A shift toward a more restrictive monetary stance among several major central banks may signal that policymakers are placing renewed emphasis on controlling inflation, a trend that could reduce liquidity support for global equity markets, according to Barclays analysts.
Over the past week, a number of leading central banks delivered policy decisions shaped in part by inflation concerns linked to the conflict involving Iran and its impact on energy markets.
The European Central Bank led the move by raising interest rates for the first time since 2023. The Bank of Japan followed with an increase that lifted borrowing costs to their highest level since 1995. Both institutions pointed to the inflationary risks associated with energy market disruptions caused by the closure of the Strait of Hormuz and the potential for those pressures to spread more broadly through the economy.
The U.S. Federal Reserve left rates unchanged, but policymakers adopted a firmer tone. Nine Fed officials now expect at least one rate increase before the end of the year, compared with none in projections released in March. Markets also noted that the first policy statement issued under Chair Kevin Warsh highlighted the goal of achieving “price stability” while omitting any reference to maximum employment, a traditional component of the Fed’s dual mandate.
Meanwhile, the Bank of England maintained interest rates but continued to display a hawkish bias despite softer inflation and labour market figures, Barclays noted.
Monetary Tailwinds for Stocks May Be Fading
Barclays strategist Emmanuel Cau and colleagues argued that recent developments represent “a clear shift in the global monetary policy backdrop.”
They said: “After a prolonged period of synchronized rate cuts across the Western world, the tailwind from monetary policy easing is behind us. At the same time, uncertainty around the reaction function of central banks, particularly the balance between growth and inflation risks, may contribute to higher bond market volatility.”
According to the bank, a more aggressive tightening cycle—particularly from the Federal Reserve—could have meaningful consequences for financial markets.
The analysts warned that if the Fed were to move “more decisively” toward prioritising inflation and begin tightening policy again, “it would start to squeeze liquidity and weaken a key pillar of support that has underpinned bullish equity market returns over the past two years.”
Although Barclays stressed that this is not its “base case,” it remains “a risk to monitor.”
Iran Agreement Eases Some Market Concerns
The analysts noted that the interim peace agreement between the United States and Iran has provided “a welcome relief” to investors.
Lower geopolitical tensions have helped drive oil prices down, reducing some of the inflation concerns that had weighed on markets during the conflict.
Attention is now focused on the reopening of the Strait of Hormuz, one of the world’s most important energy shipping routes. Before the conflict, the waterway handled roughly one-fifth of global oil and liquefied natural gas flows.
Recent data suggests shipping activity is gradually recovering, although some market observers believe it may take time before traffic returns to pre-conflict levels.
Europe Could Benefit From Improving Conditions
Barclays believes a more favourable macroeconomic backdrop during the second half of the year could support regions that have lagged global markets in 2026.
The analysts said: “From a regional perspective, the potentially better macro outlook for [the second half] should be supportive of [year-to-date] laggards such as Europe, leading us [to] close our underweight on the region, particularly with positioning still skewed toward a tech/semis-heavy United States.”
They added: “At the sector level, as lower oil prices boost consumer confidence from the lows, the risk-reward for some consumer cyclicals, most notably for luxury, should improve even after their recent short squeeze led bounce.”