ETFs (Exchange-Traded Funds)
One ticker that holds a whole basket of assets, tradable like a stock — the workhorse of modern diversified investing.
What You're BuyingBeginner 5 min read· Lesson 3 of 13 in Investing Fundamentals
How they work
An ETF holds a basket (an index, a sector, bonds, commodities) and trades on an exchange all day like a stock. A creation/redemption mechanism with institutions keeps its market price glued to the value of the basket, so you get diversification with stock-like convenience.
Why they dominate
Low expense ratios (often under 0.1% for broad index ETFs), intraday tradability, tax efficiency, and instant diversification. For most investors, a broad-market ETF is the sensible default holding against which every fancier idea should be judged.
Watch-outs
Not all ETFs are cheap and broad — leveraged, inverse, and niche thematic ETFs carry high fees and decay effects. Read what the ticker actually holds; the three letters tell you nothing.