FinisdomFinisdom
Log inGet access
Intermediate track
IntermediateLesson 24

Drip it in, or all at once?

Drip it in, or all at once?

Investing a lump sum usually wins on average, but spreading it in can feel safer.

In short

Dollar-cost averaging means investing a fixed amount on a schedule. Because markets rise more often than they fall, investing a lump sum all at once usually beats it — but drip-feeding lowers regret.

A large study found that investing a lump sum right away beat spreading it out about two-thirds of the time, simply because markets tend to rise over the long run.[1]

Jumping into a cold pool: all at once is faster and usually fine, but easing in step by step is gentler on the nerves. Both get you swimming.

So why drip in? Because behaviour matters. Spreading purchases protects you from the bad luck of buying everything the day before a drop — and keeps you from panicking.

There’s also a sneaky truth: if you invest each paycheck as it arrives, you’re already dollar-cost averaging. That’s just steady, sensible investing.

Where these numbers come from

Finisdom’s backtester can model steady contributions, so you can compare drip-feeding with a one-time investment over real history.

Next: fees and costs

Check your understanding

Why does lump-sum usually beat spreading money in?

Sources & further reading

  1. 1.Vanguard Research (2012) Dollar-Cost Averaging Just Means Taking Risk Later — Vanguard — Found lump-sum investing beat dollar-cost averaging about two-thirds of the time.

Related

Your time horizonYour brain vs your portfolio

Tripped up by a word? Look it up in the glossary.

Learning only — not investment advice.