Business
How the S&P 500 Stock Index Became So Skewed to Tech and A.I.
Nvidia, the chipmaker that became the world’s most valuable public company two years ago, was alone worth more than $4.75 trillion as of Thursday morning. Its value, or market capitalization, is more than double the combined worth of all the companies in the energy sector, including oil giants like Exxon Mobil and Chevron.
The chipmaker’s market cap has swelled so much recently, it is now 20 percent greater than the sum of all of the companies in the materials, utilities and real estate sectors combined.
What unifies these giant tech companies is artificial intelligence. Nvidia makes the hardware that powers it; Microsoft, Apple and others have been making big bets on products that people can use in their everyday lives.
But as worries grow over lavish spending on A.I., as well as the technology’s potential to disrupt large swaths of the economy, the outsize influence that these companies exert over markets has raised alarms. They can mask underlying risks in other parts of the index. And if a handful of these giants falter, it could mean widespread damage to investors’ portfolios and retirement funds in ways that could ripple more broadly across the economy.
The dynamic has drawn comparisons to past crises, notably the dot-com bubble. Tech companies also made up a large share of the stock index then — though not as much as today, and many were not nearly as profitable, if they made money at all.
How the current moment compares with past pre-crisis moments
To understand how abnormal and worrisome this moment might be, The New York Times analyzed data from S&P Dow Jones Indices that compiled the market values of the companies in the S&P 500 in December 1999 and August 2007. Each date was chosen roughly three months before a downturn to capture the weighted breakdown of the index before crises fully took hold and values fell.
The companies that make up the index have periodically cycled in and out, and the sectors were reclassified over the last two decades. But even after factoring in those changes, the picture that emerges is a market that is becoming increasingly one-sided.
In December 1999, the tech sector made up 26 percent of the total.
In August 2007, just before the Great Recession, it was only 14 percent.
Today, tech is worth a third of the market, as other vital sectors, such as energy and those that include manufacturing, have shrunk.
Since then, the huge growth of the internet, social media and other technologies propelled the economy.
Now, never has so much of the market been concentrated in so few companies. The top 10 make up almost 40 percent of the S&P 500.
How much of the S&P 500 is occupied by the top 10 companies
With greater concentration of wealth comes greater risk. When so much money has accumulated in just a handful of companies, stock trading can be more volatile and susceptible to large swings. One day after Nvidia posted a huge profit for its most recent quarter, its stock price paradoxically fell by 5.5 percent. So far in 2026, more than a fifth of the stocks in the S&P 500 have moved by 20 percent or more. Companies and industries that are seen as particularly prone to disruption by A.I. have been hard hit.
The volatility can be compounded as everyone reorients their businesses around A.I, or in response to it.
The artificial intelligence boom has touched every corner of the economy. As data centers proliferate to support massive computation, the utilities sector has seen huge growth, fueled by the energy demands of the grid. In 2025, companies like NextEra and Exelon saw their valuations surge.
The industrials sector, too, has undergone a notable shift. General Electric was its undisputed heavyweight in 1999 and 2007, but the recent explosion in data center construction has evened out growth in the sector. GE still leads today, but Caterpillar is a very close second. Caterpillar, which is often associated with construction, has seen a spike in sales of its turbines and power-generation equipment, which are used in data centers.
One large difference between the big tech companies now and their counterparts during the dot-com boom is that many now earn money. A lot of the well-known names in the late 1990s, including Pets.com, had soaring valuations and little revenue, which meant that when the bubble popped, many companies quickly collapsed.
Nvidia, Apple, Alphabet and others generate hundreds of billions of dollars in revenue each year.
And many of the biggest players in artificial intelligence these days are private companies. OpenAI, Anthropic and SpaceX are expected to go public later this year, which could further tilt the market dynamic toward tech and A.I.
Methodology
Sector values reflect the GICS code classification system of companies in the S&P 500. As changes to the GICS system took place from 1999 to now, The New York Times reclassified all companies in the index in 1999 and 2007 with current sector values. All monetary figures from 1999 and 2007 have been adjusted for inflation.
