The Shale Revolution is a powerful recent example of why America’s system of capitalism is so enduring. We’re not just leaders in shale oil and gas, the U.S. is pretty much the only game in town. One day it will probably be the basis for college courses across the country to illustrate the power of the free market. A year ago OPEC abandoned its efforts to bankrupt the U.S. shale industry through ruinously low crude oil prices. Although it wasn’t well recognized in many other parts of the world, our domestic energy industry was able to harness a long list of advantages:

1) The right geology

2) Existing network of energy infrastructure

3) A highly skilled labor force

4) An entrepreneurial culture

5) Water supplies in the right places

6) Technological excellence

7) Constant drive for productivity improvements

8) Privately owned mineral rights

9) Highly developed capital markets

It’s not the first time the U.S. has used its economic advantages to win a battle. As a result, we are on a path to greater energy security, improved geopolitical flexibility and American Energy Independence. It’s a great story and recounting it to clients is never boring. But where can it go wrong?

Clients often ask, and it’s a fair question, not least because few investors have forgotten the 58.2% drop in the Alerian Index from August 2014-February 2016. The recent distribution cut at Plains All American (PAA) reminds them that the occasional negative surprise remains possible across a landscape of generally rising cash flows and declining leverage.

The most obvious threat is a recession. Energy infrastructure is about moving, processing and storing volumes of hydrocarbons. If economic activity slows, energy consumption of all kinds slows too. Although many pipeline contracts are underwritten by volume commitments from shippers, overall cash flows for the sector would still suffer from less throughput. During the 2008 Financial Crisis MLPs fell along with everything.