Purpose – The purpose of this paper is to suggest a superior method for assessing mean stationarity of asset pricing effects. Design/methodology/approach – The authors suggest the use of an F-test to examine mean stationarity of asset pricing effects across subperiods. The superiority of...

Purpose – The purpose of this paper is to suggest a superior method for assessing mean stationarity of asset pricing effects. Design/methodology/approach – The authors suggest the use of an F-test to examine mean stationarity of asset pricing effects across subperiods. The superiority of...

Research documents higher stock returns in November through April than for the rest of the year. This anomaly is known as the "Halloween effect" and results in the following trading rule: sell stocks in early May, invest in T-bills, and re-invest in stocks on Halloween. In contrast to recent...

Purpose – The purpose of this paper is to suggest a superior method for assessing mean stationarity of asset pricing effects. Design/methodology/approach – The authors suggest the use of an F ‐test to examine mean stationarity of asset pricing effects across subperiods. The superiority of...