A ton of people have been calling that lower high in the S&P and Dow in December as a selling point but I don't think anybody believed them especially on the first day of the year 2016 (after December). Many of them are the same folks giving their economic analysis via saying the top was in place around May but that little rebound in the fall kind'uv quiet things down for a little bit.
Yet, I don't remember anyone predicting the impact of China as a catalyst because most were concentrating on the FED and Oil as the catalyst.