Markets are put on lock down after a certain sell point for a given session. I believe the current sell off point is 12% of overall value (could be less). It is not based on weekly or yearly percentages. That was created to avoid a market crash. Basically, you can't trade.

__________________

An unwavering defender of those I see worth protecting.

"promote the general welfare, not provide the general welfare"

We the People of the United States, in Order to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defence, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity, do ordain and establish this Constitution for the United States of America.