The thousands of companies listed by the New York Stock Exchange and Nasdaq Stock Market will pause for 15 minutes if the Standard & Poor’s 500 Index plunges 7 percent before 3:25 p.m. New York time. The benchmark got close earlier, falling as much as 5.3 percent.
Market-wide circuit breakers were installed after the 1987 crash to prevent losses from snowballing. The levels that trigger a halt have varied over the years, with a rule changein 2013 lowering the threshold to 7 percent .... http://www.bloomberg.com
