Those US residents who dumped for tax filing reasons yesterday are probably buying back now it's lunch time on January the 2nd in the USA.
That makes no sense. Last year was a huge run up so you would not sell at the end of the year but sell this year if you want to defer paying taxes on it in the short term but even that isnt the most efficient. US taxpayer best case is long term capital gains which is 366 days from purchase so end of year or not doesnt matter.
I don't understand the US tax system. It sounds so complicated I suspect most Americans don't fully understand it either. My speculation was based on a comment someone else made.