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.
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Related Practical Help
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Banking — Savings accounts, CDs, money markets, and how banking connects to investing
Taxes — Capital gains, retirement account taxation, and how investing affects your tax bill
Saving Money — Building the cash cushion you need before investing
Money Basics — Foundational guides on banking, budgeting, credit, and personal finance terms
Financial Topics — The full library of money help and financial education on MoneyInstructor
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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