- Today’s economy is being reshaped by powerful supply-driven forces that make inflation more unpredictable and traditional diversification less reliable.
- As bonds stop behaving like dependable hedges, investors are discovering that many long-held portfolio assumptions no longer hold.
- This blog explains how to adapt to this new regime and position portfolios for a world defined by structural change rather than familiar cycles.
For decades, investors learned to think about the economy in a familiar and predictable way. Growth fluctuated, and inflation remained relatively stable. Today, the world operates quite differently. The shocks that move markets no longer look like the ones investors were trained to understand. They come from supply, not only demand. They create inflation that behaves in unpredictable ways and forces policymakers into difficult choices. They make traditional diversification weaker, not stronger.
We entered this environment gradually, then all at once. Crises like the pandemic broke supply chains; the war in Ukraine forced countries to rethink energy dependence. Tariffs returned as an accepted tool of statecraft, demographics shifted, and geopolitics fragmented. Technology began altering capital flows at a speed that surprised even the optimists.
The old environment did not disappear. It was replaced, which is the heart of the supply shock economy. It’s a structural evolution.
A World With Sticky and Spiky Inflation
If inflation today feels strange, it’s because it behaves in ways investors are not used to. It doesn’t trend steadily upward. It doesn’t fall in a smooth line. It doesn’t settle where policymakers want it. Instead, inflation bumps along at levels that are neither comforting nor alarming. It dips, stalls, and then rises again.
This stickiness has a cause: Supply constraints, regional shifts in trade, labor shortages, and pricing power all feed into a pattern of inflation that is uneven rather than trending. It is not soaring, but it is not falling cleanly either. It has what HSBC Asset Management’s Global Chief Strategist Joe Little described as a “spiky” character. Small shocks create outsized effects, and minor disruptions take longer to unwind. Costs become embedded faster.
A world with sticky and spiky inflation is fundamentally different from one with gently drifting prices. It introduces uncertainty into the foundation of portfolio construction. Because inflation sits at the base of every valuation, every discount rate, every risk model, its unpredictability reverberates through the investment ecosystem.
The most important consequence may be psychological. Investors have stopped asking whether inflation will fall back to 2 percent. They ask whether 2 percent is even relevant anymore, as targets that once felt like gravity now feel like mere suggestions.
The Policy Trap
Central banks rarely admit when the world has changed, but you can see it in their actions. When inflation comes from supply shocks, cutting rates does not magically fix the problem. At the same time, keeping rates high risks slowing growth. This creates the dilemma at the core of today’s policy regime.
The Federal Reserve can’t support growth and control prices with the same moves. Each choice has consequences. Lower rates may fuel demand and asset prices, but they can also make inflation stubborn. Higher rates may calm price pressures, but they can weaken the parts of the economy that remain sensitive to borrowing costs.
This tension didn’t exist for most of the last twenty years. Now it sits at the center of every policy decision.
The result is more volatility around expectations. Markets are forced to reprice policy paths every time new data arrives. This back-and-forth creates sharp reversals in both the equity and bond markets. It creates rallies that overshoot and corrections that feel abrupt, and it makes investors feel like the ground beneath them is shifting even when economic conditions haven’t changed much.
Policy no longer feels like a steady hand. For many across the globe, it feels like another source of uncertainty.
The Reverse Conundrum
One of the clearest signs that the world has changed is happening in bond markets. Short-term rates are falling as central banks ease policy, yet long-term yields are not following suit. In many cases, they stay elevated or even rise.
This is quite unusual. Historically, when policymakers cut rates, the entire yield curve moves lower. Today, the opposite happens. The curve steepens, long bonds refuse to rally, and term premiums rise. It looks like the bond market is sending a different message from the policymakers who set the short end.
This “reverse conundrum” reflects deeper forces.
Investors see debt levels rising in large economies. They see fiscal commitments that are difficult to unwind. They see structural deficits that do not shrink with growth, and they see funding needs climbing year after year. In that environment, it is harder for long-duration assets to behave like safe havens.
When the long bond stops acting like a reliable hedge, the logic behind traditional diversification weakens. Duration becomes less about protection and more about valuation. Bond portfolios become vulnerable to forces that are not directly tied to interest rate cycles, and investors are forced to accept that the simplest tool for risk management no longer works the way it used to.
The Weakening of Traditional Diversification
The erosion of the stock-bond relationship is one of the more important shifts in modern portfolios. For years, bonds have cushioned equity drawdowns almost automatically. If stocks fell, yields dropped and bond prices rose. This allowed investors to own aggressive risk assets with less fear of loss. The bond market absorbed some of the shock.
