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Demystifying Time-Series Momentum Strategies: Volatility Estimators, Trading Rules and Pairwise Correlations

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Title: Demystifying Time-Series Momentum Strategies: Volatility Estimators, Trading Rules and Pairwise Correlations
Authors: Baltas, N
Kosowski, R
Item Type: Working Paper
Abstract: Motivated by studies of the impact of frictions on asset prices, we examine the effect of key components of time-series momentum strategies on their turnover and performance from 1974 until 2013. We show that more efficient volatility estimation and price trend detection significantly reduce portfolio turnover and therefore rebalancing costs. The poor performance of time-series momentum strategies during the post-2008 period is explained by an increased level of pairwise correlations. We propose a novel correlation-based leverage-adjustment to the strategy's weighting scheme and show that it improves performance by safeguarding against tail risk, even after accounting for realistic transaction costs.
Issue Date: 12-Oct-2015
URI: http://hdl.handle.net/10044/1/41472
DOI: https://dx.doi.org/10.2139/ssrn.2140091
Publisher: SSRN
Copyright Statement: © The Authors
Open Access location: http://papers.ssrn.com/sol3/papers.cfm?abstract_id=2140091
Appears in Collections:Imperial College Business School