Iran War Upends Bond Playbook Forcing Fed Re-evaluation

Investors betting on central bank rate hikes to combat war-driven inflation may be misreading a global growth shock that could force policymakers to hold fire.

(Bloomberg) — Bond investors dusting off their 2022 playbook are selling sovereign debt on the assumption that the war in Iran will force central banks to raise interest rates to fight inflation, a move that may overestimate policymakers’ appetite for tightening in the face of a significant growth shock. While Brent crude has surged 2.7% to over $108 a barrel, the conflict’s hit to global growth may stay the Federal Reserve’s hand, challenging the market’s initial reaction.

"Investors might be overestimating the odds that central banks will raise rates in response to the war," Brij Khurana, a fixed income portfolio manager at Wellington Management, wrote in a commentary. "Hits to economic growth caused by commodity supply shocks may make central banks reluctant to hike rates, even amid elevated inflation."

The macroeconomic backdrop is starkly different from the post-Ukraine invasion period. The U.S. economy saw net job losses in the six months preceding the conflict, and households have largely depleted the more than $2 trillion in pandemic-era savings. Despite the selloff in bonds, which pushed the 10-year Treasury yield two basis points higher to 4.32%, other assets are already flashing warning signs, with S&P 500 futures recently slipping 0.2% from record highs.

The core tension for bond markets is now a structural conflict between two opposing forces: a war-induced global growth slowdown arguing for lower yields, and a surge in deficit-financed military spending that points to higher yields. The key question, according to Khurana, is whether the dominant effect of the war is higher inflation or weaker growth. Markets have so far leaned toward the former, but if the latter proves more important, a major repricing is ahead.

A Different Kind of Shock

Central bank monetary policy is an ill-suited tool for the current supply-side disruption. Rate hikes can cool demand-driven inflation, but they are ineffective when higher input costs force companies to cut production and lay off workers. With households already concerned about job security due to disruptions from artificial intelligence, the risk is that they will increase precautionary savings, further slowing economic growth. In this environment of weakening consumer activity, it is unlikely that central bankers’ greatest fear—that inflation expectations will become unanchored—will materialize.

“Even if we do get a deal, oil is not going back to pre-war levels,” wrote Mohit Kumar, chief economist for Europe at Jefferies. “We need to factor in some degree of stagflationary impact.”

The Rising Cost of Conflict

A new reality shaping fiscal policy is the changing economics of modern warfare. The conflict has demonstrated that low-cost drone technologies can neutralize traditional military advantages, making capital like tanks, ships, and aircraft more vulnerable and depreciate faster. This dynamic is forcing a costly rethink of defense strategy and spending.

This is already being reflected in fiscal policy. The U.S. Congress is considering a $1.5 trillion defense budget proposal, while Europe is embarking on a multiyear plan to increase military spending. China is expected to follow a similar path. For the world’s largest bond markets—the U.S., Europe, China, and Japan—this introduces sustained upward pressure on yields as governments are forced to finance higher military spending through deficits.

Emerging Markets May Offer Refuge

In this complex environment, the article suggests that smaller developed markets and emerging markets could offer more attractive opportunities for bond investors. Without global hegemonic ambitions, these countries are less likely to pursue costly military buildups and can focus on less expensive defensive capabilities. As a result, their bond markets are more likely to respond to global growth dynamics rather than the persistent, debt-funded fiscal expansion facing major powers. This could lead to a significant shift in capital flows if the market pivots from pricing in inflation to pricing in a growth slowdown.

This article is for informational purposes only and does not constitute investment advice.