Oil prices surge after attack on Saudi Arabia; interest rates and housing market under pressure

Wednesday (2026-10-21) US stocks closed higher, with the S&P 500 ETF SPY up 0.53% and the Nasdaq ETF QQQ up 1.05%. A new development early Thursday occurred in the Middle East: Saudi Arabia was hit by a deadly attack, pushing Brent crude to around $111 per barrel.

This Issue Map

Main thread: Saudi hit, oil prices jump again

Early Thursday morning, a deadly attack occurred inside Saudi Arabia. Brent crude rose to around $111 per barrel, and U.S. WTI also climbed toward $99. The U.S. also ordered some embassy staff and families to evacuate. The day before, Saudi Arabia had already canceled an investors’ conference known as the "Desert Davos" due to Houthi attacks from Yemen, and the UK said it was willing to provide military support.

This matters because the supply buffer is already very thin. Tanker passage through the Strait of Hormuz has long been nearly cut off, and now another major oil producer has been attacked, making it hard for the market to assume supply will resume on its own. Imagine a city where the main artery is blocked and then the alternate routes report accidents; traffic naturally becomes chaotic.

At the same time, there were signs of easing from the Russia side, but they did not cap prices. U.S. envoy Whitakoff has arrived in Russia to meet with Putin. The Russian side agreed to hold talks on the Ukraine issue, but said there is not much to discuss. On the same day, the Russian Ministry of Defense said it had struck military-industrial and infrastructure targets in Kyiv and Odesa. According to the Wall Street Journal, on 10/14 Musk ordered restrictions on Starlink military service used by Ukraine, disrupting Ukrainian drone operations. The peace process remains at the pre-meeting stage, and there is no substantive increase in Russian oil supply.

Rising oil transmits to ordinary people first via inflation worries, then via long-term rates. The 10-year U.S. Treasury yield as of 10/21 was 5.13%, up 0.17 percentage points over the past 20 trading days. The 30-year yield was 5.42%. Long-term rates directly affect mortgages, so monthly payments for homebuyers increase accordingly. The Mortgage Bankers Association weekly data showed that in the week through 10/16, mortgage application volume for home purchases fell sharply again, marking the seventh week of decline. This indicator is viewed as a forward signal for October home sales, suggesting that high rates continue to pressure the housing market.

On equities, the Saudi news had not yet appeared at Wednesday’s close, so that close does not mean the market had already priced it in. The reaction after Thursday’s open is the first real test of this shock.

Oil shock tracking

The following are 5-day averages, compared to about a month ago. Brent spot is $13.2 richer than futures, a month ago it was $17.1, indicating spot tightness has eased somewhat. The futures curve spread between the near month and month-6 is $12.5, a month ago it was $11.4, essentially flat. Tanker transit through Hormuz as of 10/18 was still only 1.3% of pre-war normal. Overall, the supply shock is still ongoing.

Other things worth knowing

Unrelated to the main thread, two other items.

One is that China’s Q3 economic growth exceeded expectations. Strong exports offset weak consumption and continued real estate weakness; according to reports, Beijing is still on track to meet its 2026 growth target. Growth is mainly driven by external demand while domestic demand is weak, a structure that is more vulnerable to the external environment.

Two is that tensions on the Korean Peninsula have risen. Kim Yo-jong, Kim Jong-un’s sister, said border propaganda broadcasts toward South Korea would be resumed. Earlier, a landmine explosion injured three people, and the South Korean Foreign Ministry plans to write to the UN Security Council president. This is a new item on the geopolitical risk list; current reports do not show it has transmitted to markets.

Today’s logic: stocks are up, so why is borrowing cost for low-rated companies still rising?

Debt issued by low-rated companies pays interest higher than government bonds; the extra part is called the credit spread, reflecting market concerns about default. Shareholders participate in company growth, while bondholders only receive fixed interest; they don’t benefit if things go well but can lose principal if things go wrong, so the bond market is more sensitive to bad news. To use an analogy, shareholders are partners, bondholders are landlords collecting fixed rent, and they most fear tenants not paying.

Today’s example: SPY rose 0.69% over the past 20 trading days, while this type of credit spread widened 0.65 percentage points as of 10/20, to 3.33%. Higher long-term rates increase the burden of rolling debt, and the bond market priced that concern in first.

How the ETF Radar model sees it

First look at BNO, which tracks Brent crude futures. BNO rose 3.06% over the past 5 trading days (about a week) and 11.08% over the past 20 trading days. The transmission chain is straightforward: Middle East supply risk rises, Hormuz is nearly cut off, and Brent spot remains richer than futures. Looking forward, the ETF Radar model’s directional bias for the next 1 to 3 months is positive. There is uncertainty: the spot premium has narrowed compared with a month ago; if Russia-US engagement ultimately results in increased Russian supply, this logic would be weakened.

Next TLT, which is the long-term U.S. Treasury ETF. TLT rose 1.71% over the past 5 trading days, matching a 0.10 percentage point decline in the 30-year yield over the past 5 days — yields down, bond prices up. As for the outlook, the ETF Radar model’s directional bias for 1 to 3 months is negative. The basis is that the 30-year yield remains high at 5.42% and has risen 0.13 percentage points over the past 20 days. In addition, on the most recent 30-year Treasury futures, speculative funds are net short 154,020 contracts, plain language being that this class of funds overall expects Treasuries to fall. The past week’s rise is inconsistent with the model’s direction; the model focuses on the next 1 to 3 months, and the recent uptick has not changed that assessment.

Finally QQQ. QQQ fell 0.51% over the past 5 trading days, and rose 1.05% on Wednesday. The ETF Radar model’s directional bias for the next 1 to 3 months is negative. The chain is: UK GDP unexpectedly rebounded and the pound strengthened, the Bank of England is not in a hurry to ease, global long-term rates therefore remain elevated, and valuations of growth stocks whose profits are concentrated in the distant future are pushed down. The 10-year U.S. Treasury at 5.13% is the U.S. version of that chain. Wednesday’s rise runs counter to the model’s direction; the market and the model disagree in the short term, while the model is targeting 1 to 3 months. A short-term variable is that large tech companies such as Meta, Tesla, Microsoft, Google, and Amazon are about to report earnings in sequence.

Summary

The new element today is that the Saudi attack pushed Brent to around 111. The Russia contact has made progress, but spot supplies remain tight and long-term rates remain high; mortgage applications and credit spreads both show pressure. A reminder: the above are system quantitative model directional forecasts for the general market and do not constitute personal investment advice; consult a licensed investment advisor before investing.