Correlation or decorrelation between goods and services prices and asset prices?
In the long term, goods and services prices and asset prices are normally expected to move in parallel: at equilibrium, the relative prices of assets and goods and services are normally stable. This stability can be achieved through wealth effects: when wealth increases as a result of rising asset prices, demand for goods and services is stimulated, and this drives up goods and services prices. But in practice, this mechanism is too weak and there is a decorrelation between asset prices and goods and services prices. So what is the dynamics? Goods and services prices continue to rise very slowly, which also keeps interest rates low; Asset prices rise sharply, driven by expansionary monetary policies, and then "bubbles" burst when excessively high relative asset prices push down demand for assets: the renewed correlation between goods and asset prices is achieved through a periodic fall in asset prices, not through a rise in asset prices.