There has been much talk recently about economic problems in key economies around the world. Early Wednesday morning, for example, I spoke on Bloomberg Surveillance about the situation in China. Before I went on air, Bloomberg News was covering multiple stories on the decline in bond yields and its effect on the U.S. economy, weakness in the German economy, and so on. I then realized how closely this issue is linked to the protests in Hong Kong.It has been about 10 years since the last U.S. recession, and we would expect to see another one soon. Since the United States is the worldâs leading importer, an American recession always leads to a weakening of the global economy.