Interaction between investor sentiment, limits to arbitrage and the returns of stock market anomalies: evidence from the UK stock market

This study investigates the role of two prominent concepts in finance: limits to arbitrage and investor sentiment in stock prices. The study examines how changes in market-wide investor sentiment and limits to arbitrage can affect the performance of nine UK stock market anomalies. The extant literature relating to investor sentiment focuses mainly on the US stock market, whilst research on the UK market typically examines aggregated index-level data. In addition, previous studies have focused on examining investor sentiment and limits to arbitrage separately. Using data from UK-listed companies over the period January 1997 to December 2019, the study finds that five stock market anomalies were related to changes in UK investor sentiment and produced significantly higher returns following periods of high investor sentiment, while the effect of limits to arbitrage was mostly limited. However, the interaction analysis provided support to the limits to arbitrage theory and demonstrated that the effect of high investor sentiment on stock market anomalies was more pronounced when combined with high limits to arbitrage and had less effect during periods characterised by low limits to arbitrage.