What trucking tells us about the economy

Sky-high freight rates are falling, pinching truckers' income. And that tells an important story about what's going on in the economy overall.

Why it matters: Nearly every good consumed in the U.S. is put on a truck at some point. Right now, there are hints of a slowdown in demand.

Meanwhile, supply has been stabilizing as a flood of new truckers entered the industry to cash in on the ultra-lucrative boom that sent paychecks soaring.