Can oil fall all the way to $40? By: CNBC.com News November 30, 2014 at 21:28 PM EST As oil prices hit more than four-year lows, analysts are slashing forecasts, with some predicting a plunge of as much as 40 percent to $40 a barrel. Read More >> Related Stocks: Canadian Natural Resources Limited Goldman Sachs Group iPath Dow Jones-Goldman Sachs Crude Oil Fund