Wall Street to install 'circuit breaker' to head off market gyrations
Stock swings of more than 10% in five minutes would trigger trading pause
Stock swings of more than 10% in five minutes would trigger trading pause
Trader attempting to short-sell 16 million shares of S&P 500 stock entered a "b" for billion instead of an "m" for million, sources said
Some sites had trouble handling the volume of visitors looking for information or hoping to make trades