Rainer Michael Preiss – Global Markets Commentary
May 2026
Executive Summary
For decades, portfolio construction for private clients revolved around a simple formula: 60% equities and 40% bonds. The framework worked because stocks generated growth while bonds provided income and diversification during periods of stress.
Yet the world that made the classic 60/40 portfolio successful may no longer exist in the same way.
The post-pandemic era, structurally higher inflation, geopolitical fragmentation, fiscal expansion, concentration risk in mega-cap equities, and changing bond dynamics are forcing investors to rethink portfolio construction.
The question is no longer: 'What percentage should I hold in stocks and bonds?' but 'What risks and return drivers am I truly exposed to?'
Why the Traditional 60/40 Worked
Historically, equities delivered long-term growth while bonds generated income and diversification. Bonds often rallied during equity downturns, helping stabilize portfolios.
Why the Formula Is Being Challenged
2022 demonstrated that both stocks and bonds can fall simultaneously when inflation rises and correlations change.
Beyond Asset Labels: Think in Risk Factors
Investors increasingly think about exposure to growth, inflation, interest rates, liquidity, geopolitics and investor psychology—not merely asset labels.
Concentration Risk Has Quietly Increased
Many broad indices have become concentrated in a small number of mega-cap technology firms, creating hidden risks.
The Rise of Total Portfolio Thinking
Leading institutions increasingly begin with objectives and desired outcomes rather than traditional asset buckets.
Conclusion
The death of 60/40 may be overstated, but its unquestioned dominance is increasingly challenged. Future portfolios may emphasize adaptability and resilience.
Disclaimer: This commentary is for informational and educational purposes only and does not constitute investment advice.
Rainer Michael Preiss, Partner & Portfolio Strategist, Das Family Office, Singapore
