Global stocks, bonds, and gold face a triple sell-off: "This is the worst situation; investors have nowhere to hide."

The energy shock sparked by the Iran war is pushing global financial markets into a rare, synchronized multi-asset selloff. Stocks, bonds, and gold all fell together in March; nearly all of the defensive tools in traditional portfolios have failed, leaving investors facing the most severe safe-haven dilemma in recent years.

According to the Financial Times, the MSCI Global Index, which tracks stocks in developed and emerging markets worldwide, is down about 9% in March. In the U.S., the S&P 500 has closed lower for a fifth consecutive week, marking the longest losing streak since 2022, while the Nasdaq 100 has dropped into a correction range over the week.

Meanwhile, a composite measure of global government bonds and corporate bonds is down more than 3%, and the traditional “60-40” stocks-and-bonds portfolio is on track for its worst single month since September 2022. Gold has also slumped 15% this month; under liquidity pressure, investors are being forced to unwind long positions that had previously generated substantial gains.

The market’s core fear is the risk of stagflation. After the outbreak of war in the Middle East, a sharp surge in energy prices has heightened concerns that the global economy could face a stagflation scenario where growth slows while inflation rises at the same time. That has forced central banks, which had originally planned a rate-cut path, to reconsider the possibility of rate hikes—ultimately dealing a blow to all three major mainstream asset classes: stocks, bonds, and gold.

“Nothing is working”: Pressure hits all three asset classes at the same time

What’s rare about this round of selling is that the three categories of assets—stocks, bonds, and gold—are falling in sync, rendering multi-asset diversification strategies nearly ineffective.

In the stock market, the MSCI Global Index for stocks in developed and emerging markets worldwide is down about 9% in March. In the U.S., the S&P 500 has closed lower for a fifth consecutive week, setting a record for the longest losing streak since 2022, while the Nasdaq 100 has fallen into a correction range over the week.

In the bond market, the yield on the 10-year U.S. Treasury jumped as high as 4.48% at one point, the highest level since July; the 30-year yield has also hovered near 5%. European bond yields similarly reached the highs seen since the outbreak of the conflict. The bond selloff is not merely reflecting rising inflation expectations; it more strongly signals that the market is repricing the policy paths of the world’s major central banks.

Gold’s collapse has been even more surprising. Gold had posted a strong rally over the past two years, reaching a peak in January this year, but it is down 15% this month. Sophie Huynh, a multi-asset portfolio manager at BNP Paribas Asset Management, said that because investors have “nowhere to hide,” they are “selling gold and other high-yield assets” to meet liquidity needs.

Tikehau Capital’s head of capital markets strategy, Raphaël Thuin, said bluntly: “What works for investors? Nothing. This is truly one of the worst scenarios you can imagine. In the past few weeks, managing investment portfolios has been extremely difficult.”

Trump’s remarks fail to stem the bleeding, and market confidence cracks

Trump extended the final deadline for attacks on Iran’s energy infrastructure, but the statement failed to calm investor sentiment. The S&P 500 fell another 1.7% on Friday, extending the slide from the previous trading day (the worst single day since the outbreak of the conflict); over two days, the cumulative decline was the largest since last year’s tariff turmoil.

Jordan Rochester, head of fixed income strategy at Mizuho, said the deadline extension “did not solve the problem that has been building up day by day with the Strait of Hormuz blockade,” adding, “the market may start to reduce its focus on verbal pressure from the White House and instead concentrate more on the reality of actual energy shortages on the ground.”

U.S. Secretary of State Marco Rubio predicted that the war would end in “weeks rather than months,” but the market barely reacted. Larry Weiss, head of equity trading at Instinet, said:

“A few weeks ago, news like this would have pushed the market sharply higher, but today there’s no reaction. Nobody knows what happens next, and there’s an inherent lack of trust in the statements from both the U.S. government and Iran.”

Federated Hermes’ deputy chief investment officer of equities, Steve Chiavarone, also noted: “Earlier, Trump used his rhetoric to steady the oil and bond markets. The market had been waiting for the conflict to end, but today it’s no longer responding to that.”

Defense tools fail, and diversification logic faces a challenge

This crisis is not only a market pullback, but also a profound test of the multi-asset diversification investment framework of the past several decades.

Explaining in a report to clients, the founder of Tallbacken Capital Advisors, Michael Purves, said: A trader who had perfect foresight on February 27 (the day before the conflict broke out)—and who bought bonds, gold, VIX call options, and S&P 500 protective options ahead of time—would now be sitting in losses across almost all positions.

Research by Bloomberg Intelligence ETF analyst Athanasios Psarofagis shows that this year, on trading days when stocks fell, the probability that bonds and gold rose together was only about 43%. For Bitcoin, the probability was even lower—only about 25%—both far below the levels of more than 60% seen a decade ago.

Christian Mueller-Glissmann, head of asset allocation strategy at Goldman Sachs, said that in the early stage of an inflation shock, the “only tools that could work” are derivatives that bet on inflation rising or commodity prices increasing. His team shifted to an overweight position in cash one week after the conflict broke out.

A recent Bank of America survey of fund managers showed that in March, investors rushed into cash at the fastest pace since the COVID-19 pandemic.

Even though the current situation is severe, some market participants believe the persistence of this trend depends on how the conflict unfolds.

Michael Arone, chief investment strategist at State Street Global Advisors, said the failure of the fixed-income diversification function may be temporary. His team has recently reduced equity exposure, increased holdings of bonds, and expects that once tensions between the U.S. and Iran begin to ease and inflation risks fade, the bond market will return to rate-cut logic.

However, Schroders’ Mina Krishnan warned that the market environment has undergone a deeper, structural shift: “The world has moved from a demand-side shock to a supply-side shock, and the old investment playbook needs revision.” Her team bought protection through credit default swaps before the outbreak of the Middle East conflict and continues to hold it.

Tikehau Capital’s Raphaël Thuin pointed directly to the core contradiction: “The traditional concept of safe-haven assets is increasingly being challenged. As global economic and financial markets keep evolving, this narrative has become more complex.”