The Dow tumbled 175 points at the open today, following even bigger selloffs in overseas markets, the Wall Street Journal reports. The S&P and Nasdaq each fell 2.2%. Those drops followed a whopping 5.8% dive on China’s Shanghai Composite Index, a 3.1% drop for Japan’s Nikkei, and 2% falls for the UK’s FTSE and Germany’s DAX. Freefalling commodity prices drove the negativity, with multiple Chinese metal companies taking the maximum 10% hits. (More Dow Jones stories.)