[alexmingoia]

Are you referring to automated trading? How can someone sell without assessing whether they want to sell? Isn't that a contradiction?

For example, if a grocery store is normally open, and I go there to buy groceries only to found out they're closed... I still need groceries. I would just be forced to wait until they're open or go get them from somewhere else. With that reasoning, I would expect halting trades to encourage capital flight to exchanges with liquidity and predictable operation. People prefer to shop at grocery stores that have predictable hours and stocked shelves.