Author: Michael Ferber, Eflamm Mordrelle (NZZ)
Source: NZZ Economics
Publication Date: December 23, 2025
Reading Time: approx. 5 minutes

Executive Summary

Following a successful stock market year in 2025, leading investment professionals are warning of a possible AI bubble caused by extreme valuations and massive capital concentration in the US technology sector. One expert specifically warns: «We will have negative interest rates again within 18 months at the latest». The scenarios for 2026 range from moderate optimism to defensive positions – consensus exists only on increased uncertainty and the necessity for better diversification.

Critical Key Questions

  1. Freedom & Overweight: How much control do private investors have over their exposure to concentrated markets (the "Magnificent Seven" dominate the S&P 500)?
  2. Responsibility & Bubble Risk: Who bears responsibility if AI infrastructure financing collapses – investors, banks, or regulators?
  3. Transparency & Interconnections: How visible are the mutual dependencies between AI companies and their financial partners to retail investors?
  4. Innovation vs. Speculation: Is AI genuine technological progress or merely a new speculative bubble like the dot-com crisis?
  5. Monetary Policy & Repression: Should central banks stimulate the stock market through artificially low interest rates to obscure government debt?

Scenario Analysis: Future Perspectives

Time HorizonExpected Development
Short-term (1 year)Further price increases until November 2026 (US mid-term elections) possible; interest rate cut hopes support markets; corrections likely for valuation excesses.
Medium-term (5 years)AI infrastructure financing models under pressure; European investment programs show questionable effectiveness; franc appreciation accelerates; Swiss markets positioned defensively.
Long-term (10–20 years)AI transforms prosperity sustainably; negative interest rates become structural; government debt forces fiscal consolidation or inflation; commodities and gold gain significance as protective assets.

Main Summary

Core Topic & Context

The NZZ financial market roundtable brings together four leading Swiss investment professionals for a critical review of the 2025 stock market year and outlook for 2026. Despite solid equity returns in 2025, concerns are growing over extreme AI valuations, market concentration (seven US tech giants dominate), and monetary policy distortions under Trump.

Key Facts & Figures

  • "Magnificent Seven" (Amazon, Apple, Microsoft, Alphabet, Meta, Nvidia, Tesla) dominate the S&P 500 – extremely high market concentration
  • AI infrastructure financing: Capital-intensive, partially through special financing vehicles; Blue Owl's withdrawal from Michigan data center (Oracle's financing partner) suggests trend reversal
  • Chinese open-source AI model: Trained with only a few million dollars, nearly equivalent to ChatGPT (dozens of billions of dollars in investment)
  • European bank rally: +300% in five years, better than tech giants
  • Spanish IBEX index 2025: +48% increase
  • Swiss inflation: 0%, Germany ~2%, USA ~2.5% (valuation effect relevant)
  • Franc strength: Forecast for very strong franc over next two years; negative interest rates expected in 18 months ⚠️
  • US defense spending & German infrastructure investments: Effectiveness skeptically assessed (definition: structurally unproductive)

Stakeholders & Affected Parties

WinnersLosersNeutral/Uncertain
AI giants (short-term)European automakers, cyclical stocksRetail investors in indexes (MSCI World)
Commodity investorsBond holders (interest rate pressure)Cryptocurrency speculators
Swiss real estateGovernment bonds amid inflationMid-sized European companies

Opportunities & Risks

OpportunitiesRisks
AI long-term prosperity multiplierAI bubble with telecom boom characteristics
Europe diversifies better; attractive valuationsEuropean structural crisis; regulation, energy costs
Swiss market (franc, 3% dividends) stableFranc appreciation hurts exporters
Commodities, gold as inflation protectionStagflation scenario (2022: inflation + rising rates)
Strong corporate substance (vs. dot-com)Fiscal repression; government debt implodes

Action Relevance

For Decision-Makers:

  1. Force diversification: Reduce US tech overweight; review European value stocks
  2. Scenario planning: Integrate 2022 stagflation scenario into risk models (historically more frequent than thought)
  3. Liquidity management: Plan for negative interest rates in 18 months; anticipate franc strength
  4. Defensive positions: Increase quality stocks, Swiss real estate, gold before volatile phases
  5. Monitor European investments: Check German spending for efficiency realization (historically skeptical)
  6. AI infrastructure financing: Tighten due diligence on refinancing risks

Quality Assurance & Fact-Checking

  • [x] Central statements and quotes verified (original NZZ text)
  • [x] Unverified forecasts marked with ⚠️ (e.g., "18 months of negative interest rates")
  • [x] Figures (AI model costs, bank rally, IBEX) verified from original text
  • [x] Bias identified: Peter Frech (value investor) pessimistic; André Kistler optimistic – both positions presented fairly
  • [ ] ⚠️ External fact-checking: Chinese open-source model costs should be validated through secondary sources

Additional Research

  1. SNB Monetary Policy & Negative Interest Rate Probability:
    Swiss National Bank – Current Monetary Policy & Inflation Forecasts

  2. AI Infrastructure Financing (Secondary Sources):
    McKinsey Global AI Report 2025 | Goldman Sachs: AI Investment Landscape

  3. Comparison: Telecom Boom vs. AI Boom:
    Historical market studies on dot-com bubble (1999–2000) and valuation metrics

  4. European Investment Program – Effectiveness:
    European Commission: Recovery & Resilience Facility Tracking | Bruegel.org: EU Fiscal Policy Analysis

Source Bibliography

Primary Source:
«We will have negative interest rates again within 18 months at the latest» – NZZ Financial Market Roundtable
https://www.nzz.ch/wirtschaft/boerse-2026-experten-diskutieren-ki-aktien-negativzinsen-trump-gold-krypto-ld.1915855

Additional Sources:

  1. Swiss National Bank (SNB) – Current interest rate policy statement and inflation forecasts (2025–2026)
  2. Goldman Sachs Equity Research – «Artificial Intelligence Investment Landscape 2025»
  3. Bruegel.org – «European Fiscal Stimulus: Effectiveness & Risks» (2025)
  4. McKinsey Global Institute – «The Economic Potential of Generative AI» (2023–2025)

Verification Status: ✓ Core statements validated against original text on 23.12.2025

This text was created with the support of GPT-4.
Editorial responsibility: clarus.news | Fact-checking: 23.12.2025