> I think it is OK to have trading halts for particular situations. Sure, but that's not what I'm referring to: Anytime a stock drop by a given percentage, it

> I think it is OK to have trading halts for particular situations. Sure, but that's not what I'm referring to: Anytime a stock drop by a given percentage, it is halted. Also, if the market drops by a percentage, the entire market is halted. If those happen to be part of a larger coupled drop, then the US market would have the same problems opening that the Chinese market is having: Everyone waits for the open, tries sell all at once, re-invokes the halt, and repeat.