Here are five things you must know for Thursday, Oct. 19:

1. -- U.S. stock futures were tumbling on Thursday, Oct. 19, and European stocks sank after Spain's central government said it would assume control of the region of Catalonia after its president appeared to defy Madrid's deadline on dropping its call for independence.
 
"The government will continue with the procedures set out in Article 155 of the Constitution to restore the legality of self-rule in Catalonia," the Spanish government said in a statement, adding that suspension procedures will begin Saturday, Oct. 21.

Shares in Asia finished the session mostly lower after data showed that China's quarterly growth slowed slightly but was in line with expectations.

For U.S. investors, the economic calendar on Thursday includes weekly Jobless Claims at 8:30 a.m. ET, and the Philadelphia Fed Business Outlook Survey for October at 8:30 a.m.

U.S. stocks on Wednesday, Oct. 18, finished in record territory with the Dow Jones Industrial Average closing above 23,000 for the first time ever as strong earnings from International Business Machines Corp. (IBM)  pushed the blue-chip index higher. The S&P 500 added 0.07% for a record close. The Nasdaq rose 0.01% to a fresh record by the close of trading.

Verizon Communications Inc. (VZ)  reported third-quarter adjusted earnings of 98 cents a share, topping forecasts by 1 cent. Revenue of $31.72 billion also topped consensus estimates.

The stock dipped slightly in premarket trading on Thursday.

Earnings are also expected Thursday from PayPal Holdings Inc. (PYPL) , Travelers Cos. (TRV) , Alliance Data Systems Corp. (ADS) , AthenaHealth Inc. (ATHN)  and KeyCorp (KEY)  .

KeyCorp is a holding in Jim Cramer's Action Alerts PLUS Charitable Trust Portfolio. Want to be alerted before Cramer buys or sells the stock? Learn more now.

If you'd like to receive the free "5 Things You Must Know" newsletter, please register here.

2. -- Shares of eBay Inc. ( EBAY)  declined 6.5% in premarket trading after the online marketplace reported mixed third-quarter financial results. 

For the quarter, eBay reported adjusted earnings of 48 cents a share on revenue of $2.4 billion. Analysts polled by FactSet were expecting adjusted earnings of 48 cents share on revenue of $2.37 billion.

The company said it fourth-quarter revenue of between $2.58 billion and $2.62 billion, and adjusted earnings per share of between 57 cents and 59 cents. Analysts project fourth-quarter revenue of $2.58 billion and adjusted earnings of 60 cents.

Those scanning the many news headlines stating eBay's shares were selling off due to a disappointing profit outlook could be forgiven for thinking the company's latest earnings report acts as fresh proof that Amazon.com Inc. is eating eBay's lunch. But TheStreet's Eric Jhonsa said the truth is a little more complicated. 

Competitively, eBay still faces big challenges but seems to be in slightly better shape than it was at the start of the year, particularly overseas. The trouble is that eBY's top-line improvement has a bottom-line price attached to it.

3. -- American Express Co. ( AXP) was falling 1.5% in premarket trading after CEO Kenneth Chenault, who has led the lender for 16 years, announced he would be stepping down.
 
Chenault, 66 years old, who also serves as board chairman, will be succeeded by Vice Chairman Steve Squeri on Feb. 18, the New York-based company said in a statement on Wednesday. Squeri, who oversees operations including technology as head of the global customer services group, has worked at American Express since he took a management position in the traveler's checks business in 1985.

AmEx on Wednesday posted 19% growth in third-quarter profit. Net income of $1.4 billion, or $1.50 a share, outpaced the $1.48 average of analysts surveyed by FactSet as cardholder spending climbed. The company said it expects earnings for the year of $5.80 to $5.90 a share, while analysts expect earnings of $5.74. 

4. -- Shares of Gilead Sciences Inc. (GILD) were rising 3% in premarket trading on Thursday after the Food and Drug Administration approved Yescarta, Gilead's lymphoma therapy drug.

The treatment will cost $373,000 per patient, according to Gilead.

The drug was developed by Kite Pharma, which Gilead acquired earlier in October.

The treatment uses the same technology, called CAR-T, as the first gene therapy approved in the U.S. in August, a treatment for childhood leukemia from Novartis Pharmaceuticals.

5. -- The bidding for Amazon.com Inc.'s (AMZN) second headquarters closes on Thursday.

Amazon announced in September that it would be accepting bids. It has pledged to invest more than $5 billion and hire 50,000 people for its second headquarters. According to reports, more than 100 cities and counties have expressed interest in placing a bid.

Amazon said it would announce the winning bid in 2018.

This story has been updated to include earnings from Verizon.

More of What's Trending on TheStreet:

Join Jim Cramer, CNBC's Jon Najarian and Other Experts Oct. 28 in New York

Jim Cramer will host CNBC's Jon Najarian, TD Ameritrade's JJ Kinahan, famed analytics expert Marc Chaikin and other market mavens on Oct. 28 in New York City to share successful strategies for active investors.

You can join them as they discuss how smart investors can make the most of options trading, futures contracts, fundamental and quantitative analysis and great ETFs to buy right now. Participants will also get a chance to meet Jim and other panelists and take photos.

When: Saturday, Oct. 28, 8 a.m.-3 p.m.

Where: The Harvard Club of New York, 35 West 44th St., New York, N.Y.

Cost: $250 per person.

  • Click here for the full conference agenda or to reserve your seat now.

More from Futures

Futures Lower on Trade Worries and 4 Other Stories to Watch Thursday

Futures Lower on Trade Worries and 4 Other Stories to Watch Thursday

Google Faces Record Fine and 4 Other Stories to Watch Wednesday Morning

Google Faces Record Fine and 4 Other Stories to Watch Wednesday Morning

Netflix's Subscriber Miss and 4 Other Stories to Watch Premarket Tuesday

Netflix's Subscriber Miss and 4 Other Stories to Watch Premarket Tuesday

Amazon Prime Day and 4 Other Stories to Watch Ahead of Monday's Opening Bell

Amazon Prime Day and 4 Other Stories to Watch Ahead of Monday's Opening Bell

Stocks Rise Modestly and 4 Other Stories to Watch Premarket Friday

Stocks Rise Modestly and 4 Other Stories to Watch Premarket Friday