Stock market co-movement, domestic economic policy and the macroeconomic trilemma: the case of the UK (1922–2016)

This article explores the global cycle hypothesis by testing whether the US stock market serves as an explanatory variable for the evolution of expansions and contractions in the UK stock market from 1922 until 2016. Alternatively, it tests an index that groups the stock markets of advanced economies to identify whether this driving force is international. Second, regarding co-movement with the US, the article explores whether its time-varying nature is contingent on the domestic and international economic policy regimes. I find evidence that there is a strong and contemporaneous co-movement between the US and UK stock markets. Additionally, through a VAR model, I identify that the movements in the UK stock market cause, in the Granger sense, changes in the index for advanced economies up to two years later. Furthermore, in the short-run co-movement between the US and UK stock markets is contingent on the macroeconomic trilemma while, in the long run, both domestic and international policy regimes affect the relationship. A final contribution is the design of a new methodology for describing the evolution of financial time series as risk-adjusted above or below average returns to different time horizons: the Local Bull Bear Indicators (LBBIs).