RE:CIBC, Morgan Stanley & Goldman Sachs These markets are very illiquid. They use algorithms to push the price where they want it. At some point the sell program ends, and they cover/go long and run it in the other direction.
Volume is very low in all markets in August, so the short energy sell program can have a bif effect on the share prices. Energy is very shorted, so at some point a recovery will happen.
Hard to say if today is the beginning.