock up investor money for years.
• Commodities. These are physical goods such as gold, crude oil and agricultural products, usually held through funds or ETFs that track their prices. They are often used as a hedge against inflation.

Cryptocurrencies, futures and options are also now treated as separate asset classes. They can be highly volatile, and options and futures involve leverage that can multiply losses.

Diversification: Why the Mix Matters

Diversification is the main defense against a falling market. By holding assets that do not all move together, you avoid having your outcome depend on a single company, sector or asset class.

Diversification works at two levels:

1. Within an asset class. One index fund holding hundreds of stocks spreads company-specific risk far more widely than owning three stocks.
2. Across asset classes. Combining stocks with bonds and cash means a stock market slump hits only part of the portfolio.

Diversification lowers risk. It does not eliminate it. In a broad market decline, most stocks fall together, and a diversified stock fund falls with them. What diversification prevents is the permanent loss that comes from concentrating in something that fails.

How to Start Investing: Where to Begin

Starting does not require much money, since many funds have low or no minimums and many brokers allow small, regular purchases. A sensible sequence looks like this:

1. Set aside an emergency fund first. Keep several months of essential expenses in cash so a job loss or car repair does not force you to sell investments at a bad time.
2. Pay down high-interest debt. A guaranteed saving on credit card interest is hard for any investment to beat reliably.
3. Match each goal to its time horizon. Money for a house deposit in two years belongs lower on the risk ladder than money for retirement in thirty years. The time horizon matters more than any market forecast.
4. Choose the right account. In the U.S., a 401(k) or an individual retirement account (IRA) offers tax advantages for retirement savings, and an employer match adds money on top of your contribution. A regular taxable brokerage account suits other goals.
5. Start with broad index funds or ETFs. A fund tracking the S&P 500, a total market fund, or a simple mix of stock and bond index funds covers the core. Warren Buffett has repeatedly said that most investors would do better holding a low-cost S&P 500 index fund than paying for active management.
6. Keep costs low. Fees come out of your return every year (see the example below).
7. Invest regularly. Contributing a fixed amount on a schedule, known as dollar-cost averaging, removes the need to decide when the market is “right.”
8. Rebalance. You do not have to own every asset type. Once a year or so, check whether your mix has drifted far from your target and adjust.

What Fees Do Over Time

Fund costs are expressed as an expense ratio, the percentage of your assets deducted each year. A difference that looks small compounds into a large one.

Hypothetical example, assuming a $10,000 investment, a constant 7% annual return before fees, and no taxes or further contributions: a fund costing 0.1% a year leaves about a 6.9% net return, growing to roughly $73,900 after 30 years. A fund costing 1.1% a year leaves about 5.9%, growing to roughly $55,900. The 1 percentage point difference in fees costs about $18,000, nearly twice the original investment.

Investing vs. Trading

Investing usually means buying and holding diversified assets for years. Trading means buying and selling frequently to profit from short-term price moves. For most people, a long-term, buy-and-hold, diversified, low-cost approach is more suitable, because it reduces costs, taxes on short-term gains, and the temptation to react to daily noise. Trading tools such as chart patterns are not a prerequisite for building a sound portfolio.

Setting Realistic Expectations in Any Economy

Different economic conditions have tended to favor different assets. These are tendencies, not rules, and they do not repeat on schedule.

When the Economy Is Strong

• Stocks have tended to do well, since employment and spending lift company profits.
• Bonds can struggle, because strong growth often comes with rising interest rates, which lower the value of existing bonds.
• Real estate often benefits from strong employment and incomes, though sharply higher interest rates raise mortgage costs and can cool the housing market.

When the Economy Is Slowing

• Stocks often fall as profit expectations drop and investors grow cautious. Extended declines of this kind are known as bear markets.
• Bonds have tended to hold up better, because interest rates often fall in downturns, raising the value of existing bonds.

Special Situations

• Gold has often attracted buyers during periods of fear, whether from economic stress, political uncertainty or inflation worries.
• Cash and money market funds attract investors seeking stability during uncertain times. They will not produce large gains, but their value does not swing.

Because nobody reliably knows which environment comes next, holding a diversified mix is more dependable than repositioning a portfolio around forecasts.

The Bottom Line

Money you need soon stays low on the risk ladder. Money with decades to grow can climb higher, because stocks have historically returned more than bonds over long periods despite much larger short-term swings. That money is usually best held through broad, low-cost index funds rather than individual picks. Three principles keep beginners out of most trouble: do not buy anything you do not understand, ignore hot tips from unreliable sources, and spread your money across different assets.

If you want personal guidance, a fee-only financial advisor is paid for advice rather than commissions on products sold, which reduces the conflict of interest in what they recommend.

FAQs