Is the theory of portfolio choice (rebalancing) confirmed in the long term?
The theory of portfolio choice (or portfolio rebalancing) implies that, in the long term, the proportions of different assets in wealth are stable, i.e. asset prices (bonds, equities, real estate, etc.) follow the increase in the money supply (this is the M2 money held by non-bank economic agents, not central bank money). We seek to determine whether this theory is relevant in the cases of the United States and the euro zone. We see: In the United States, at various horizons, a significant link between an increase in the money supply and a rise in asset prices; In the euro zone, above all a significant link between money supply and real estate prices.