Oil Surge Fuels Broader Stock Sell-off Beyond Tech

WHO:

The Motley Fool - President Trump said of Fed Chair nominee Kevin Warsh, “I don't blame Kevin Warsh. I probably would have voted against the board if I were him.”

CNBC - The Dow, S&P 500, Nasdaq, Micron, Intel, Palo Alto Networks, CrowdStrike, and energy stocks were among the equities discussed.

CNBC - CrowdStrike CEO George Kurtz warned about vulnerabilities in PHP and the growing use of AI in cyberattacks.

CNBC - The Federal Reserve was due to hold a two-day meeting the following week.

Bloomberg Markets - Jonathan Ferro, Lisa Abramowicz, and Annmarie Hordern host “Bloomberg Surveillance.” The article description provided no additional market details.

WHAT:

The Motley Fool - The article said the Federal Open Market Committee raised its target rate by 25 basis points in September.

The Motley Fool - The article reported that the federal funds target rate was lowered six times between September 2024 and December 2025, reaching 3.50%–3.75%.

The Motley Fool - A New York Fed economists’ report estimated Trump’s tariffs added 2.9 percentage points to goods-price inflation by February 2026.

The Motley Fool - The article said inflation reached 4.2% in May, a three-year high, and had exceeded the Fed’s 2% long-term target for 67 months.

The Motley Fool - The article reported a 64% probability that the Fed would raise rates by at least 75 basis points in September 2027, according to CME Group’s FedWatch Tool.

CNBC - CrowdStrike CEO George Kurtz said the PHP vulnerabilities affect “tens of millions of internet-facing servers.”

CNBC - The upcoming earnings schedule included Boeing before Tuesday’s opening bell; GE Vernova in the morning and Alphabet, Microsoft, and FedEx in the evening on Wednesday; and Linde and Eli Lilly before Thursday’s open, followed by Amazon, Intel, Starbucks, and FedEx Freight that evening.

Bloomberg Markets - The Dow Jones Industrial Average slipped 1.2%; most S&P 500 companies fell.

Bloomberg Markets - Brent crude settled near $117, and a gauge of chipmakers edged up while recording its longest weekly drop since November.

Bloomberg Markets - Treasuries surrendered part of the previous session’s rally.

Bloomberg Markets - Seaport Research Partners Chief Equity Strategist Jonathan Golub argued stocks are not in an AI bubble, citing strong earnings and lower valuations.

Bloomberg Markets - Golub said strains were emerging in credit markets.

CNBC - Stocks fell as selling spread beyond technology. The Dow dropped more than 1%; the S&P 500 and Nasdaq were also lower.

CNBC - Cybersecurity and chip stocks helped keep technology modestly higher; Micron and Intel rose. Energy was the only other positive sector.

CNBC - West Texas Intermediate crude traded above $103 per barrel, while Brent topped $116, its highest level in six months.

CNBC - For the week, the Dow was modestly higher, while the S&P 500 and Nasdaq were modestly lower.

CNBC - Palo Alto Networks and CrowdStrike were described as winners on the day and for the week.

CNBC - CrowdStrike reduced its portfolio weighting from nearly 5% to 4.25%, securing an approximately 187% gain on shares bought in late 2024.

CNBC - About one-third of S&P 500 companies were scheduled to report quarterly results the following week, including 11 portfolio companies.

CNBC - The FedWatch tool put the probability of a rate increase at the upcoming Wednesday meeting at just over 10%, and the chance of a December increase at nearly 78%. A December increase would be the Fed’s second in 2026, after one in September.

WHERE:

CNBC - The sell-off occurred in U.S. stock markets; the article cited rising tensions in the Middle East as the backdrop to the oil-price surge.

CNBC - PHP is used on nearly 70% of websites, according to the article.

WHY:

The Motley Fool - The article attributed inflationary pressure to tariffs, the Iran war, and the AI infrastructure build-out; it said the Strait of Hormuz closure halted the flow of one-fifth of the world’s liquid petroleum.

CNBC - CNBC said defensive stocks joined the week’s selling, which had largely been concentrated in AI-related shares.

Bloomberg Markets - A flare-up in Middle East violence threatened oil supplies; persistent oil prices raised concerns about inflation.

Bloomberg Markets - Golub said a prolonged Middle East conflict could keep oil prices and inflation elevated, eventually forcing the Federal Reserve to respond.

CNBC - Oil prices rose amid heightened Middle East tensions. Elevated oil prices and hotter government price data kept inflation concerns prominent ahead of the Federal Reserve meeting.

