Why does Ed Yardeni say 'the Fed is back in play' amid the renewed US-Iran crisis?

Yardeni says 'the Fed is back in play' because the rupture in the US-Iran ceasefire risks sparking a fresh acceleration in inflation, which could compel the Federal Reserve to raise interest rates — not only has the Fed pivoted to tightening, but it may actually have to tighten further.

What specific geopolitical developments triggered Yardeni's warning about renewed inflation and Fed action?

The trigger was President Trump’s warning that the tentative ceasefire with Iran may be over, following new US strikes against Iran and the revocation of a waiver allowing Iranian oil sales — causing Brent crude to surge past $79 a barrel, rendering last month’s interim peace deal 'ineffective', and reigniting a persistent geopolitical crisis reminiscent of March.

Yardeni Says Inflation, Fed Back in Play as Iran Crisis Returns

Jul 8, 2026

Market strategist Ed Yardeni warns renewed Iran-US tensions could spike oil and gasoline prices, potentially forcing the Federal Reserve to raise interest rates amid rising inflation. Brent crude surged past $79 per barrel following US strikes and revoked waivers on Iranian oil sales.

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