Stock Markets June 26, 2026 08:11 AM

Barclays Says Summer Volatility May Persist as Fed September Hike Odds Climb

Bank flags rotation away from momentum winners as real rates and the dollar tighten conditions, while lower oil prices may cap further hawkish repricing

By Caleb Monroe
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Barclays warns that equity markets could face a volatile summer as rising real interest rates and a stronger dollar drive investors away from the year-to-date momentum winners. The bank notes that falling oil prices might blunt how aggressively markets reprice policy expectations. Barclays highlights an uncertain Federal Reserve reaction function under new chair Warsh and says a September rate hike now looks more likely, though it is not the economists' base case.

Barclays Says Summer Volatility May Persist as Fed September Hike Odds Climb
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Key Points

  • Barclays warns rising real rates and a stronger dollar are prompting a rotation away from this year’s momentum winners, increasing the risk of a volatile summer in equities.
  • A September Fed rate hike appears more likely according to Barclays’ note, though it is not the bank economists' base case; the Fed's reaction function under Chair Warsh remains unclear.
  • Micron’s strong results reassure banks that AI demand for semiconductors is robust, encouraging a "buy the dip" approach in the sector, while falling oil prices may limit further aggressive hawkish repricing.

Barclays has flagged the prospect of heightened market turbulence this summer as rising real rates and a firmer dollar prompt investors to rotate out of this year’s top performers. The bank also said that a decline in oil prices may place some limit on further hawkish repricing.

In a client note, analyst Emmanuel Cau said markets are still adjusting to what he called a "new Fed reality" after a hawkish reading of the first meeting under Federal Reserve Chair Warsh. Barclays observed that real rates have broken out of their year-to-date range while the dollar has strengthened, both developments that are tightening financial conditions and encouraging risk-off behavior across equity markets.

Cau wrote that "with a September Fed hike looking more likely now (although not our economists' base case), but a still unclear Fed's reaction function under new chair Warsh, volatility could remain high during summer." The bank's commentary emphasizes the potential for continued swings while investors reassess monetary policy expectations.

Barclays highlighted the market rotation by pointing to selling pressure on this year’s momentum winners. Stocks in technology, AI and commodity-linked sectors "have seen some profit taking in recent days," the bank said, while previously lagging groups - chiefly defensives and quality names - "finally caught a bid."

The bank cautioned that the broader transition away from global easing is a risk for equities in the second half of the year, noting that investors may increasingly question whether central banks will step in to support markets amid still-high inflation and resilient growth.

On the semiconductor front, Barclays pointed to strong results from Micron as evidence that AI-driven demand remains robust. The bank suggested that such reassurance makes investors "likely to stay in buy the Semis dip mode," signaling continued buying interest on weakness in that sector.

At the same time, Barclays flagged that falling oil prices could act to temper how much more hawkish repricing occurs, even as real rates and a stronger dollar tighten conditions. The bank’s view leaves open the possibility of sustained volatility as market participants weigh evolving policy signals and macro developments.


Market implications -

  • Technology, AI and semiconductor shares face profit-taking pressure amid the rotation.
  • Defensive and quality stocks have begun to attract renewed buying interest.
  • Commodity-linked sectors are affected by both the dollar move and falling oil prices.

Risks

  • End of the global easing cycle - Barclays cautioned this could be a risk for equities into the second half, affecting cyclical and growth-sensitive sectors such as technology and commodities.
  • Unclear Fed reaction function - With Fed Chair Warsh's approach not fully defined, policy uncertainty could keep equity market volatility elevated, impacting market breadth and sector rotations.
  • Tighter financial conditions from higher real rates and a stronger dollar - These factors may sustain risk-off sentiment and pressure momentum-driven stocks, while benefiting defensive and quality names.

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