For years, nobody seemed particularly concerned about inflation. Outside of a few blips, in the wake of the financial crisis, people have become accustomed to low inflation, and central banks providing ample stimulus to the economy. But suddenly that's changing. There seem to be hints that the macro backdrop is shifting, and that has investors on edge. So why the shift and what's going on? On this week's Odd Lots, we speak with Michael Ashton of Enduring Investments, a specialist in analyzing the inflation data, and helping clients trade on it. He offers his theory of what drives inflation, and where it's going to go next.