"If you build it, he will come" ~ Field Of Dreams
Demand begets supply. Supply then fuels demand. Probably the most simplistic way to look at the economic cycle.
In 2009 at the depths of the economic recession in the absence of demand store shelves were bare. Retailers were risk averse and would buy only what they knew they could sell. Then customers began to trickle back in. As confidence grew retailers began to expand their inventory.
Rather than carry three of one item perhaps they carry five as their ability to sell those items grew. With this growth in sales they hired staff. That staff shops and spends money. Those business hire. The cycle catches on and the inventory build process begins. It is self sustaining. As long as their is growth there is demand.
On the other end of the cycle when growth slows so does demand. As demand falls sales fall and the retailer prefers to now hold just three of that item versus the original five. The inventory cycle eventually goes into contraction as retailers buy less this year than what they bought last. Pretty simple, non technical explanation.
So where are we in the US economic cycle? Let's take a look at inventory growth since the depths of the "great" recession.
Inventory And GDP
The inventory build cycle was the "recovery." Just look at the following chart showing the GDP contribution from inventory versus total GDP. Without the massive build there was no recovery. Now look at the drop inventory growth and the resulting fall in GDP.
Inventory VS Retail Sales
Notice how retail sales growth has all but disappeared the past few months yet inventory growth has not. This inventory build cannot continue without a pick up in retail sales. At a minimum inventory growth needs to scale back to stay at the pace of sales growth.
Inventory Composition
Notice the trends within manufacturers, wholesale and retail inventory levels. Retail growth is slowing. That will force a slowdown in the other two categories. In fact September wholesale inventory contracted for the first time since November 2010.
Bottom Line
With retail sales flat and labor still depressed the traditional transition mechanism has failed. The "if you build it he will come" concept has failed to spark growth. Supply failed to fuel further demand. What should have been a normal transition into real growth has failed.
The shelves are full and the risk appetite of retailers in the face of this reality is declining. The inventory build cycle has ended and that gives birth to recession.