Two ways to invest money
- Dollar-cost averaging (DCA): invest a fixed amount on a schedule, such as $500 every month.
- Lump sum: invest the whole amount now.
What history shows
Because markets rise more often than they fall, lump-sum investing has beaten spreading the same money over 6 to 12 months in roughly two-thirds of historical periods, in studies by Vanguard and others. Money waiting in cash usually misses growth.
Why DCA is still popular
- Most people invest from each paycheck, so they are doing DCA anyway.
- Regret. Investing everything the day before a crash is painful. DCA reduces that risk and helps people actually start.
- Buying more when prices are low. A fixed amount buys more shares when prices fall.
A practical rule
If you have a lump sum and can handle a drop right after investing, invest it. If fear would stop you, set a short DCA schedule, three to six months, and automate it so emotion cannot pause it. See Hype and market sentiment.
See also
- Compound interest How compound interest and compound returns work, the formula, the rule of 72, and why starting early matters more than investing large amounts later.
- Index funds What index funds are, why low-cost index investing beats most professional fund managers over time, and how to use index funds as a portfolio core.
- Staying invested through downturns Why missing the market's best days is so costly, why the best days cluster near the worst, and practical ways to stay invested when markets fall.
- Hype and market sentiment How hype, headlines and crowd emotion move stock prices away from fundamentals, and simple habits that keep your decisions grounded in the business.
Pages that link here: Investing FAQ
Last updated September 30, 2026. Education only, not investment advice.