New evidence of quarterly return patterns in the Spanish stock market

Abstract

This article updates the evidence found by Ortiz et al. (2010) in the Spanish stock market. Our results provide a lack of significant return anomalies around the first three quarter ends of the year, which questions the role of window dressing in these return patterns. Nevertheless, the results confirm a significant turn-of-the-year effect for small-cap stocks with poor return records, which may be consistent with the tax-loss selling hypothesis despite the wash sales regulation. Using a new approach, we find that this January effect is a widespread sector anomaly. Finally, the turn-of-the-year anomaly definitively exceeds the first trading days for the small-cap stocks.