Illustration: Lazaro Gamio/Axios

The five biggest U.S. stocks — Apple, Microsoft, Alphabet, Amazon and Facebook — have grown so explosively that they account for nearly 18% of the S&P 500 index by market value, AP reports.

Why it matters: Never before have five companies held such powerful sway over the index, according to Morgan Stanley strategists.

The history: The last time five stocks controlled this much of the S&P 500 was during the tech bubble at the turn of the millennium.

  • That bubble eventually popped, and stocks like Cisco and GE shrank to become smaller players. Microsoft was also among them, but it has since climbed back to the top.

One difference between this time and the dot-com bubble is that many analysts don't see prices as grossly over-inflated now.

  • Each of today's Big Five is producing strong growth even when the global economy has been stuck in a sluggish pace for years.

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Updated 18 mins ago - Politics & Policy

Coronavirus dashboard

Illustration: Sarah Grillo/Axios

  1. Politics: Obama: Trump is "jealous of COVID's media coverage" Axios-Ipsos poll: Federal response has only gotten worse.
  2. Health: Hospitals face a crush — 13 states set single-day case records last week.
  3. Business: Winter threat spurs new surge of startup activity.
  4. Media: Pandemic causes TV providers to lose the most subscribers ever.
  5. States: Nearly two dozen Minnesota cases traced to three Trump campaign events.
  6. World: Putin mandates face masks.

Louisiana braces for 3rd hurricane in 2 months as Tropical Storm Zeta nears

Municipality workers clean the streets of garbage in Playa del Carmen, Mexico, on Tuesday that was left by Zeta, which struck the Yucatan Peninsula as a Category 1 Hurricane a day earlier — causing no major damage to infrastructure. Photo: Medios y Media/Getty Images

Tropical Storm Zeta is expected to strengthen back into a hurricane and bring dangerous storm surge conditions to parts of the northern Gulf Coast on Wednesday, per the National Hurricane Center.

The state of play: Louisiana Gov. John Bel Edwards (D) requested a pre-landfall Federal Declaration of Emergency in a letter to President Trump on Tuesday, ahead of the storm's expected arrival south of New Orleans.

2 hours ago - Technology

Trump's campaign website hacked

A screenshot of the Trump campaign website after it was hacked.

The Trump campaign website briefly went down and its "About" page was modified after hackers attacked the site Tuesday evening.

The big picture: With just seven days before the election, the hackers emulated the FBI and declared on the "About" page that: "this was seized. the world has had enough of the fake-news spreaded [sic] daily by president donald j trump. it is time to allow the world to know truth." Two addresses linked to the cryptocurrency Monero appeared on the site. Trump campaign spokesperson Tim Murtaugh in a statement said no sensitive data had been exposed in the attack.

Go deeper: Twitter hack raises fears of an unstable election