“The benchmark price for most diesel surcharges fell the most in a week since the early days of the 2009 financial crisis, with physical markets suggesting there are further declines to come. 

Not since October 2009 has the Department of Energy/Energy Information Administration weekly diesel price fallen as much as the 17.4 cents it dropped Monday. The price came in at $4.967 a gallon, the first time it has been below $5 since Oct. 3.”