The luxury shopping center in Pacific Palisades will reopen next month after more than $100 million in renovations forced by the January 2025 wildfire that devastated the Los Angeles neighborhood.
Palisades Village will reopen Aug. 15, owner Rick Caruso announced Wednesday. The outdoor center survived the blaze that destroyed homes and other businesses but needed refurbishment to eliminate contaminants that the fire could have spread.
Crews are putting finishing touches on mall buildings after tearing them down to the studs, treating the wood and rebuilding the walls, Caruso said.
“Everybody’s working, and stores are moving their products in,” he said. “It’s a really cool feeling that people have really locked arms and are working together.”
An electrician installs lighting for a restaurant at Rick Caruso’s Palisades Village on Thursday. The shopping center is scheduled to reopen mid-August.
(Myung J. Chun / Los Angeles Times)
Pacific Palisades resident Allison Polhill, who is rebuilding the home of 30 years that her family lost in the blaze, said she is “thrilled” at the prospect of returning to the mall she used to frequent. Its comeback is a boost for the community, she said.
“Every single step that we make to reopen our commercial corridors is going to bring more people back into the Palisades,” said Polhill, who expects to move back into her home at the end of August.
A total of 6,822 structures were destroyed in the Palisades fire, including more than 5,500 residences and 100 commercial businesses, according to the California Department of Forestry and Fire Protection.
Caruso previously attributed the mall’s survival to the hard work of private firefighters and the fire-resistant materials used in the mall’s construction.
The $200-million shopping and dining center opened in 2018 with a movie theater and a roster of upmarket tenants, including Erewhon, which may be the only grocer in the heart of the fire-ravaged neighborhood when it opens.
Caruso’s company was able to fill the mall with tenants despite the long shutdown.
Palisades Village is 99% leased, with the majority of tenants returning, said Jackie Levy, chief financial and revenue officer. Nearly one-third of the shops and restaurants are new to the property.
A firefighter carries a hose back to his rig while walking through a destroyed home from the Palisades fire in Pacific Palisades on Jan. 7, 2025.
(Genaro Molina / Los Angeles Times)
Last year, Pacific Palisades-based fashion designer Elyse Walker said she would reopen her eponymous store in Palisades Village after losing her 25-year flagship location on Antioch Street to the inferno.
Other neighborhood shops destroyed in the fire that are reopening at the mall include K Bakery and Loomey’s Toys, which caters to children up to age 12 and used to be across the street from Palisades Elementary Charter School.
“It’s been a journey and I’m excited because I wasn’t sure that there was going to be a place to come back to,” said toy store owner Amanda Rastegar. “Hopefully we can bring some of that magic back.”
Rastegar’s home in the Palisades survived but was damaged by the fire. The family returned about eight weeks ago. Her last memory of the fire was a burning supermarket.
“I just couldn’t wrap my brain around what was happening,” she said. “By the time I left, Gelson’s was on fire.”
Among the returning tenants is Angelini Ristorante & Bar. Well-known Los Angeles chef Gino Angelini said he will be in the kitchen next month for a return of the Italian restaurant.
“We won’t do a big celebrity open,” he said. “We want to have a very soft opening and see our customers come back.”
Construction takes place at Rick Caruso’s Palisades Village on Thursday. The shopping center is scheduled to reopen mid-August.
(Myung J. Chun / Los Angeles Times)
An elaborate celebration would not feel “correct for me,” Angelini said, because the devastation has been “very sad” for so many.
Other new tenants include local chef Nancy Silverton, who has agreed to move in with a new Italian steakhouse called Spacca Tutto. Women’s activewear retailer LESET will open its first West Coast location.
Caruso said he is optimistic that customers will return to the center, even though many Pacific Palisades residents are still dispersed. One tracking system estimated that about 30% of the Village’s customer base was impacted by the fire, he said.
