Dow Theory

Dow theory is named after the 19th century editor of the Wall Street Journal, Charles Dow. It is often used as an indicator of when a bear market may be about to start.

The idea is that when a downward trend in the Dow Jones Industrial average is confirmed by a downward trend in the Dow Jones Transportation average, firms are no longer shipping goods between each other, which indicates slowing activity and means that a new bear market has begun.

• See Tim Bennett’s video tutorial: What is an index?

MoneyWeek magazine

Latest issue:

Magazine cover
Profit from the agriculture boom

The UK's best-selling financial magazine. Take a FREE trial today.
Claim 3 FREE Issues
Shale gas 'fracking' promises to transform Britain's energy market. Find out what it is, what it means, and how to invest.

More from MoneyWeek

The problem with the Bank of England

Fracking: Nine reasons not to get carried away

Five small-cap stocks worth a flutter

This Dutch company could help us tame floods

ScreenHunter_01 Mar. 25 09.51

Get the latest tips and investment opportunities from MoneyWeek magazine: Claim 3 FREE issues HERE