Riyadh airport strike kills 12, the FAA warns U.S. airlines until Dec. 10 and oil rises 2%

The Federal Aviation Administration told U.S. airlines to "exercise caution" in and around Saudi Arabia after Yemen's Iran-backed Houthis struck King Khalid International Airport in Riyadh, CNBC reported. A projectile hit a passenger terminal on Saturday, killing at least 12 people and wounding more than 300, according to officials cited by CNBC. The airport was still closed Monday, and some airlines have suspended flights there for the rest of the week.

The FAA said the risk covers "aircraft at all altitudes," citing military activity and interference with navigation systems. Its warning runs until Dec. 10. Delta Air Lines had planned to launch its first nonstop Atlanta-Riyadh service on Oct. 23 and said Monday it will delay it until March; Bloomberg carried the same news.

What oil did

Crude rose. CNBC had December Brent up 2% at $106.81 a barrel at 8:45 a.m. ET and WTI up 2.1% at $93.73. At 10:51 a.m. ET our markets board showed WTI at $94.95, up 2.0%, and Brent at $109.43, up 2.05%. The board uses spot-based pricing, which is why it sits above the December futures contract.

Stocks were mixed at the same moment: the S&P 500 was down 0.13%, the Nasdaq 100 down 0.70% and the Dow up 0.32% on our board. Gold was down 0.7% at $4,165, and the dollar index was up 0.23%.

The pattern behind a 2% move

A 2% rise looks like a reaction. Set against the last three weeks, it is closer to the market's usual response to a Houthi headline: a jump, then a fade, because what matters to supply is the Saudi export route, not the target.

• Sept. 24: oil rose nearly 3% after Houthi missiles were aimed at Saudi Arabia's Yanbu hub, while diesel futures barely moved (our report).
• Sept. 28: oil gave back its jump after reports that the East-West pipeline had been restored to about 3.5 million barrels a day against a 7 million capacity (our report).
• Oct. 5: the Houthis claimed an attack on an Aramco facility in Riyadh, the coalition called the claim misleading, and WTI was down 2.1% at $91.63 in the afternoon when we wrote it (our report).

Saturday's strike differs in one respect: the target was civilian, with a confirmed casualty count and an airport closure, not a claimed hit on an energy site. Nothing we have read says oil flows from Saudi Arabia have been reduced by it. The Saudi-led coalition said it was dealing with another round of drone and missile attacks on Monday, per CNBC, so that can change.

Who it hits

The oil effect is a few dollars on a barrel. The cost that lands on a business is different:

• Airlines. Delta's delay shows how a warning like this works in practice: a launch date moves by five months, and crews, aircraft and marketing built around it are reassigned. The FAA notice ends Dec. 10, so any decision to restart Saudi routes comes after that at the earliest.
• Contractors and shippers. Anyone with staff or cargo moving into the kingdom now faces closed airport slots, higher war-risk insurance and State Department travel advisories. The U.S. and Australia have both advised against travel to the region, per CNBC.
• Fuel buyers. Diesel is the number to watch, not crude. It is still the tightest part of the market, with the AAA average at a record $6.5276 a gallon in late September, per CNBC.

The other half of Monday's oil move

Oil had been down about 1.5% earlier in the session on hopes tied to President Trump's "energy ceasefire" between Russia and Ukraine and a Russian diesel supply deal, then turned higher after Ukrainian President Volodymyr Zelenskyy said Russia had attacked six energy facilities that day, CNBC reported. Former IEA oil chief Neil Atkinson told CNBC the diesel volumes "are very small" and "not really market moving." So the Gulf attack and the ceasefire doubts landed on the same morning, and the 2% move is the sum of both, not the airport strike alone.

What to watch

Three things decide whether this is a headline or a supply event: whether Riyadh's airport reopens this week, whether Saudi loadings at Yanbu hold near the 3.5 million barrels a day reported two weeks ago, and Wednesday's September CPI, forecast at 3.6% on the year on our economic calendar, which will show how much of this year's energy shock is already in prices.

Sources: CNBC, Bloomberg, WSJ, Financial Times, AAA via CNBC, Chronicle markets board and archive. Figures are as of the times stated and move quickly. This is market information, not investment advice.