1, Those at the Nasdaq who monitor trading will decide whether to suspend trading case by case, Peterson said.

2, The regulator has had to step in three times during the past fortnight to suspend trading on both Moscow's exchanges.

3, On ChiNext's opening day, share prices on the SZSE grew so quickly that regulators were forced to suspend trading, fearing dangerous inflation of stock.

4, In morning trading, CIT shares fell 44 cents, or 61 percent, to 28 cents. The New York Stock Exchange said it would suspend trading in CIT prior to Tuesday's market open.

5, Steep declines forced officials in Russia and Indonesia to suspend trading indefinitely.

6, Heavy selling led exchanges in Austria, Russia and Indonesia to suspend trading, and the losses on Australia's markets caused traders to call it "Black Friday."

7, " He proposes that the US Securities and Exchange Commission require that all markets incorporate a "circuit-breaker" which would suspend trading on signs of an algorithm-driven crash.