AGNC dropped until just under 28.50, then stopped dropping and maintained a pretty flat level. It looks almost like a post-SPO support to my neophyte eyes. That's a 12.5% discount to book. I wouldn't be surprised if that was AGNC's first buy. At 28.50 they could purchase 17.5 million shares, but who knows, they might drop their buying price to get shares even cheaper.