The current situation in the US stock market is that there are many hidden dangers. For example, one danger is commercial real estate. Most of the funding for commercial real estate mortgages comes from various banks in the United States. However, the latest survey shows that the default rate on mortgage agreements has actually risen to eleven percent. Simply stating the number may not convey much, but what if I told you that the default rate for commercial real estate has already exceeded the default rate during the 2008 subprime mortgage crisis? Doesn’t that sound surprising? The situation is that severe, and this is just regarding commercial real estate. Another significant danger is shale oil, which we will discuss later.