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Market News/Article

News & analysis

NY —·Local —

Oil's Slide Below $100 Lifts Global Risk Appetite

Brent's brief dip under $100 on Middle East diplomacy hopes eased inflation pressure, pulled European bond yields sharply lower and carried the S&P 500 back to within half a percent of its record.

By PREVICT Research·Tue 22 Sep 2026 · 15:31 UTC
Illustrative photograph: A factory with a lot of red and white pipes
Photo by Christian Harb on Unsplash

Key points

  • Brent briefly fell below $100 a barrel after Trump said he would be open to meeting Iran's president at the UN, pulling European natural gas lower as well.
  • The S&P 500 rose 1.4% to within half a percent of its record high, while the Nasdaq and Magnificent 7 set fresh records.
  • European bond yields fell sharply and US Treasury yields declined by less, as traders pared back expectations for further rate hikes, especially in Europe.

Brent crude briefly traded below $100 a barrel as hopes rose for a diplomatic breakthrough in the Middle East, after President Trump said he would be open to meeting Iran's president at the United Nations, according to a Deutsche Bank review of the session. The drop in oil and European natural gas prices eased inflation concerns, supported sovereign bonds and led markets to trim expectations for further rate hikes, particularly in Europe.

The energy move fed directly into risk appetite. The S&P 500 climbed 1.4% and returned to within half a percent of its record high, while the Nasdaq and the Magnificent 7 group of megacaps notched fresh records. Meta surged on enthusiasm around its Muse AI agent, and AMD jumped after reaching a $1 trillion valuation. Bitcoin moved back above $85,000.

Bonds rallied alongside equities. Yields fell sharply across Europe, with smaller declines in US Treasuries, as the drop in energy prices reduced the inflation impulse that had been feeding expectations for further tightening. The repricing was most pronounced in Europe, where natural gas prices also fell.

The constructive tone survived a partial oil rebound. Overnight, crude recovered somewhat after Treasury Secretary Scott Bessent threatened tougher sanctions on Iranian airlines and service providers, but the broader market tone remained more positive. Some hawkish Federal Reserve commentary also failed to derail the momentum, with easing energy prices and renewed AI optimism keeping the bid intact.

Why it matters

The mechanism is straightforward: lower energy prices reduce the near-term inflation impulse, which lowers the expected path of policy rates, which in turn supports both sovereign bonds and equity risk appetite. The condition that would weaken this chain is a reversal in oil — the overnight rebound after the sanctions threat shows how quickly the diplomatic premise can be tested. If Brent holds below $100 and European gas stays soft, the rate-hike repricing has room to extend; if the Middle East diplomatic opening stalls and sanctions escalation resumes, the inflation relief that drove the move would unwind.

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