Factor Momentum and the Momentum Factor

53 Pages Posted: 7 Aug 2017 Last revised: 8 Feb 2019

See all articles by Sina Ehsani

Sina Ehsani

Saint Xavier University

Juhani T. Linnainmaa

USC Marshall School of Business; National Bureau of Economic Research (NBER)

Multiple version iconThere are 2 versions of this paper

Date Written: February 5, 2019

Abstract

Momentum in individual stock returns emanates from momentum in factor returns. Most factors are positively autocorrelated: the average factor earns a monthly return of 2 basis points following a year of losses and 52 basis points following a positive year. Factor momentum explains all forms of individual stock momentum. Stock momentum strategies indirectly time factors: they profit when the factors remain autocorrelated, and crash when these autocorrelations break down. Our key result is that momentum is not a distinct risk factor; it aggregates the autocorrelations found in all other factors.

Keywords: Anomalies; Autocorrelation; Factors; Momentum

JEL Classification: G11; G12; G40

Suggested Citation

Ehsani, Sina and Linnainmaa, Juhani T., Factor Momentum and the Momentum Factor (February 5, 2019). Available at SSRN: https://ssrn.com/abstract=3014521 or http://dx.doi.org/10.2139/ssrn.3014521

Sina Ehsani (Contact Author)

Saint Xavier University ( email )

Chicago, IL 60655
United States

Juhani T. Linnainmaa

USC Marshall School of Business ( email )

Marshall School of Business
Los Angeles, CA 90089
United States

National Bureau of Economic Research (NBER) ( email )

1050 Massachusetts Avenue
Cambridge, MA 02138
United States

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