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by gricardo99 2609 days ago
Just FYI, NYSE Rule 80B[1] halts trading for 15 minutes, or until the next day if the first 2 levels are breached. CME follows similar rules.

1 - http://wallstreet.cch.com/nyse/rules/nyse-rules/chp_1_3/chp_...

1 comments

Just for fun here's a link to a 2010 flash crash before those rules were in place where a trillion dollars were dropped in half an hour due to algorithms.

https://en.wikipedia.org/wiki/2010_Flash_Crash