The stock exchange halted trading to prevent things from getting really out of control.
Soon after trading began in Vienna, the stock exchange was suspended after stocks instantly fell 10 percent.
The theory behind the French stock exchange figures is that in this environment, investors prefer more cautious management.
Note: In the United States, the two largest stock exchanges are the New York Stock Exchange and NASDAQ. Activity on these two exchanges is usually considered an indication of the state of the economy as a whole.