NEW YORK ( TheStreet) -- Got a chance to sit down with TheStreet's Jim Cramer and discuss gas prices, now up more than 50 cents in the last month alone. What is causing this unprecedented rise?Many of the most repeated arguments I hear just don't wash for me, including reduced Saudi supply and a shutting down of East Coast refineries previously owned by Hess ( HES) and ConocoPhillips ( COP). What does make sense to me is the strong increase in speculative positions in gasoline, now at a greater number than at any time in that contract's history, even going back to the major spike in oil prices in 2007. This is a theme I wrote about extensively in my book "Oil's Endless Bid," now resurrected in the gasoline market. The last time retail gas prices hovered near $4 a gallon, crude prices were $20 higher; the time before that, crude was almost $40 higher than it is selling for now. This is the clearest indication that speculators have added a strong premium into the price of gasoline even before we go into the demand-hungry summer. Gasoline is a very hot trade right now, akin to shorting the Japanese yen, but far more destructive to the consumer. Have a look at the video I taped with Jim for more. Follow @dan_dicker This article was written by an independent contributor, separate from TheStreet's regular news coverage.