7% 15 min, 13% otros 15 min, 20% hasta el día siguiente.
Un ejemplo:
The first level gets triggered if the S&P falls 7 percent between the opening of trading hours at 9:30 a.m. in New York and 3:25 p.m. (or 12:25 p.m. on days when the stock market has a scheduled early close).
The next trigger, level 2, kicks in when the index falls 13 percent, another 15-minute halt. To get there on Monday, the S&P would have to fall to 2,403.
Level 1 and 2 halts can only happen once per trading day. If the S&P fell 20 percent (that would be to 2,209 as of Friday), trading would stop for the rest of the day.