Investing is how money grows over time — through stocks, bonds, mutual funds, ETFs, and retirement accounts like 401(k)s and IRAs. The right approach depends on your age, your goals, and how much risk you can tolerate. This section covers the foundations of investing in plain language: what each type of account and investment is, how they work together, and how to make decisions that fit your situation — whether you are just starting out or already thinking about retirement.
Start Here
New to investing? Start here
Three foundations first.
Key Investing Decisions
Plain-language starting points: what investing actually is, and the two building blocks of nearly every investment portfolio.
What Is Investing?
Investing is putting money into stocks, bonds, funds, or real estate to grow over time. How it differs from saving, why compound growth matters, and the basic decisions every investor makes.
What Is a Stock?
A stock is a share of ownership in a company. How shares earn money through price growth and dividends, what affects stock prices, and the risks to understand before you buy.
What Is a Bond?
A bond is a loan you make to a government or company in exchange for interest payments. Why bonds matter for portfolio stability, how they differ from stocks, and what to know about bond risk.
Funds Explained: Mutual Funds & ETFs
Most everyday investors don’t buy individual stocks and bonds — they buy funds. These guides cover what funds are, how they differ, and how to choose between mutual funds and ETFs.
What Is a Mutual Fund?
A mutual fund pools money from many investors to buy a basket of stocks, bonds, or other assets. How fund prices are set, what expense ratios actually cost you, and when mutual funds make sense.
ETFs Explained
Exchange-traded funds (ETFs) trade like stocks but hold a basket of investments like a mutual fund. The key differences, lower-cost advantages, and what to know about trading them.
Mutual Funds vs. ETFs
Both spread your money across many investments. The differences in pricing, fees, tax efficiency, and trading mechanics — and a framework for choosing which fits your situation.
Retirement Accounts
Where you hold investments matters as much as what you invest in. These guides cover the three most common retirement account types and how to choose between them.
401(k) for Beginners
A 401(k) is an employer-sponsored retirement account where contributions come out before taxes. How matching works, contribution limits, and what to do when you change jobs.
What Is a Roth IRA?
A Roth IRA lets you contribute after-tax money that grows tax-free and is withdrawn tax-free in retirement. Income limits, contribution rules, and when a Roth makes more sense than a traditional IRA.
IRA vs. 401(k)
Both let you save for retirement with tax advantages, but they work differently. The contribution limits, employer match rules, and how to use both together for maximum benefit.
Fund Selection & Strategy
Once you know what funds are, the next decision is which kind to choose. These guides cover the index vs. active debate, target-date funds, and the case for low-cost investing.
Index Funds vs. Actively Managed Funds
Index funds track a market benchmark; active funds try to beat it. Why most active managers underperform their benchmark over time, and the cost difference that compounds for decades.
Target-Date Funds Explained
Target-date funds automatically adjust your stock/bond mix as you approach retirement — one-fund simplicity for hands-off investors. How they work, what to watch for, and when they fit.
Index Funds and ETFs: The Basics
Index funds and ETFs are how most everyday investors actually buy “the market.” A foundational guide to passive investing, low costs, and broad diversification.
Risk, Taxes & Investing Later in Life
Once the basics are in place, the next questions are how much risk to take, how taxes affect what you keep, and how to invest if you started later than planned.
Understanding Investment Risk
Risk isn’t just “will I lose money” — it’s several different things. How market risk, inflation risk, and concentration risk each affect your portfolio, and how diversification reduces them.
Tax-Loss Harvesting Explained
Selling losing investments to offset gains can reduce your tax bill — if you do it right. How tax-loss harvesting works, the wash-sale rule, and when the strategy actually helps.
How to Start Investing in Your 50s and 60s
It’s not too late, but the strategy is different. Catch-up contributions, asset allocation closer to retirement, and how to balance growth with the risk of a downturn at the wrong time.
More Investing Guides
More investing topics — from opening your first account and investing regularly to adjusting your strategy as retirement approaches.
What Is a Brokerage Account?
A brokerage account is how most people invest in stocks, bonds, and funds outside of a 401(k). Here’s how it works and what to look for.
How to Open a Brokerage Account
Opening a brokerage account takes about 15 minutes. Here’s a step-by-step walkthrough of what to expect and how to choose the right one.
Dollar-Cost Averaging Explained
Investing a fixed amount on a regular schedule — regardless of market conditions — is one of the most reliable investing habits you can build.
What Is Rebalancing?
Rebalancing means adjusting your portfolio back to its target allocation when market movements shift it out of balance. Here’s how and when to do it.
Should You Invest or Pay Off Debt First?
Whether to invest or pay down debt depends on the interest rate. Here’s the decision framework most financial advisors use.
How to Invest in Your 50s and 60s
Investing near retirement means balancing growth with protection. Here’s how to adjust your strategy as the timeline shortens.
Traditional IRA Explained
How a traditional IRA works, who qualifies for the deduction, 2025 contribution limits, and how it compares to a Roth IRA.
