It is almost inconceivable for a commodity to go parabolic. Lentinman, if that is the case, how would you describe the late 70s spikes in the Gold and Silver charts? <A HREF="http://www.mrci.com/pdf/metals.pdf" target="_blank">http://www.mrci.com/pdf/metals.pdf</A> Every one of these charts shows parabolic spikes at various points in history. Copper appears to be in the midst of a parabolic run at present.