RE:Dow futures down $1255 And since the limit-down move is likely to resume once stocks reopen, here are the threshold triggers for marketwide halts on the cash S&P500:
•If the S&P 500 declines 7%, (208 points), trading will pause for 15 min
•If declines 13%, (386 pts) trading will again pause for 15 mins
•If falls 20%, (594 pts) the markets would close for the day.