How to Build an Investment Portfolio
Choose the right asset allocation, diversify with low-cost index funds, and rebalance over time to keep your plan on track.
How Compound Interest Grows Your Money
Why starting early is the most powerful investing decision you can make — and how compounding turns small contributions into big balances.
Investing for Retirement: A 10-Year Countdown
How to shift from growth to protection in the decade before retirement — covering catch-up contributions, sequence risk, and income planning.
What Is a Dividend?
How company dividends work, how they are taxed, the difference between qualified and ordinary dividends, and whether dividend investing fits your strategy.
How to Avoid Common Investing Mistakes
Timing the market, panic selling, high fees, and poor diversification cost investors billions. Learn the traps and how to stay out of them.
What Is Bitcoin?
What Bitcoin is, how the blockchain works in plain English, how to buy and store it, what it’s actually used for, and the real risks every new buyer should know.
Bonds and Fixed Income
How bonds pay interest, the difference between Treasuries, corporates, and munis, and how fixed income smooths out a portfolio over time.
Asset Allocation
How to split your money across stocks, bonds, cash, and alternatives based on your timeline and risk tolerance — and how that mix should change with age.
Investing Terms Explained
The vocabulary behind accounts, funds, and share prices, defined without jargon.
What Are Capital Gains? How Profit on Investments Is Taxed
A capital gain is the profit you earn when you sell something for more than you paid for it.
What Is a 401(k) Rollover?
A 401(k) rollover is the process of moving money from a 401(k) at one job to another retirement account — either a new employer’s 401(k) or an Individual Retirement Account (IRA).
What Is a 403(b)? The Retirement Plan for Schools and Nonprofits
A 403(b) is a workplace retirement savings plan offered to employees of public schools, colleges, certain nonprofits, hospitals, and some religious organizations.
What Is a 457 Plan? The Retirement Plan for Government Workers
A 457 plan — most commonly a 457(b) — is a tax-advantaged retirement savings plan offered to state and local government employees and to some nonprofit workers.
What Is a Blue-Chip Stock? Shares of Large, Established Companies
A blue-chip stock is a share of a large, well-established, financially solid company with a long track record of reliable performance.
What Is a Bull and Bear Market?
A bull market is a period when investment prices are rising or expected to rise, while a bear market is a period when prices are falling.
What Is a Fiduciary?
A fiduciary is a person or institution legally and ethically required to act in someone else’s best interest — not their own.
What Is a Money Market Fund?
A money market fund is a type of mutual fund that invests in very short-term, high-quality debt — things like Treasury bills, certificates of deposit, and commercial paper.
What Is a Portfolio? Your Complete Collection of Investments
An investment portfolio is the entire collection of investments you own, considered together as a whole.
What Is a Prospectus? The Disclosure Document Behind an Investment
A prospectus is a formal legal document that provides important details about an investment so you can make an informed decision before putting money in.
What Is a REIT? Investing in Real Estate Without Buying Property
A REIT, or real estate investment trust, is a company that owns, operates, or finances income-producing real estate — think apartment buildings, office towers, shopping centers, or warehouses.
What Is a Robo-Advisor? Automated Investing Explained
A robo-advisor is an online service that builds and manages an investment portfolio for you automatically, using computer algorithms instead of a human picking each investment.
What Is a SEP IRA? A Retirement Plan for the Self-Employed
A SEP IRA — Simplified Employee Pension Individual Retirement Arrangement — is a retirement account designed for self-employed people and small business owners.
What Is a Share? Owning a Piece of a Company
A share is a single unit of ownership in a company. When you buy a share, you own a small piece of that business and become a part-owner — a shareholder.
What Is a Shareholder? Your Role as a Company Owner
A shareholder is any person or organization that owns one or more shares of a company.
What Is a Stock Exchange? Where Stocks Are Bought and Sold
A stock exchange is an organized marketplace where shares of publicly traded companies are bought and sold.
What Is a Stock Split? Why a Company Divides Its Shares
A stock split is when a company increases its number of shares by dividing each existing share into more shares, while proportionally lowering the price of each one.
What Is a Target-Date Fund? Investing on Autopilot
A target-date fund is a single mutual fund — often the default option in workplace retirement plans — that automatically shifts its mix of stocks and bonds to become more conservative as…
What Is a Tax-Deferred Account? How Deferring Taxes Builds Wealth
A tax-deferred account is one where you don’t pay taxes on your investment earnings each year.
What Is a Ticker Symbol? How Stock Abbreviations Work
A ticker symbol is a short, unique combination of letters that identifies a publicly traded company’s stock — or an ETF or mutual fund — on a stock exchange.
What Is an Expense Ratio? How Fund Fees Affect Your Returns
An expense ratio is the annual fee a mutual fund or exchange-traded fund (ETF) charges to cover its operating costs.
What Is an Index Fund?
An index fund is a type of mutual fund or exchange-traded fund (ETF) designed to track the performance of a market index — like the S&P 500 — rather than trying to beat it.
