A gas pump displays prices at a Shell service station on February 19, 2013 in Tustin, California.
A gas pump displays prices at a Shell service station on February 19, 2013 in Tustin, California. - 

The average price of a gallon of regular unleaded gasoline is up again this morning to $3.78, according to AAA’s Daily Fuel Gauge Report. Chris Low, chief economist with FTN Financial, joins Marketplace Morning Report host Jeremy Hobson to explain what's causing the price spike and its impact on buying.

Follow Jeremy Hobson at @jeremyhobson