Here are five things you must know for Friday, Sept. 22:
1. -- U.S. stock futures declined on Friday, Sept. 22, and Asian shares were rattled by the threat of another missile test from North Korea.
North Korea's foreign minister reportedly said his country may test a hydrogen bomb in the Pacific Ocean to fulfill Kim Jong Un's vow to take the "highest-level" action against the United States, the Associated Press reported.
Kim, in a statement, said Donald Trump is "unfit to hold the prerogative of supreme command of a country." He also described the U.S. president as "a rogue and a gangster fond of playing with fire."
Trump, on Thursday Sept. 21, levied new sanctions against North Korea.
European stocks traded mixed on Friday as investors focused on currency markets ahead of what could be a pivotal speech from U.K. Prime Minister Theresa May in Florence that defines the country's exit from the European Union.
As for the U.S., the economic calendar includes the PMI Composite Flash for September at 9:45 a.m. ET, and the weekly rig count from Baker Hughes at 1 p.m.
Following the Federal Reserve's move to begin unwinding its massive balance sheet, three Fed officials will be making the rounds on Friday. San Francisco Federal Reserve Bank President John Williams will be in Zurich, while Kansas City Fed President Esther George and Dallas Fed President Robert Kaplan will speak at an oil conference in Oklahoma City.
If you'd like to receive the free "5 Things You Must Know" newsletter, please register here.
2. -- Hewlett Packard Enterprise Co. (HPE) plans to cut about 10% of its staff, or at least 5,000 workers, Bloomberg reported, citing people familiar with the matter.
The cuts, part of an effort to pare expenses as competition increases, are expected to start before the end of the year, the people told Bloomberg.
Reductions are likely to affect workers in the U.S. and abroad, including managers, according to the Bloomberg report. HPE has about 50,000 workers.
The stock rose 1.7% in premarket trading on Friday.
The iPhone 8 and 8 Plus go on sale in Apple stores across the globe on Friday.
Buyers could be holding out for the iPhone X, due to be released in early November, or the weak turnout could be attributed to poor reviews for the iPhone 8.
As TheStreet's Brian Sozzi noted: "By most accounts, there is no reason to buy this phone when for a few more dollars you can buy the fancier iPhone X. Apple in effect has created an instantly obsolete smartphone."
Hundreds of people usually gather at Apple's Sydney city store with lines winding down the town's main street, George Street, when there is a new product release, Reuters noted. But there were fewer than 30 people lining up before the store opened on Friday, according to a Reuters witness.
4. -- Facebook Inc. (FB) reached an agreement with Congress to hand over Russian-sponsored ads purchased during the U.S. presidential election to congressional investigators.
In a live video broadcast Thursday afternoon on Facebook, CEO Mark Zuckerberg said the move was one of nine things the social network was doing to protect the integrity of elections around the world.
"I don't want anyone to use our tools to undermine democracy," Zuckerberg said.
Among the steps Zuckerberg said Facebook is taking are its own investigation into the Russian-backed ads, making political advertising on Facebook more transparent, strengthening the company's review of ads, increasing the size of teams focused on election integrity, expanding partnerships with election commissions, and increasing the sharing of threat information with other organizations.
This story has been updated from 5:50 a.m. ET.
More of What's Trending on TheStreet :