I would doubt that announcement is the one the trading halt was...

I would doubt that announcement is the one the trading halt was issued for Rio. The trading halt announcement mentions an acquisition, no mention of that in that announcement, and that announcement doesn't even have a price sensitive mark against it. Think it's probably been released on the side and it's just coincidence. As you allude to, I'd seriously doubt they'd consider that a "halt worthy" announcement.

But hey, who knows. If it WAS that I'd be seriously disappointed.....