Japan has endeavored to develop its capital Tokyo as one of the top global financial centers for a long time. In 2014, the Tokyo Metropolitan Government presented new initiatives as part of the sustainable economic growth strategies by taking advantage of the global attention given to the 2020...

Models of “contagion” rely on market imperfections to explain why adverse shocks in one asset market might be associated with asset sales in many unrelated markets. This paper demonstrates that contagion can be explained with basic portfolio theory without recourse to market imperfections....