Ranking Going Down - There is any Google update?

My rankings have stayed the same but all my traffic has disappeared. I have had the best two days since I started the site six months ago and sold almost $5,000 worth of goods as an Amazon affiliate since Monday and today is a ghost town. I always get more traffic before an update and one keyword I always ch CK disappears during the update to page 4 or five. This morning it dissapeared again

I don't think anything major happened. Yeah, lost a few positions from last wednesday but now slowly climbing back.

In my case, for a site that's been hit hard by the December update (from 10k to 2k pageviews/day), I'm seeing roughly the same traffic as after it was hit (2k/day) but somehow a few money pages have shifted, leading to a bit more revenue fortunately.

It's a slight improvement in my case.