That relationship is no longer consistent. A supply shock world produces inflation that can rise even when growth slows. It creates policy uncertainty that affects both asset classes simultaneously and produces valuations that move together rather than apart.
The rise in positive stock-bond correlation reflects this development. When both sides of the portfolio respond to the same forces, diversification loses its power. Investors must work harder to find resilience and must diversify the diversifiers.
This is the structural challenge of the next decade. It is not simply that returns may be lower or volatility may be higher. It is that the foundational relationships investors rely on are no longer stable.
What about US Exceptionalism?
The United States outperformed the rest of the world by a wide margin for decades. Strong earnings, a powerful tech sector, and a steady economy all contributed to a narrative of American exceptionalism. Markets rewarded that narrative with valuations that reflected confidence in structural outperformance.
Now the picture appears to be shifting. The US economy remains relatively strong, but growth outside the US is picking up. Europe looks more stable than it has in years, while Asia is supported by targeted fiscal policy and renewed manufacturing investment. After a difficult stretch, China is showing signs of a more balanced recovery. Emerging markets demonstrate a level of strength that surprises many investors who still think in outdated stereotypes.
Profits outside the US are positioned to grow faster. Policy support is more visible. Demographic advantages in parts of Asia and Latin America create favorable long-term conditions, and currencies in many emerging economies may still be very undervalued.
This broadening of global growth challenges the assumption that the US must always lead. It opens up more paths for investors, and it reduces the need to rely solely on a narrow set of assets for returns.
The old pattern of synchronized global cycles is giving way to a world where different regions move on their own timetables. That creates opportunities for diversification at the geographic level, even when traditional asset class diversification becomes more challenging.
The Rise of Emerging Market Resilience
Perhaps the most underappreciated development is the growing maturity of emerging markets. Many have established stronger policy frameworks, deeper domestic investor bases, and more flexible currency regimes. They are less vulnerable to external shocks, and they rely less on foreign capital. They manage inflation with more credibility.
This does not mean emerging markets are risk-free. But it does mean the nature of the risk has changed. Volatility is lower, and sensitivity to Federal Reserve policy is lower. Dependency on commodity cycles is lower, while correlations with developed markets are lower.
Because investors need independent sources of return, this matters. Emerging markets may no longer be the fragile beta trade they once were. They may become one of the few places where structural improvements align with attractive valuations and favorable long-term growth.
This is a big change. It reflects the multipolar world we now inhabit, and it suggests that investors who view emerging markets through the lens of the past may miss some of the more critical changes happening today.
Building a Portfolio for the Supply Shock Era
If the world has changed this much, how should portfolios change with it? Here are some principles that matter most.
1. Accept inflation volatility as part of the landscape.
Trying to predict inflation precisely is less important than building portfolios that can withstand a range of outcomes.
2. Reduce reliance on duration as the primary hedge.
Long bonds may still have value, but they cannot carry the full burden of portfolio protection.
3. Add return streams that behave independently.
Inconsistent inflation, policy volatility, and rising term premiums all reward strategies that thrive on diversification of drivers rather than diversification of exposures.
4. Look globally for growth rather than assuming it will concentrate in one region.
The next decade is unlikely to mirror the last. Broadening is a real theme.
5. Reevaluate emerging markets on their own terms.
Many have outgrown the vulnerabilities they were defined by 20 years ago.
6. Build for a range of possible futures rather than one central scenario.
The defining feature of the supply shock economy is uncertainty. Resilience comes from expanding the distribution of outcomes a portfolio can survive.
This New Era Requires New Assumptions
The world investors now face is not inherently more dangerous than the world that came before it. As always, it has simply evolved. The drivers of economic cycles have shifted. Policy reactions have changed, and inflation is behaving in unfamiliar ways. Bonds are responding to new forces. Global growth is more balanced. Emerging markets are more resilient.
In this environment, one big challenge is not that investors take too much risk. It’s that they cling to assumptions built for a world that no longer exists. The supply shock economy rewards humility but punishes rigidity. It offers opportunities to those willing to adapt.
Portfolios built on yesterday’s rules will struggle, while portfolios built on today’s reality will thrive.
This is based on an episode of Top Traders Unplugged, a bi-weekly podcast with the most interesting and experienced investors, economists, traders and thought leaders in the world. Sign up for our Newsletteror subscribe on your preferred podcast platformso that you don't miss out on future episodes.










































