We're in the same situation as before the NICE announcement - the whole market knows there is an announcement on the way and everybody is in with the intention of selling on the spike following the announcement. We've all seen this before where the actual announcement results in a short spike with a big sell-off then driving the SP down, mostly to lower levels than before the announcement.
The problem we have now (which we didn't have pre-NICE) is that the SP hasn't moved and sits at 1.40 - 1.50.