Oil: Why nobody knows how low it will go By: CNBC.com News January 14, 2015 at 07:47 AM EST The oil price plunge has defied all but the most pessimistic analysts. We take a look at some of the difficulties in calling the bottom. Read More >> Related Stocks: Citigroup Deutsche Bank Ag Goldman Sachs Group Morgan Stanley iPath Dow Jones-Goldman Sachs Crude Oil Fund