“That means 70% did not get impacted, so there’s a lot of customers still left out there,” Caruso said. Historically, the center drew customers from as far away as Beverly Hills and Calabasas, as well as Malibu, Brentwood and Santa Monica.
He also hopes many will be inspired to visit the revived mall.
“I believe in the goodness of people and I believe that people are going to want to support the Palisades,” he said. “They’re going to want to be there and support the businesses that have had the courage and the heart to reopen.”
Walmart is rapidly expanding its network of electric vehicle chargers designed for customers to use while they shop.
The network could help fill gaps in EV infrastructure in states with greater need for chargers. Walmart, which has more than 5,000 locations in the U.S. and hundreds in California, says more than 90% of Americans live within 10 miles of one of its stores.
The chargers also offer an incentive for customers to choose Walmart — Walmart Plus members will receive a 10% discount off an average price of $0.46 per kilowatt-hour of energy at the company’s chargers.
Walmart chargers are already available at more than 75 locations in 17 states, with Texas boasting the most charging stations, followed by Florida and Arizona.
Matthew Nelson, Walmart’s director of energy policy, said last week on LinkedIn that the network will soon reach 29 states, including California.
“We are delivering on the promise of affordable, reliable and convenient charging,” Nelson said in his post.
According to Walmart’s website, six charging stations are coming to California soon, though the company did not offer a specific timeline.
The chargers will be installed at stores in Antelope, Brea, Fresno, Stockton, Suisun City and Vallejo.
Most charging sites in California will include eight to 16 fast-charging stalls, said Walmart spokesperson Kelsey Bohl.
The company first announced plans in April 2023 to install its own EV chargers at Walmart and Sam’s Club stores, with a goal of installing thousands of chargers by 2030. Partnering with ABB E-Mobility and Alpitronic, it added 25 new charging sites this past May and six more in June.
“Walmart is building a leading retail-integrated EV fast-charging network, focused on delivering an affordable, reliable and convenient charging experience where customers already shop,” Bohl said in an emailed statement. “Customers can charge while they shop, access stations through the Walmart app they already use, and benefit from affordable pricing.”
The charging stations already available include 612 individual charging stalls using 400-kilowatt chargers. Each stall has a dual charging cord with both Combined Charging System and North American Charging Standard connectors. The standard connectors, designed by Tesla, are smaller and lighter than the combined systems.
The primary way to pay for the chargers is through the Walmart app, but the company is also experimenting with built-in credit card readers to allow those without the app to use the stations.
Customers can check charger availability on the Walmart app. The company said the chargers will be available 24 hours a day.
Robotaxis could be turning into robocops.
A self-driving Waymo reported two teens to San Mateo, Calif., police on Monday after they were found drinking alcohol and shooting toy guns in the back of the vehicle.
According to a social media post from the San Mateo Police Department, officers detained two 15-year-olds after the Waymo they were riding in contacted the department and stopped in a parking lot until law enforcement arrived.
“Parents do you know where your teens are?” the San Mateo Police Department wrote on Facebook following the incident. “Waymo does!”
Officers removed both teens from the vehicle and determined they were using toy guns to shoot Orbeez out the windows. Orbeez are small, water-absorbing beads sold at toy stores.
“Toy guns, water guns, and BB guns all pose real dangers, especially to an untrained eye,” the Police Department said. “The simple handling of them can cause fear in [passersby].” “
A video posted on Facebook shows at least five officers and a police dog responding to the scene and approaching the Waymo with their weapons raised.
Waymo did not immediately respond to a request for comment.
Waymo vehicles have internal cameras and microphones that may be used in an emergency or to “promote safety and security,” according to Waymo’s online support page.
The cameras are also used to ensure the vehicles are clean and to help find lost items, according to the support page.
The company said it does not use facial recognition or other biometric identification technologies to identify individuals.
“In more urgent circumstances, support may access live video during a trip,” the Waymo page said.
The San Mateo Police Department’s Facebook post has garnered nearly 60 comments, with one user accusing Waymo of “snitching.”
“At least they got a designated driver?!” one user commented.
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