Saudi Arabia announced on Sunday that its East-West pipeline has been fully restored to its peak throughput of roughly 7 million barrels daily, following damage inflicted on its energy infrastructure during the ongoing conflict with Iran. The restart lands as oil crashes after a U.S.-Iran ceasefire and Iran’s move to reopen the Strait of Hormuz helped drive a 15.9% one-day tumble in WTI and a broad relief rally in U.S. stocks.

According to a report by Reuters, the kingdom’s energy ministry confirmed that infrastructure affected by the conflict, including the pipeline, has been fully repaired and is now back to regular functioning. The update followed the last week assessment that put the combined hit at roughly 600,000 barrels per day of production capacity and about 700,000 bpd of East-West pipeline throughput.

Saudi Pipeline Restoration: A Game Changer

Last week on Wednesday, the market mood swung between relief and renewed caution after an early report of an attack on Saudi Arabia’s east-west line tested risk appetite even as the ceasefire dominated headlines. By midday in New York, crude’s sharp drop helped pull the 10-year Treasury yield down about three basis points to 4.27%, its lowest level in roughly three weeks.

Equities responded as if the geopolitical premium had been stripped out of energy prices, with the S&P 500 up 2.5% to 6,783 and the Dow gaining 1,298 points to 47,882. The Nasdaq 100 climbed 3.1% to 24,951, while the Russell 2000 added 3.1% as the risk-on move spread into smaller, rate-sensitive names.

The East-West pipeline had effectively become Saudi Arabia’s key crude export outlet while the Strait of Hormuz was shut, and it was attacked hours after the ceasefire deal was reached, according to Reuters. The ministry also said it restored affected volumes from the Manifa oilfield after output there had been reduced by roughly 300,000 bpd.

What Does This Mean For Oil Prices?

The same day U.S. stocks jumped to one-month highs, WTI slid 15.9% to about $95 a barrel in its steepest one-session fall since April 2020, while Brent dropped 13.3% to near $94.70. Iran’s agreement to reopen the Strait of Hormuz was a key driver, unwinding a premium that had built during five weeks of fighting.

Energy-linked equities moved the other way, with the Energy Select Sector SPDR Fund (NYSE:XLE) down around 4% as the group absorbed the crude selloff. Exxon Mobil Corp. (NYSE:XOM) fell 6.1% to $153.92, ConocoPhillips (NYSE:COP) dropped 6% to $123.92, and Chevron Corp. (NYSE:CVX) slid 5.7% to $189.94.

Saudi officials said work is still underway to bring the Khurais facility fully back, after strikes lowered capacity by another 300,000 bpd, as reported by Reuters. Even with that remaining repair effort, the full pipeline restoration adds to the supply-side signals that helped cool inflation fears during Wednesday’s cross-asset swing.

That cooling showed up in rates and in Fed expectations, with markets pricing about a 35% chance of a rate cut by year-end versus near-zero odds at the start of the week. The shift helped push money into tech, industrials and consumer discretionary shares, the areas that typically benefit most when fuel costs and yields fall.

Escalating Tensions Impacting Oil Supply Stability

This situation unfolds amid escalating tensions, as Iran’s foreign minister, Abbas Araghchi, recently urged Saudi Arabia to expel U.S. forces, claiming it was “high time” to remove what he called “enemy aggressors” following an Iranian strike on a major American air base in Saudi Arabia last week. The strike resulted in injuries to 12 U.S. service members, heightening regional instability just as Saudi Arabia restored its East-West pipeline operations.

This backdrop of Iranian hostility underlines the geopolitical complexities surrounding oil supply stability, as the U.S. and Saudi Arabia’s longstanding security partnership faces new challenges, potentially influencing market responses to fluctuations in crude prices amidst the recent pipeline developments. The ongoing uncertainty could further impact oil prices, which have already seen significant swings.

Energy Sector Faces New Volatility Ahead

Airlines were among the biggest beneficiaries of the crude collapse, with the U.S. Global Jets ETF (NYSE:JETS) up 6.7% as investors repriced jet fuel costs. Delta Air Lines Inc. (NYSE:DAL) jumped 12% after posting better-than-expected quarterly results, combining company news with a sector-wide tailwind.

Tech also led, with the VanEck Semiconductor ETF (NASDAQ:SMH) up 5.3% and large-cap names like Alphabet Inc. (NASDAQ:GOOGL) and Meta Platforms Inc. (NASDAQ:META) each rising 3.7%. Meta also introduced its first AI model from its superintelligence research group, while NVIDIA Corp. (NASDAQ:NVDA) gained 2.1% and Microsoft Corp. (NASDAQ:MSFT) added 1.7%.