Pension Sandpile

The Cascade Begins
High Correlation
Inflation Creates Massive Pension Problems
Broken Promises
Cleveland, Houston, Dallas, Denver, and Tulsa

Sandpiles can be fun. Nothing beats taking kids to the beach (or being a kid!) and watching their creativity blossom into all kinds of magical shapes. The problem with sand construction is it doesn’t last. I have it on good authority that building your house on the sand probably won’t end well.

The same holds for financial sandpiles. I described in a 2006 letter (and rerun many times since then) scientists using computer-simulated sandpiles to study complex systems. The piles can grow quite large and then suddenly collapse with a single added grain of sand.

The point at which this happens is unpredictable. That it will happen is highly predictable. From that 2006 letter…

“So, we end up in a critical state of what Paul McCulley calls a ‘stable disequilibrium.’ We have players all over the world tied inextricably together in a vast dance through equities, debt, derivatives, trade, globalization, international business, and finance. Each player works hard to maximize their personal outcome and reduce their exposure to fingers of instability.

“But the longer the game runs, says Minsky, the more likely it is to end in a violent avalanche, as the fingers of instability have more time to build, and, eventually, the state of stable disequilibrium goes critical.”

The stable disequilibrium of that time did, in fact, go critical a couple of years later. The sandpile collapsed but reconstruction (with ample stimulus) began almost immediately. Now we have a new and even bigger sandpile.