Market declines sparked by the Iran war are morphing into a full-blown rout across Wall Street.
Efforts to broker an end to the fighting and restart the flow of Middle East oil produced only further escalation, which in turn fuelled an ever-greater sense of dread in markets. The Nasdaq 100 fell 1.9% on Friday alone and sank into correction; the S&P 500 slipped for a fifth week, capping its longest losing streak since 2022; bonds fell, pushing the benchmark 30-year yield towards 5%; and Bitcoin is at about half its pre-war peak.
Selling snowballed in the week’s final session, capping the biggest two-day slide in the S&P 500 since last year’s tariff dramas. Concern about the war’s impact on spending pushed consumer-discretionary shares down 3%, the worst drop in five months. Financial stocks, which had held up for most of the last two weeks, dropped 2.5%, while the Cboe Volatility Index surpassed 30, the highest in almost a year.
Almost everywhere investors now look, the picture is bleak: Oil’s flirting around $110; inflation expectations are climbing; central bankers who just recently were mapping out rate-cut plans are now contemplating hikes; and equities are grinding through their worst month in more than three years.
Making matters worse for investors, almost nothing in their standard defensive toolkit has worked to stall the declines. At least three of the four asset classes at the core of a diversified portfolio have fallen in unison for four straight weeks, matching the longest such stretch since May 2022.
On Friday, the US and Israel bombed nuclear targets and steel facilities in Iran, and President Donald Trump pushed back a deadline for Iran to agree to reopen the Strait of Hormuz or face strikes on its power plants. Markets kept falling, in sharp contrast from Monday, when Trump’s walk-back on his threat to bomb Iran’s energy infrastructure sparked a rebound across assets.
“Trump had jawboned both the oil and bond markets into staying calm, waiting for the conflict to end,” said Steve Chiavarone, deputy CIO of equities at Federated Hermes. “The market isn’t responding to that today.”
For a fifth time, investors offloaded risk heading into the weekend. Losses spread even after Trump’s secretary of state, Marco Rubio, predicted the war would take “weeks not months” to win.
“A couple of weeks ago the market would have popped on that headline, but there was no reaction today,” said Larry Weiss, head of equity trading at Instinet. “No one knows the next steps, and there’s an inherent distrust regarding the statements made by both the administration and the Iranians.”
Pain for diversification-minded investors has been building for years. But the war has provided a vivid proof that bonds, gold, volatility trades and cryptocurrency can all misfire at once — across a military escalation, a US-China trade flap and a hawkish central bank repricing.
Michael Purves, founder of Tallbacken Capital Advisors, put it in stark terms in a note to clients this week. An investor with perfect foresight on February 27, the day before the attacks began — who loaded up on bonds, gold, VIX calls and S&P 500 protective options — would today be sitting on losses in virtually every position.
“It was a perfect storm of having a bunch of the wrong tools, each failing for specific reasons,” Purves said in an interview. “There are no obvious silver bullets when there are this many unknowns.”
The reasons are complex. The bond selloff has been driven not only by rising inflation expectations but also by a repricing of what central banks intend to do next, a shift playing out from Washington to Frankfurt to Tokyo. Gold is different. The structural case — central bank buying, dollar diversification, fiscal deterioration — remains intact, but the metal ran too far too fast ahead of the crisis. Rising inflation-adjusted yields have compounded the damage.
Ten-year Treasury yields have jumped, poised for the largest monthly increase since October 2024. An ETF tracking the popular diversification trade known as risk parity has lost 8%. And products specifically engineered to protect equity portfolios through volatility — strategies investors pay a premium for precisely because they are supposed to make money when markets fall — have performed in line with the index they exist to protect.
The implication is uncomfortable but increasingly difficult to avoid: the next time markets fall — whether because this war escalates, or some new crisis arises — investors may find that the tools they relied on for a generation offer less protection than they assumed.
“The world has moved from demand-side shocks to supply-side shocks and old playbooks need to be revised,” said Mina Krishnan of Schroders. Her team had bought protection through credit default swaps prior to the Middle-East conflict, and continued to hold onto them.
Amid the dearth of havens, investors are rushing to cash even if that means missed opportunities should markets rebound. And for those willing to cope with complexity, there are structured notes and quant trades designed to offer downside protections or returns uncorrelated to market performance.
To be sure, the efficacy of diversification is commonly assessed over years and decades, not a few weeks. And a simple stock-bond portfolio delivered decent returns in 2025 and during the first two months of this year.
The futility of diversifying through fixed income is likely temporary, according to Michael Arone, chief investment strategist at State Street Investment Management who had positioned for lower rates and called the latest spike in yields “egg on my face.” His team recently reduced equity exposure and raised holdings in bonds. Once US-Iran tensions start to ease, he says, fading inflation risk will allow the bond market to return its focus on lower rates, setting the stage for buffering any equity losses should growth angst recur.
“The war has interrupted the trend, but it hasn’t changed the overall structure,” he said. “If in fact this conflict is measured in weeks and months, and not quarters or years, you could easily see oil back in the $75 to $85 a barrel range reasonably quickly.”
