Oil prices and global stocks moved in opposite directions on Monday as traders waited to see whether a nuclear agreement between the United States and Iran would receive final approval from President Donald Trump.

The prospect of a US-Iran deal has created a split reaction across asset classes. Equity markets have generally welcomed the diplomatic progress, treating it as a sign of reduced geopolitical tension in the Middle East. Oil markets, by contrast, face a more complicated calculus: any deal that brings Iranian crude back into global supply would add barrels to an already well-supplied market.

Analyst Adam Sarhan summed up the equity side clearly. "Any news that we're getting closer to a deal is going to be received positively in the market," he said. The logic is straightforward: fewer hostilities in a major oil-producing region lower the risk premium that investors typically build into prices during periods of instability.

Why Oil Faces a Different Calculation

For crude markets, the same diplomatic progress that lifts stocks creates a supply concern. Iran holds significant proven oil reserves, and sanctions imposed over its nuclear program have kept a large portion of that output off the global market for years. A verified deal could allow Iran to resume or expand exports, adding supply at a time when OPEC and its allies are already navigating production decisions carefully.

That prospect has kept oil prices under pressure even as talks advance. Traders are essentially pricing in the possibility that a deal gets done, which means any formal announcement may already be partially reflected in current prices. If Trump rejects or significantly delays the agreement, that calculus reverses quickly, and oil would likely recover some lost ground.

The mixed signal across assets reflects a broader truth about how geopolitical events transmit through markets. Stocks and oil often move together during pure risk-off episodes, like an outright military escalation, but they can diverge sharply when the underlying event has asymmetric consequences for different asset classes. A diplomatic breakthrough reduces conflict risk for equities while simultaneously threatening oil revenue for producing nations and companies.

What Comes Next

The key variable is Trump's decision. Until a formal approval or rejection comes, markets are trading on probability rather than fact. Equity investors appear willing to position for a positive outcome, while oil traders are hedging against the supply consequences of one.

For energy companies, an Iran re-entry into global oil markets would put additional pressure on margins already squeezed by elevated production from elsewhere. Smaller producers with higher break-even costs are most exposed to a sustained drop in crude prices.

On the policy side, a deal would require verification mechanisms and a timeline for sanctions relief, both of which would shape how quickly Iranian barrels actually reach market. A phased or conditional agreement could soften the immediate supply impact and give producers more time to adjust.

Investors watching both asset classes should track official statements from the Trump administration closely. The gap between "closer to a deal" and a signed, verified agreement is where most of the remaining market uncertainty lives. Until that gap closes, expect continued mixed signals from oil and equities as each prices a slightly different version of the same outcome.