CNBC - Researchers found AI could exploit longstanding PHP security flaws that hackers had previously considered too difficult and time-consuming to use.

HOW:

CNBC - The PHP vulnerabilities could allow attackers to break into vulnerable servers, steal sensitive information, and take control of websites. Government warnings followed, and organizations rushed to install fixes after details leaked ahead of schedule.

CNBC - Kurtz said patches had been released Wednesday, but outdated PHP versions remained in use and the patch likely did not fix all PHP problems. He warned, “You’re going to see a lot of breaches happening in the coming months.”

CNBC - Kurtz said CrowdStrike observed AI-powered attacks doubling each month from July through September. He said defensive AI was needed to counter offense, adding, “It almost becomes unsustainable unless you're using defensive AI to be able to combat what the offense is doing.”

Bloomberg Markets - The article description says Ferro, Abramowicz, and Hordern speak daily with Wall Street and Washington decision-makers on “Bloomberg Surveillance.”

(UPDATED October 24, 2026 19:02 UTC)

U.S. stocks fell as selling spread beyond technology, with the Dow down more than 1% and the S&P 500 and Nasdaq also lower. Rising Middle East tensions pushed Brent crude above $116 a barrel, heightening concerns that persistent oil prices could fuel inflation. Technology held up somewhat, supported by chip and cybersecurity shares, while energy was the only other positive sector. CrowdStrike CEO George Kurtz warned that newly exploited PHP vulnerabilities affect tens of millions of internet-facing servers, and could enable data theft and website takeovers. He said AI-powered attacks had doubled monthly from July through September, and warned that breaches could increase in the coming months. President Trump said he did not blame Fed chair nominee Kevin Warsh for opposing the board. Inflation remains above the Fed’s 2% target, while traders weighed the odds of further rate increases.

(UPDATED October 24, 2026 17:59 UTC)

U.S. stocks fell as selling spread beyond technology, with the Dow down 1.2% and most S&P 500 companies lower. Oil surged amid Middle East tensions, with Brent settling near $117 a barrel and West Texas Intermediate above $103, heightening inflation concerns. Treasuries gave back part of their previous rally, while chipmakers edged higher despite a prolonged weekly decline. Seaport strategist Jonathan Golub said strong earnings and lower valuations argue stocks are not in an AI bubble, though he warned of strains in credit markets. CrowdStrike CEO George Kurtz said PHP flaws affect tens of millions of internet-facing servers and could enable data theft or website takeovers. Patches are available, but older versions remain vulnerable. Kurtz also said AI-powered attacks doubled monthly from July through September. About one-third of S&P 500 companies are due to report next week, ahead of a Federal Reserve meeting.

(UPDATED October 24, 2026 14:05 UTC)

U.S. stocks fell as selling spread beyond technology, with the Dow down 1.2% and most S&P 500 companies lower. Cybersecurity and chip shares helped technology edge higher, while energy was also positive; Micron and Intel rose. Oil climbed amid Middle East tensions, with Brent settling near $117 and West Texas Intermediate above $103, raising concerns about inflation and oil supplies. Treasuries gave back part of their previous rally, while a chipmaker gauge rose despite its longest weekly decline since November. Seaport strategist Jonathan Golub said strong earnings and lower valuations argue stocks are not in an AI bubble, though he sees strains emerging in credit markets. CrowdStrike CEO George Kurtz warned that AI is making attacks more potent and that PHP flaws could expose servers and websites. He said AI-powered attacks doubled monthly from July through September, and urged stronger defensive tools.

(UPDATED October 24, 2026 13:07 UTC)

U.S. stocks fell as selling spread beyond technology, with the Dow dropping more than 1% and the S&P 500 and Nasdaq also lower. Cybersecurity and chip shares helped technology edge higher, while energy was the only other sector in positive territory; Micron and Intel gained, as did Palo Alto Networks and CrowdStrike. Oil climbed amid heightened Middle East tensions, with West Texas Intermediate above $103 a barrel and Brent topping $116, its highest level in six months. Higher energy costs and hotter government price data kept inflation concerns in focus ahead of the Federal Reserve’s meeting next week. CrowdStrike CEO George Kurtz warned that artificial intelligence is accelerating cyberattacks, with the company seeing AI-powered attacks double monthly from July through September. Researchers found AI could exploit old PHP flaws, putting vulnerable servers and websites at risk. Kurtz said patches were available, but outdated systems remained exposed.