Between 2008 and 2021, the world's major central banks have over$15 trillionof fresh money injected into the financial system. The Federal Reserve alone has increased its total assets tenfold from $700 billion to over $7 trillion. What began as an emergency measure became the new normal — with consequences that most investors are only now beginning to feel.
This article analyzes the mechanisms behind quantitative easing, calculates five science-based inflation scenarios and shows how this monetary policy affects different asset classes. The data comes from an academic analysis of 50 years of market data.
Quantitative Easing: Anatomy of an Experiment
Quantitative easing - QE for short - describes the process in which central banks buy government bonds and other securities in order to increase the money supply and reduce interest rates. What the Federal Reserve began after the 2008 financial crisis has now reached historic proportions.
The Federal Reserve's total assets:From $700 billion in 2008, it rose to $4.5 trillion by 2015 (QE1-QE3), before exploding to over $7 trillion starting in 2020 after a brief pause. This corresponds to a tenfold increase in just 12 years.
The European Central Bank followed with its own programs: The Asset Purchase Program (APP), Targeted Longer-Term Refinancing Operations (TLTRO) and the Pandemic Emergency Purchase Program (PEPP) pumped trillions more into the European markets. Together with the Bank of Japan and the Bank of England, a global experiment without historical precedent emerged.
The crucial point: This money doesn't just disappear. It circulates in the financial system and finds its way — if not into the shopping cart, then into asset prices.
The quantity theory: M Ã V = Y Ã P
The classic quantity theory of economics describes the connection between the money supply and the price level with an elegant formula:M Ã V = Y Ã P. The money supply (M) multiplied by the velocity of circulation (V) results in the gross domestic product (Y) multiplied by the price level (P).
What happens if M increases massively? Theoretically, either Y (real growth) must rise, P (prices) must rise — or V (velocity of circulation) must fall. Exactly the latter happened initially: the velocity of money in circulation fell to historic lows. This temporarily slowed consumer price inflation.
But the equation has an expiration date. If V returns to historical normals — which is likely given an economic recovery — then the massively expanded money supply M will find its way into prices. The question is not if, but when and how strong.
The hidden inflation:While official basket prices remained moderate, assets exploded: stocks, real estate, cryptocurrencies, art. This asset price inflation is not captured in any official CPI index — but is at least as relevant for investors with real purchasing power.
Five inflation scenarios: From 5.06% to 8.21%
How high will inflation actually be? Instead of a single forecast, academic analyzes have calculated five independent scenarios that combine different methodological approaches:
Scenario 1 — Polleit model: 5.77% p.a.Based on Professor Thorsten Polleit's monetarist analysis, which models the connection between monetary expansion and lagged price effects. This scenario takes into account the historical lag structure between money creation and the effect of inflation.
Scenario 2 — Schnabl model: 5.50% p.a.Professor Gunther Schnabl from the University of Leipzig analyzes the cumulative effect of low interest rate policy on the real economy. His model particularly takes into account the zombification of companies and the resulting loss of productivity.
Scenario 3 — ShadowStats methodology: 6.46% p.a.John Williams' alternative inflation calculation uses the 1990 U.S. market basket — before methodological adjustments systematically depressed official inflation. According to this methodology, actual inflation is already well above the official figures.
Scenario 4 — 70s Germany: 5.06% p.a.A historical comparison with the inflation phase of the 1970s in the Federal Republic. Back then, oil price shocks and expansionary fiscal policy led to a sustained phase of inflation — a scenario that has striking parallels to the situation today.
Scenario 5 — 70s USA: 8.21% p.a.The aggressive scenario is based on the US inflation experience of the 1970s under Fed Chairman Arthur Burns. Stagflation, oil embargoes and fiscal policy excesses drove inflation to over 14% — an extreme scenario that cannot be ruled out.
The average of these five independent scenarios gives an expected inflation of~6.20% p.a.— a value that has dramatic consequences for every investor: at 6% inflation, the purchasing power of a portfolio is halved in just 12 years.
