A lot of this is lead by the energy sector, particularly oil, with oil dropping below $28/barrel for the first time in a while. Thermal coal isn't doing well either. There are some signs of metallurgical coal price recovery, though - that's coal used to make refined metals, such as steel. A recovery there may indicate a pickup of metal commodities markets, which is, in turn, a positive indicator for manufacturing. We'll see.
Regardless, even dipping below support mid-day doesn't mean much; it's not yet a sustained dip. But in all of these cases, we're talking big gaps down at opens - 2.5% - with more following. As it's 1:15AM Cascadian time, I need to go to bed. Things could be exciting tomorrow, if traders in those markets need money to cover losses.