Dow Trading

As the Dow Jones fall when the big boys to suspend trading? Is there a level or is it case by case basis.

NYSE Rule Rules for Trading Halt the New Year
Topics: Stock
Companies: NYSE Euronext | Merrill Lynch & Co IncBy Reuters | 01 Jan 2008 | 08:42 PM ET Text Size NYSE has established its criteria for trading halts in the case of a steep
market downturn, making only slight changes for the first quarter of the fourth, according to data on the website of NYSE.

For the first quarter, circuit breakers kick in if there is a decline of 1.350 points, or 10 percent, the Dow Jones Industrial Average.

There will be a one hour stop in trading if the drop happens before 2 pm, a 30-minute halt if the decline occurs between 2 pm and 2.30 pm and not stop after 2.30 hours, depending the NYSE.

If the Dow falls 2,700 points or 20 percent, there will be a stop of two hours if it happens before 1 pm, a one-hour halt if the slide occurs between 1 pm and 2 pm; market
stop for the rest of the day if the blade comes after 2 pm

A plunge of 4,000 points or 30 percent - no matter what time it occurs - would result in market being closed for the day. The previous trigger was slightly higher at 4050 points.

This is called Trading curbs ....

If the Dow Jones Industrial Average falls 10%, trading is halted on the NYSE for 60 minutes.

If the Dow Jones Industrial Average falls 20%, trading is halted on the NYSE for two hours.

If the Dow Jones Industrial Average falls 30%, trading is halted on the NYSE for the day.

I just knew he happens twice in my life.
The assassination of JFK and 9 / 11.
It is computerized now and there is a system in place, but I do not know how it works well enough to explain.