11.   Rumors about a major announcement involving Internet giant Yahoo! Inc. caused the Nasdaq Stock Market to halt trading in Yahoo moments after it opened Wednesday.

12.   Stocks were moderately lower Friday after trading resumed on the New York Stock Exchange after computer problems caused exchange officials to halt trading.

13.   The Chicago Board Options Exchange halted trading in options of NYSE-listed stocks shortly after the New York exchange announced its halt.

14.   The revelations have sent the prices of Bre-X at the Toronto stock market tumbling, forcing the bourse to temporarily halt trading in the shares.