Sharp swings for Nvidia and oil prices weigh on Wall Street

NEW YORK (AP) — Big swings for Nvidia's stock price and oil prices are weighing on Wall Street Thursday, but the U.S. market appears to be absorbing them.

After falling nearly 1% at the start of trading, the S&P 500 quickly pared its drop to 0.4%. The Dow Jones Industrial Average was down 50 points, or 0.1%, as of 10:15 a.m. Eastern time, while the Nasdaq composite was down 0.6% after trimming its early loss of 1.6%.

At the center of the action was Nvidia's stock. It plunged as much as 14% at the start of trading following the resignation of Jensen Huang, its CEO, co-founder and face of the brand. The chip company’s stock has been sinking since its board announced an investigation into Huang for a relationship with a woman suspected of being a Chinese government agent.

It’s a stunning fall for Huang and for Nvidia, which had become Wall Street’s most valuable and influential stock because of its central role in the artificial-intelligence boom. Its stock price set a record last month after soaring an astounding 1,722% in four years. That compares with the already healthy gain of nearly 109% for the overall S&P 500 over the same time.

But Nvidia’s price dropped 27% from then through Wednesday on worries about whether Huang would remain and how Nvidia would navigate a future without him. Nvidia’s board answered the first question Thursday morning, when it said Huang resigned, and it named Chief Financial Officer Colette Kress as its interim CEO.

The second question remains to be determined. And it looms over the entire market because Nvidia and the broader AI industry have been the main reasons the U.S. stock market has set so many records in recent years.

Nvidia, to be sure, is still selling AI chips at a quick rate regardless of who stands on a stage and talks them up. Nvidia quickly halved its early loss from Thursday, and its stock was most recently down 6.1%.

Outside of Nvidia, other stocks across the AI industry swung in the uncertainty.

CoreWeave, which buys Nvidia chips and then rents out access to them to customers over the cloud, fell 9%. Micron Technology, which sells memory for computers that’s been getting gobbled up in the AI frenzy, sank 4.9%.

But Broadcom rose 5.3%, and Advanced Micro Devices added 1.8% on hopes for a competitive advantage. The rival chip companies to Nvidia were two of the strongest forces limiting the S&P 500's losses.

GE Vernova, which is helping to power AI data centers, flipped from a loss of 3% to a gain of 1%.

Also swinging on Thursday were oil prices after President Donald Trump said he’s no longer interested in a deal with Iran to end their war. Instead of that, Trump said he asked his vice president to focus on investigating U.S. cities and states run by Democrats.

“We don’t need a deal with Iran,” Trump said on his social-media platform. “Those days have long since passed. We’ve got their money, Hundreds of Billions of Dollars, and we’ve got their Strait!”

The price for a barrel of Brent crude oil suddenly went from about $92 to more than $94 following Trump’s posting, before it later eased back. It was most recently at $93.79, up 1.1%.

It’s been veering sharply since the United States and Israel began the war with Iran in late February, bouncing between roughly $70 and $150.

Higher oil prices push up worries about inflation, and the yield on the 10-year Treasury climbed to 5.07% from 4.98% late Tuesday. Trading in the bond market had been closed Wednesday for Veterans Day.

In stock markets abroad, indexes were mixed in Europe following a weaker finish in Asia.

Hong Kong’s Hang Seng fell 1.3% for one of the world’s biggest moves.

AP Business Writer Yuri Kageyama contributed to this report.

A screen on the floor of the New York Stock Exchange displays news about Nvidia's stock price in New York, Monday, Nov. 9, 2026. (AP Photo/Yuki Iwamura)

A person looks at an electronic display board showing Japan's Nikkei index at a securities firm, Monday, Nov. 9, 2026, in Tokyo. (AP Photo/Eugene Hoshiko)

A person walks below a huge screen, displaying the foreign exchange rate between U.S. dollar and South Korean won in Seoul, South Korea, Wednesday, Nov. 11, 2026. (AP Photo/Lee Jin-man)

The screen showing the Korea Composite Stock Price Index (KOSPI) is seen in Seoul, South Korea, Wednesday, Nov. 11, 2026. (AP Photo/Lee Jin-man)

WASHINGTON (AP) — Middle-aged men should undergo regular screening for prostate cancer, the American Cancer Society said Thursday in a major change to its guidelines.

The screening involves a simple blood test, and men at average risk of getting prostate cancer should get that PSA test every two years between the ages of 50 and 69, the cancer society advised.

Men at high risk, including Black men and those with a strong family history of prostate cancer, should get yearly PSA checks and start earlier, at age 45.

Thursday’s guideline update marks a shift in thinking about routine blood tests for PSA, or prostate-specific antigen.

Since 2010, the cancer society has recommended that men at average risk talk with their doctors about whether to get regular PSA tests. That’s a protein produced by both normal and cancerous prostate cells, meaning a high level might signal a tumor but also could be from a benign enlarged prostate or be a temporary spike from vigorous exercise.

Widespread PSA testing in the past was blamed for overtreatment of slow-growing tumors and unnecessary follow-up testing in men who turned out to not have cancer.

The updated advice comes after advances in understanding PSA's benefits and how to reduce potential harms, according to the cancer society. That includes steps such as repeating a PSA test to be sure it’s really high or adding an MRI scan to help identify who needs a biopsy.

How long should men continue screening? Starting at 70, men should talk with their doctors about whether it’s beneficial to continue the routine PSA checks, the guideline says. But it discourages screening for men 80 and older and those of any age who aren’t expected to live another 10 years because of other health problems.

Prostate cancer is one of the most common cancers in men. The cancer society estimates more than 333,000 men in the U.S. will be diagnosed with prostate cancer in 2026, and about 36,000 will die of it.

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FILE - This 1974 microscope image made available by the Centers for Disease Control and Prevention shows changes in cells indicative of adenocarcinoma of the prostate. (Dr. Edwin P. Ewing, Jr./CDC via AP)