The Dow Jones Transportation Average is on a historic tear. Here are 6 charts you need to see.

The Dow Jones Transportation Average, seen as a proxy for the health of the U.S. economy, has been on a historic run lately following a protracted period of subpar returns.

​The Dow Jones Transportation Average, seen as a proxy for the health of the U.S. economy, has been on a historic run lately following a protracted period of subpar returns.