The Post‐Cost Profitability of Momentum Trading Strategies: Further Evidence from the UK

Sam Agyei‐Ampomah
Authors registered in the RePEc Author Service: Sam Agyei-Ampomah

European Financial Management, 2007, vol. 13, issue 4, 776-802

Abstract: This paper examines the post‐cost profitability of momentum trading strategies in the UK over the period 1988–2003 and provides direct evidence on stock concentration, turnover and trading cost associated with the strategy. We find that after factoring out transaction costs the profitability of the momentum strategy disappears for shorter horizons but remains for longer horizons. Indeed, for ranking and holding periods up to 6‐months, profitable momentum returns would not be available to most average investors as the cost of implementation outweighs the possible returns. However, we find post‐cost profitability for ranking and/or holding periods beyond 6 months as portfolio turnover and its associated cost reduces. We find similar results for a sub‐sample of relatively large and liquid stocks.

Date: 2007
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