Investors are betting oil will bounce back

According to an article in Forbes (12 Mar 15): "Comparing units outstanding versus one week ago at the coverage universe of ETFs at ETF Channel, the biggest inflow was seen in the ProShares Ultra Bloomberg Crude Oil (UCO), which added 14,300,000 units, or a 13.2% increase week over week."

My 2c:  While there is short term downside risk, oil is more than likely to see a price recovery over the long term.  There is a limited supply of oil and no legitimate replacement for oil despite all the fanfare about clean energy.