One of the worst stock markets in recent history is equity market of the Mediterranean island country of Cyprus. The Dow Jones Total Stock Market Cyprus Index peaked at 1605.9 in November, 2007. It closed the year 2016 at just 2.95. That is an astonishing plunge of 99.82%.
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Source: Google Finance
Though Cyprus is not a major equity market in the world by any means, it just shows the severity of crashes that can occur. Basically anyone that invested at the peak in 2007 lost almost all of their money. Or to put it another way, someone that invested 10,000 Euros at its peak would now have 18.0 Euros in their account.
- The Worst Bear Market in History, Global Financial Data