Wolfgang Köhler (born 1947), a qualified business graduate, has been familiar with the topics of economics and finance as well as the crises of the system for many years. In the "Wirtschaftswoche" he analyzed the background and consequences of the stock market crash of 1987. He later headed the "Money + Capital" department there. In the 1990s he reported on banks and stock markets, mishaps and bankruptcies for "DIE ZEIT". As a stock market columnist he warned his readers early on about the madness of the Internet stock market boom. Today Köhler lives and works as a freelance journalist in Düsseldorf.