This was a suspension not a halt. I've watched (not been in) at least a hundred of these over the years.
Suspension decisions are made at the Commissioners' level -- the very top. Like other government bureaucracies, the SEC moves very slow. Someone spent a lot of time gathering information and convincing seniors trading should be suspended. There's no incentive to fast-track contrary info up the same chain on a little pinkie so soon afterwards that would make him and others look bad internally.
----- "We simply attempt to be fearful when others are greedy and to be greedy only when others are fearful." -- Warren Buffett
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