Comment by _wmd

Because there is nowhere(?) you can trade those shares right now, and if those places do exist, the local price almost certainly already reflects this news. Tomorrow morning, the new information will also influence the opening auction, and retail trades haven't a mission of catching any of the action

You might find on Monday the price tends upwards slightly for most of the day, which seems typical of this kind of news, but really, all the value of this deal is captured by existing shareholders -- who is going to sell you their shares at a cut price?