Senate Rebukes Trump: Iran War Resolution Sparks Market Turmoil

The U.S. Senate took a historic step Tuesday by advancing a resolution aimed at halting military action in Iran, directly challenging President Donald Trump's foreign policy as the Iran conflict escalates. The move sent shockwaves through financial markets, with long-term Treasury yields surging to multi-year highs and the S&P 500 extending its losing streak to three days.

Market Reaction: Yields Spike, Stocks Slide

The 10-year Treasury yield reached 4.687% during Tuesday's session, its highest level since January 2025, before pulling back slightly on Wednesday to 4.576%. The 30-year bond yield briefly touched 5.197%, a level not seen since July 2007. In contrast, the 2-year yield slipped more than 7 basis points to 4.047%, reflecting shifting expectations for Federal Reserve policy. The S&P 500 notched its third straight loss as rising rates weighed on equities.

The yield spike was driven by escalating concerns that the Iran war could reignite inflation, forcing the Fed to raise interest rates. HSBC strategists described U.S. Treasurys as entering a "danger zone" in a note Tuesday. Minutes from the April 27-28 Federal Open Market Committee meeting revealed that a majority of officials anticipated rate hikes if the Iran conflict continued to intensify inflation. The Fed kept the federal funds rate unchanged at 3.5%-3.75%, but the decision drew the biggest dissension within the FOMC in more than 30 years.

Oil Prices Drop on Negotiation Hopes

Crude oil prices fell sharply on Wednesday after President Trump told reporters that the administration was in the "final stages" of negotiations with Iran. Brent crude dropped 5.63% to close at $105.02 per barrel. The decline helped ease some inflation fears, but analysts remain cautious. "The market is pricing in a potential de-escalation, but the Senate resolution adds a layer of political uncertainty that could prolong the volatility," said a market strategist.

Political Implications

The Senate resolution represents a major rebuke to Trump's Iran policy, with bipartisan support signaling deep unease over the administration's military posture. Lawmakers argue that the conflict has already strained the economy and risked a broader war. The resolution's advancement comes as the White House faces mounting pressure to de-escalate, though Trump has not indicated a willingness to change course.

Investors are now watching for any signs of a diplomatic breakthrough or further escalation. The bond market remains on edge, with yields likely to remain elevated until there is clarity on both the inflation trajectory and the Fed's response. The S&P 500's decline reflects growing risk aversion, as sectors sensitive to interest rates, such as technology and real estate, bear the brunt of the sell-off.

In other news, Google rolled out Gemini 3.5 Flash, and Anthropic hired OpenAI co-founder Andrej Karpathy, but these developments were overshadowed by the macro turmoil.

Key Takeaways

1. The Senate advances a resolution to halt military action in Iran, challenging Trump's policy.
2. 10-year Treasury yield hits 4.687%, highest since January 2025; 30-year yield briefly reaches 5.197%.
3. S&P 500 falls for third straight day as rising rates and inflation fears weigh on equities.
4. Oil prices drop 5.63% on hopes of U.S.-Iran negotiations, but inflation risks persist.
5. Fed minutes show majority of officials expect rate hikes if Iran war continues to fuel inflation.

Sources: CNBC Daily Open, CNBC Treasury Yields.