As much as I would like to say that they are in trading halt because the announcement is positive. They would also be obliged to call a halt if the results were negative and they wanted to avoid a leak until they had analysed the results.
So all the halt means is (I expect) that they have started unblinded the data, started doing the stats and need time to look at the results. They are making sure there is no leak.
Good luck everyone.
G
