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Jen-Hsun Huang, president and chief executive officer of Nvidia Corp., speaks during the company’s event at Mobile World Congress Americas in Los Angeles, California, U.S., on Monday, Oct. 21, 2019.

Patrick T. Fallon | Bloomberg | Getty Images

Forget about the debt ceiling. Tech investors are in buy mode.

The Nasdaq Composite closed out its fifth-straight weekly gain on Friday, jumping 2.5% in the past five days, and is now up 24% this year, far outpacing the other major U.S. indexes. The S&P 500 is up 9.5% for the year and the Dow Jones Industrial Average is down slightly.

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Excitement surrounding chipmaker Nvidia’s blowout earnings report and its leadership position in artificial intelligence technology drove this week’s rally, but investors also snapped up shares of Microsoft, Meta and Alphabet, each of which have their own AI story to tell.

And with optimism brewing that lawmakers are close to a deal to raise the debt ceiling, and that the Federal Reserve may be slowing its pace of interest rate hikes, this year’s stock market is starting to look less like 2022 and more like the tech-happy decade that preceded it.

“Being concentrated in these mega-cap tech stocks has been where to be in this market,” said Victoria Greene, chief investment officer of G Squared Private Wealth, in an interview on CNBC’s “Worldwide Exchange” Friday morning. “You cannot deny the potential in AI, you cannot deny the earnings prowess that these companies have.”

Greene: The tech rally is likely to continue due to earnings power and the potential of AI

To start the year, the main theme in tech was layoffs and cost cuts. Many of the biggest companies in the industry, including Meta, Alphabet, Amazon and Microsoft, were eliminating thousands of jobs following a dismal 2022 for revenue growth and stock prices. In earnings reports, they emphasized efficiency and their ability to “do more with less,” a theme that resonates with the Wall Street crowd.

But investors have shifted their focus to AI now that companies are showcasing real-world applications of the long-hyped technology. OpenAI has exploded after releasing the chatbot ChatGPT last year, and its biggest investor, Microsoft, is embedding the core technology in as many products as it can.

Google, meanwhile, is touting its rival AI model at every opportunity, and Meta CEO Mark Zuckerberg would much rather tell shareholders about his company’s AI advancements than the company’s money-bleeding metaverse efforts.

Enter Nvidia.

The chipmaker, known best for its graphics processing units (GPUs) that power advanced video games, is riding the AI wave. The stock soared 25% this week to a record and lifted the company’s market cap to nearly $1 trillion after first-quarter earnings topped estimates.

Nvidia shares are now up 167% this year, topping all companies in the S&P 500. The next three top gainers in the index are also tech companies: Meta, Advanced Micro Devices and Salesforce.

The story for Nvidia is based on what’s coming, as its revenue in the latest quarter fell 13% from a year earlier because of a 38% drop in the gaming division. But the company’s sales forecast for the current quarter was roughly 50% higher than Wall Street estimates, and CEO Jensen Huang said Nvidia is seeing “surging demand” for its data center products.

Nvidia said cloud vendors and internet companies are buying up GPU chips and using the processors to train and deploy generative AI applications like ChatGPT.

“At this point in the cycle, I think it’s really important to not fight consensus,” said Brent Bracelin, an analyst at Piper Sandler who covers cloud and software companies, in a Friday interview on CNBC’s “Squawk on the Street.”

“The consensus is, on AI, the big get bigger,” Bracelin said. “And I think that’s going to continue to be the best way to play the AI trends.”

Microsoft, which Bracelin recommends buying, rose 4.6% this week and is now up 39% for the year. Meta gained 6.7% for the week and has more than doubled in 2023 after losing almost two-thirds of its value last year. Alphabet rose 1.5% this week, bringing its increase for the year to 41%.

One of the biggest drags on tech stocks last year was the central bank’s consistent interest rate hikes. The increases have continued into 2023, with the fed funds target range climbing to 5%-5.25% in early May. But at the last Fed meeting, some members indicated that they expected a slowdown in economic growth to remove the need for further tightening, according to minutes released on Wednesday.

Less aggressive monetary policy is seen as a bullish sign for tech and other riskier assets, which typically outperform in a more stable rate environment.

Still, some investors are concerned that the tech rally has gone too far given the vulnerabilities that remain in the economy and in government. The divided Congress is making a debt ceiling deal difficult as the Treasury Department’s June 1 deadline approaches. Republican negotiator Rep. Garret Graves of Louisiana told reporters Friday afternoon in the Capitol that, “We continue to have major issues that we have not bridged the gap on.”

Treasury Secretary Janet Yellen said later on Friday that the U.S. will likely have enough reserves to push off a potential debt default until June 5.

Alli McCartney, managing director at UBS Private Wealth Management, told CNBC’s “Squawk on the Street” on Friday that following the recent rebound in tech stocks, “it’s probably time to take some of that off the table.” She said her group has spent a lot of time looking at the venture market and where deals are happening, and they’ve noticed some clear froth.

“You’re either AI or you’re not right now,” McCartney said. “We really have to be ready to see if we don’t get a perfect debt ceiling, if we don’t get a perfect landing, what does that mean, because at these kinds of levels we are definitely pricing in the U.S. hitting the high note on everything and that seems like a terribly precarious place to be given the risks out there.”

