By long time periods I meant > 1 day. Maybe for a few hours some algorithm can do it's thing mindlessly, but then some real person will look at holdings with hu

By long time periods I meant > 1 day. Maybe for a few hours some algorithm can do it's thing mindlessly, but then some real person will look at holdings with human judgement and start worrying. But I guess it depends who you think will be doing the marketmaking, and how stupid you think they are.