Key Highlights

● Oil rose on Friday, October 30, 2026.

● A Ukrainian strike hit a refinery in Samara, Russia.

● The attack added a second geopolitical concern.

● Brent settled at $113.43.

Oil prices rose on Friday, October 30, 2026, and a Ukrainian strike on a refinery in Samara, Russia, was among the factors cited for the gain. The attack added a second geopolitical concern to a market already focused on the conflict involving Iran.

West Texas Intermediate crude for December delivery rose $2.12 to $104.12 a barrel, according to market data. Brent Crude for January delivery settled at $113.43, according to market data, near its four-year high of $116.72 set on October 23.

Refineries as targets

Strikes on Russian refineries have been a recurring feature of the war between Russia and Ukraine. Refineries turn Crude Oil into products such as gasoline, diesel and jet fuel, and attacks on them can disrupt the Supply of those fuels and the flow of exports.

The reports reviewed did not provide details about the extent of damage at the Samara Facility or how long any disruption might last. But the strike added to a sense that supply risks are rising on more than one front at once.

Iran remains the main driver

The biggest force behind oil's rally remains the situation around Iran. On Friday, tanker incidents in the Strait of Hormuz, a key route for oil shipments out of the Persian Gulf, unsettled traders. Iran claimed that 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 said the Iran war is "going to end soon," according to market data. Vice President JD Vance sent a letter to Tehran about reviving talks, but Iran said it won't soften, according to market data.

Friday's gain capped a sharp rise in oil prices over October. WTI rose steeply during the month, according to both market data and market data, though the two reported different sizes for the gain.

Energy stocks benefited. The energy sector was the best performer in the S&P 500 on Friday. Exxon Mobil (NYSE:XOM) and Chevron (NYSE:CVX) rose and briefly hit record highs, with Exxon posting record refining results. ConocoPhillips (NYSE:COP) and EOG Resources (NYSE:EOG) reached 52-week highs.

Costs elsewhere

High fuel prices are a burden for many businesses. SkyWest (NASDAQ:SKYW) trimmed its 2026 Earnings outlook because of fuel costs, and its shares fell. Oil above $100 also adds to Inflation pressures at a time when September's personal consumption expenditures index showed inflation at its highest level since May.

The Federal Reserve 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.

The broader market fell sharply. The S&P 500 dropped 140.32 points to 7,580.07, the Dow Jones Industrial Average lost 572.25 points to 51,770.31 and the Nasdaq Composite slid 747.73 points to 25,437.00, its worst day since June. Intel (NASDAQ:INTC)'s cash-burn warning set off a chip selloff, and a reported $6.3 billion hack of the Binance crypto exchange hit digital assets.

What to watch

Traders will be watching for further attacks on energy infrastructure in Russia, as well as any word on damage at the Samara refinery. Developments in the Strait of Hormuz and any confirmation of US strikes on Iran are likely to remain the bigger drivers.

On the economic front, the October jobs report on Friday, November 6, and the Institute for Supply Management's surveys next week will show how the economy is handling high energy prices. Brent's October 23 high of $116.72 remains a key level for the market.