No-one sensible tries to sell [or buy] on the last day of the year.....
If someone has a time limit of year-end on having to offload some stock [which is what I suspect] then its free money for short-sellers to hop on the back of it.....
....no consequence for anyone who isn't a forced seller though - though perhaps a present for those inclined to step up and buy in thin markets [depending how much volume there is behind the trivial amounts traded so far].
Am not concerned in the slightest about TA views on SIA by the way, Skyship. It will all unwind soon enough.... ;-)