Key Highlights

● Vice President JD Vance sent a letter to Tehran about reviving talks.

● Iran said it won't soften its position.

● Crude prices rose on Friday, October 30, 2026.

● WTI gained $2.12 to $104.12.

Vice President JD Vance sent a letter to Tehran about reviving talks, according to market data. Iran said it won't soften its position. The exchange left the diplomatic path uncertain and gave oil markets little reason to expect a quick easing of tensions.

On Friday, October 30, 2026, crude prices rose. West Texas Intermediate for December delivery gained $2.12 to $104.12 a barrel, according to market data, while Brent for January delivery settled at $113.43, according to market data.

The Iran war and oil

The conflict involving Iran has been the main force behind oil's rise. WTI climbed steeply in October, according to market data, though the two reported different sizes for the gain. Brent hit a four-year high of $116.72 on October 23, according to market data.

Iran is a significant oil producer, and its location along the Strait of Hormuz gives it influence over a key shipping route. Tankers carrying crude from Persian Gulf producers pass through the strait on their way to world markets.

Trouble in the strait

On Friday, tanker incidents in the Strait of Hormuz were among the main drivers of the oil rally. Iran claimed vessels had been struck by mines, and one report described a tanker hit by limpet mines.

Reports also said the United States could resume strikes on Iran, with a commander briefing President Donald Trump on options. Trump, for his part, said the Iran war is "going to end soon," according to market data. The mix of a diplomatic letter, a refusal from Tehran, talk of strikes and a presidential prediction of peace left traders weighing several possible outcomes at once.

The Middle East was not the only concern. A Ukrainian strike on a refinery in Samara, Russia, added to worries about supply, as refinery attacks have become a recurring feature of the war between Russia and Ukraine.

Ripples across markets

Energy stocks led the market on Friday. Exxon Mobil (NYSE:XOM) and Chevron (NYSE:CVX) briefly hit record highs, and ConocoPhillips (NYSE:COP) and EOG Resources (NYSE:EOG) reached 52-week highs. SkyWest (NASDAQ:SKYW) trimmed its 2026 Earnings outlook on fuel costs, and its shares fell.

The broader market had its worst day since June. The S&P 500 fell 140.32 points to 7,580.07, the Dow Jones Industrial Average dropped 572.25 points to 51,770.31 and the Nasdaq Composite lost 747.73 points to 25,437.00. Intel (NASDAQ:INTC)'s cash-burn warning set off a global chip selloff.

Higher oil prices complicate the Federal Reserve's task. September's personal consumption expenditures index showed Inflation at its highest level since May. The Fed left its benchmark rate range unchanged at its October 27-28 meeting, but markets are pricing in a December hike, according to CME FedWatch data cited by market data. Chair Kevin Warsh said, "But inflation remains elevated."

On Friday, St. Louis Fed President Alberto Musalem said, "I judge that additional firming of Monetary Policy will be necessary, and soon."

What to watch

The next moves in the oil market are likely to depend on whether Vance's overture leads anywhere. Any sign that Iran is willing to engage in talks could ease prices, while continued refusals, further tanker incidents or confirmation of US strikes could push them higher.

Brent's October 23 high of $116.72 is the level traders are watching. On the calendar, the midterm elections on Tuesday, November 3, and the October jobs report on Friday, November 6, could also shape sentiment, along with the Institute for Supply Management's surveys next week, which will show how businesses are coping with high energy costs.