Is it the Weather? Comment

Posted: 19 Dec 2008 Last revised: 26 Jan 2009

See all articles by Mark J. Kamstra

Mark J. Kamstra

York University - Schulich School of Business; Rady School of Management

Lisa A. Kramer

University of Toronto - Rotman School of Management

Maurice D. Levi

University of British Columbia (UBC) - Sauder School of Business

Date Written: September 11, 2008

Abstract

This comment discusses some errors in a recent paper by Jacobsen and Marquering [Jacobsen, B., Marquering, W., 2008. Is it the weather? Journal of Banking and Finance 32 (4), 526-540], in which the authors challenge our previous finding that stock market returns exhibit seasonal patterns consistent with the influence of seasonal affective disorder on investor risk aversion. We find that we cannot replicate the authors' findings, even after corresponding with them. Furthermore, we document several problems with their methodology, including misspecification of their economic model, misspecification of their econometric model, and use of inappropriate data. While we agree that seasonal affective disorder is not an explanation for all variation in equity markets, we do maintain that careful analysis leads to economically and statistically significant evidence of the effect we originally documented.

Keywords: Seasonal affective disorder, SAD, Sell in May, Stock market cycles, Return seasonality

JEL Classification: G10, G11, G12

Suggested Citation

Kamstra, Mark J. and Kramer, Lisa A. and Levi, Maurice David, Is it the Weather? Comment (September 11, 2008). Journal of Banking and Finance, Forthcoming; Rotman School of Management Working Paper No. 1317939. Available at SSRN: https://ssrn.com/abstract=1317939

Mark J. Kamstra

York University - Schulich School of Business ( email )

4700 Keele Street
Toronto, Ontario M3J 1P3
Canada

Rady School of Management ( email )

9500 Gilman Drive
Rady School of Management
La Jolla, CA 92093
United States

Lisa A. Kramer (Contact Author)

University of Toronto - Rotman School of Management ( email )

105 St. George Street
Toronto, Ontario M5S 3E6 M5S1S4
Canada
416-978-2496 (Phone)
416-971-3048 (Fax)

HOME PAGE: http://www.chass.utoronto.ca/~lkramer

Maurice David Levi

University of British Columbia (UBC) - Sauder School of Business ( email )

2053 Main Mall
Henry Angus 865
Vancouver BC V6T 1Z2
Canada
604-822-8260 (Phone)
604-822-8521 (Fax)

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