Behind the rise of the U.S. subprime mortgage problem and the surge in crude oil and materials prices observed until this summer, there were global high growth and expansion in financial leverage. Of course, there were some voices warning about the situation.
However, given that the economy was in a favorable condition, it was difficult to accept such warnings as is often the case given the nature of human beings and society. The world economy is now undergoing a process of adjustment of various excesses that had been accumulated, to achieve more sustainable growth.