Seigniorage: The invisible limit of money creation
Is there a natural limit to quantitative easing? The answer lies in the concept of seigniorage capital — the theoretical maximum amount of money a central bank can create without destroying trust in the currency.
The formula is:S = (GNP Ã g) / i, where S represents the seigniorage capital, GNP the gross national product, g the growth rate and i the interest rate. For the Eurozone, this results in an estimated seigniorage capital of approx9.5 trillion euros.
The critical tipping point is reached when the cumulative national debt exceeds the seigniorage capital. At this point, there is a risk of a loss of trust that is self-reinforcing: Investors are selling government bonds, interest rates are rising, refinancing costs are exploding - a vicious circle that no central bank can anymore control.
Several Eurozone states are already moving into a zone where debt levels are dangerously close to this theoretical limit. This makes the question of portfolio positioning not academic, but rather existential.
Asset price inflation vs. consumer price inflation
Perhaps the most important insight from the QE era:Inflation manifests itself where money arrives first.Economists call this the Cantillon effect, named after the Irish-French economist Richard Cantillon (1680-1734).
When the central bank buys bonds, the money goes first to banks and institutional investors — the initial recipients. They invest it in stocks, real estate and other assets before it reaches the real economy and consumer prices. The result: a massive redistribution from bottom to top.
Since 2008, US stocks (S&P 500) have risen by over 400%, real estate prices in many metropolises by 50-100%, and Bitcoin from zero to over $60,000 at times. At the same time, wages are stagnating in real terms and savings are being devalued by zero interest rates. Inflation has been here for a long time — it just hits different asset classes at different times.
For investors this means: If you only look at the official consumer price index, you are missing the big picture. The relevant question is not whether inflation will come — but where it will strike next.
Implications for portfolio construction
What does $15 trillion in QE and expected inflation of 6.2% p.a. mean for specific portfolio allocation? The data from 50 years of market history provides clear information:
Material assets become indispensable.In each of the five inflation scenarios, real assets — gold, commodities, inflation-linked bonds — perform significantly better than nominal bonds. A portfolio that holds 50% real assets (25% gold + 25% commodities) has historically produced a return of 6% inflation12.02%— significantly above the inflation rate. Find out more in our article about thisGold as a portfolio building block.
Nominal bonds become a risk.When inflation rises, fixed coupon bonds lose value in real terms. The only exception: TIPS (Treasury Inflation-Protected Securities), whose coupon is linked to inflation. The traditional 60/40 approach — 60% stocks, 40% bonds — no longer works in an inflationary environment.
Countercyclical positioning pays off.Monetary policy has distorted different asset classes differently. US stocks are expensive on a CAPE basis (over 30), while commodities and emerging markets are historically cheap. Those who invest countercyclically in the cheapest asset classes will achieve the best returns in the long term. Find out more aboutcountercyclical investing with CAPE signals.
Diversify across scenarios, not just asset classes.The uncertainty about the exact path of inflation requires a portfolio that works in both deflation and inflation scenarios. This requires building blocks such as gold (works in both scenarios), TIPS (inflation protection) and selective equity allocation (favorably valued markets).
Conclusion: The $15 Trillion Question
Quantitative easing was the largest monetary policy experiment in human history. $15 trillion of new money in a system that cannot absorb that amount through real growth. The Quantity Theory has not been abolished — it has just been delayed.
For investors, the question is not whether the consequences will occur, but rather how to prepare for them. The data from five independent inflation scenarios show: An average inflation of 6.2% p.a. is a realistic base scenario. Anyone who sets up their portfolio today as it did in the 2010s - with an overweight in US stocks and nominal bonds - risks a gradual but substantial loss of purchasing power.
The alternative: A data-based, scenario-optimized asset allocation that focuses on real assets, countercyclical signals and real diversification. Not as speculation on the future — but as rational preparation for various possible futures.