Janice it looks like your right that a buyout of Knight is being explored. I'm not a big fan myself( I'll keep my reasons to myslf as they are purely speculative on my part.) However I don't want to see stockholders hurt worse than they already are and or employees losing their jobs.
I suspect if they can hold on that Vanguard,TD Ameritrade,E*trade etc. will slowly start using them again.