Behavioural Finance 

Why momentum works

Chris Dillow

Chris Dillow

Perhaps the strongest deviation from the simplest textbook theory of market efficiency is the success of momentum investing. For example, my no-thought momentum portfolio (comprising the 20 biggest rising stocks in the previous 12 months) has outperformed the FTSE 350 by 9.1 percentage points a year over the last 10 years. This, of course, is no mere quirk. Good returns on momentum strategies were first spotted in US stocks by Sheridan Titman and Narasimhan Jegadeesh in 2001 and since then have been discovered in international markets as well as in commodities and currencies.

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