What Is Cost Basis? How It Determines Your Investment Taxes
Cost basis is the original amount you paid for an investment, including any fees or commissions.
What Is Diversification in Investing?
Diversification is the practice of spreading your investments across different assets so that no single loss can wipe out your savings.
What Is Dividend Yield? Measuring Income From Stocks
Dividend yield is a ratio that shows how much a company pays out in dividends each year compared to its share price, expressed as a percentage.
What Is Liquidity? (And Why It Matters for Your Finances)
Liquidity refers to how quickly and easily an asset can be converted to cash without losing value.
What Is Market Capitalization? How a Company’s Size Is Measured
Market capitalization — often shortened to “market cap” — is the total dollar value of all of a company’s outstanding shares of stock.
What Is Net Asset Value (NAV)? How Fund Prices Are Set
Net asset value, or NAV, is the per-share value of a mutual fund or ETF.
What Is Short Selling? Betting Against a Stock
Short selling is a strategy where an investor borrows shares of a stock and sells them right away, hoping to buy them back later at a lower price and return them to the lender, pocketing the difference.
What Is Technical Analysis?
There are many ways to decide when to buy or sell a stock. Fundamental analysis looks at the company itself — its earnings, debt, products, and competitive position.
What Is the Law of Diminishing Returns?
The first hour you spend researching a stock teaches you a lot. The tenth hour, researching the same stock, teaches you much less.
Markets, Trading and Investment Types
How markets move, what the different investments are, and where the real risks sit.
Foreign Currency (Forex) Trading Explained
Forex — short for “foreign exchange” — is the trading of one country’s currency for another, done purely to profit from changes in the exchange rate.
How to Create a Stock Watch List
A watch list is a running list of stocks you’re interested in but haven’t bought yet.
Options Trading Basics: Calls, Puts, and the Risks
A stock option is a contract that gives you the right, but not the obligation, to buy or sell a stock at a set price before a specific date.
The History of the Rule of 72: A 500-Year-Old Shortcut
The Rule of 72 says that if you divide 72 by an annual rate of return, you get roughly the number of years it takes for money to double.
Types of Investments: A Beginner’s Overview
Stocks, bonds, mutual funds, real estate, cryptocurrency — if you’re new to investing, the sheer number of options can feel overwhelming before you’ve even opened an account.
Understanding Market Volatility
Volatility measures how much, and how quickly, a price moves — up or down.
What is Investment Liquidity and Why Does it Matter?
Imagine you need $5,000 for a medical bill next week. If that money is sitting in a savings account, you can have it in your checking account within a day.
What Makes Stock Prices Go Up and Down?
A stock that trades at $50 in the morning might trade at $52 an hour later, even though nothing about the underlying business has actually changed in that time.
What to Do with Your Investments in Retirement
Building investments is one challenge. Knowing what to do with them once you retire is another.
Why Most Day Traders Lose Money
Studies of day traders — people who buy and sell stocks within the same trading day — consistently find that most of them lose money over time, with figures in various studies commonly…
Latest Investing Articles
- The History of the Rule of 72: A 500-Year-Old Shortcut
The Rule of 72 was first written down in 1494 by Luca Pacioli, 120 years before logarithms existed. Where it came from, why 72, and how it survived 500 years. - Options Trading Basics: Calls, Puts, and the Risks
A stock option is a contract that gives you the right, but not the obligation, to buy or sell a … Read more - Foreign Currency (Forex) Trading Explained
Forex — short for “foreign exchange” — is the trading of one country’s currency for another, done purely to profit … Read more - What Is the Law of Diminishing Returns?
The first hour you spend researching a stock teaches you a lot. The tenth hour, researching the same stock, teaches … Read more - Types of Investments: A Beginner’s Overview
Stocks, bonds, mutual funds, real estate, cryptocurrency — if you’re new to investing, the sheer number of options can feel … Read more - What is Investment Liquidity and Why Does it Matter?
Imagine you need $5,000 for a medical bill next week. If that money is sitting in a savings account, you … Read more
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Investing Concepts Explained
What Is Investment Yield?
Yield measures the income an investment produces, as an annual percentage. The simple formula, how it differs from total return, and worked examples for bonds and dividend stocks.
Day Trading Explained
How day trading works, how it differs from swing trading, the FINRA pattern-day-trader rule and $25,000 minimum — and the real risks before you consider it.
The Rule of 72
A quick mental shortcut for estimating how long it takes money to double at a given rate of return — with a doubling table and what it reveals about compounding.
More Investing Guides to Explore
Bond Valuation: How Bonds Are Priced
How a bond’s price is the present value of its future payments — and why prices move opposite to interest rates.
Mutual Funds: Pros and Cons
An honest look at the advantages and drawbacks of mutual funds, from diversification to fees and manager risk.
What Is an IRA? Roth vs. Traditional
How Traditional and Roth IRAs work, how they’re taxed differently, and how to choose between them.
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