WATCH: CNBC’s full interview with UBS’ Alli McCartney

Watch CNBC's full interview with UBS' Alli McCartney

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How black boxes became key to solving airplane crashes

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How black boxes became key to solving airplane crashes

After the search for survivors and recovery of victims in tragic aviation accidents — like that of a UPS cargo plane shortly after takeoff from Louisville Muhammad Ali International Airport in Kentucky last month — comes the search for flight data and a cockpit voice recorder often called the “black box.”

Every commercial plane has them. Aerospace giants GE Aerospace and Honeywell are among a few companies that design them to be nearly indestructible so they can help investigators understand the cause of a crash.

“They’re very crucial because it’s one of the few sources of information that tells us what happened leading up to the accident,” said Chris Babcock, branch chief of the vehicle recorder division at the National Transportation Safety Board. “We can get a lot of information from parts and from the airplane.”

Commercial aircraft have become very complex. A Boeing 787 Dreamliner records thousands of different pieces of information. In the case of the Air India crash in June, data revealed both engine fuel switches were put into a cutoff position within one second of each other. A voice recording from inside the cockpit captured the pilots discussing the cutoffs.

“All of those parameters today can have a very huge impact on the investigation,” said former NTSB member John Goglia. “It’s our goal to to provide information back to our investigators who are on scene as quick as we can to help move the investigation forward.”

This crucial data can also help prevent future accidents. A crash can cost airlines or plane manufacturers hundreds of millions of dollars and leave victims’ families with a lifetime of grief.

But in some circumstances black boxes were destroyed or never found. Experts say further developments such as cockpit video recorders and real-time data streaming are needed.

“The technology is there. Crash worthy cockpit video recorders are already being installed in a lot of helicopters and other types of airplanes, but they’re not required,” said Jeff Guzzetti, aviation analyst and former accident investigator for the Federal Aviation Administration and NTSB. “There’s privacy and cost issues involving cockpit video recorders but the NTSB has been recommending that the FAA require them for years now.”

Watch the video to learn more.

CNBC’s Leslie Josephs contributed to this report.

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Stocks end November with mixed results despite a strong Thanksgiving week rally

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Stocks end November with mixed results despite a strong Thanksgiving week rally

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Palantir has worst month in two years as AI stocks sell off

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Palantir has worst month in two years as AI stocks sell off

CEO of Palantir Technologies Alex Karp attends the Pennsylvania Energy and Innovation Summit, at Carnegie Mellon University in Pittsburgh, Pennsylvania, U.S., July 15, 2025.

Nathan Howard | Reuters

It’s been a tough November for Palantir.

Shares of the software analytics provider dropped 16% for their worst month since August 2023 as investors dumped AI stocks due to valuation fears. Meanwhile, famed investor Michael Burry doubled down on the artificial intelligence trade and bet against the company.

Palantir started November off on a high note.

The Denver-based company topped Wall Street’s third-quarter earnings and revenue expectations. Palantir also posted its second-straight $1 billion revenue quarter, but high valuation concerns contributed to a post-print selloff.

In a note to clients, Jefferies analysts called Palantir’s valuation “extreme” and argued investors would find better risk-reward in AI names such as Microsoft and Snowflake. Analysts at RBC Capital Markets raised concerns about the company’s “increasingly concentrated growth profile,” while Deutsche Bank called the valuation “very difficult to wrap our heads around.”

Adding fuel to the post-earnings selloff was the revelation that Burry is betting against Palantir and AI chipmaker Nvidia. Burry, who is widely known for predicting the housing crisis that occurred in 2008 and the portrayal of him in the film “The Big Short,” later accused hyperscalers of artificially boosting earnings.

Palantir CEO Alex Karp vocally hit the front lines, appearing twice in one week on CNBC, where he accused Burry of “market manipulation” and called the investor’s actions “egregious.”

“The idea that chips and ontology is what you want to short is bats— crazy,” Karp told CNBC’s “Squawk Box.”

Despite the vicious selloff, Palantir has notched some deal wins this month. That included a multiyear contract with consulting firm PwC to speed up AI adoption in the U.K. and a deal with aircraft engine maintenance company FTAI.

But those announcements did little to shake off valuation worries that have haunted all AI-tied companies in November.

Across the board, investors have viciously ditched the high-priced group, citing fears of stretched valuations and a bubble.

In November, Nvidia pulled back more than 12%, while Microsoft and Amazon dropped about 5% each. Quantum computing names such as Rigetti Computing and D-Wave Quantum have shed more than a third of their value.

Apple and Alphabet were the only Magnificent 7 stocks to end the month with gains.

Sill, questions linger over Palantir’s valuation, and those worries aren’t a new concern.

Even after its steep price drop, the company’s stock trades at 233 times forward earnings. By comparison, Nvidia and Alphabet traded at about 38 times and 30 times, respectively, at Friday’s close.

Karp, who has long defended the company, didn’t miss an opportunity to clap back at his critics, arguing in a letter to shareholders that the company is making it feasible for everyday investors to attain rates of return once “limited to the most successful venture capitalists in Palo Alto.”

“Please turn on the conventional television and see how unhappy those that didn’t invest in us are,” Karp said during an earnings call. “Enjoy, get some popcorn. They’re crying. We are every day making this company better, and we’re doing it for this nation, for allied countries.”

Palantir declined to comment for this story.

WATCH: Palantir CEO Alex Karp: We’ve printed venture results for the average American

Palantir CEO Alex Karp: We've printed venture results for the average American

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