Detailed Instructions: In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Problem:FILE - This Dec. 21, 2016, file photo shows the New York Stock Exchange. Stock indexes are mostly lower in early trading on Wall Street as investors weigh the latest batch of corporate quarterly earnings... (Associated Press) 
  
 FILE - This Dec. 21, 2016, file photo shows the New York Stock Exchange. Stock indexes are mostly lower in early trading on Wall Street as investors weigh the latest batch of corporate quarterly earnings reports. Losses in technology companies outweighed gains in banks and other sectors early Thursday,... (Associated Press) 
  
 FILE - This Dec. 21, 2016, file photo shows the New York Stock Exchange. Stock indexes are mostly lower in early trading on Wall Street as investors weigh the latest batch of corporate quarterly earnings reports. Losses in technology companies outweighed gains in banks and other sectors early Thursday,... (Associated Press) FILE - This Dec. 21, 2016, file photo shows the New York Stock Exchange. Stock indexes are mostly lower in early trading on Wall Street as investors weigh the latest batch of corporate quarterly earnings... (Associated Press) 
  
 NEW YORK (AP) — The latest on developments in financial markets (all times local): 
  
 4 p.m. 
  
 A steep drop in Facebook pulled technology stocks lower on Wall Street, even as other sectors climbed. 
  
 Facebook plummeted 19 percent Thursday after warning of slower growth ahead, erasing more than $100 billion in value. 
  
 Renewed optimism that the U.S. and Europe might make progress on easing trade tensions helped send several companies higher on Thursday. Caterpillar rose 1.5 percent. 
  
 Strong earnings reports also helped send stocks higher. Airlines, energy companies and consumer goods stocks rose. 
  
 Small-company stocks did better than the rest of the market. 
  
 The S&P 500 index slipped 8 points, or 0.3 percent, to 2,837. 
  
 The Dow Jones Industrial Average rose 112 points, or 0.4 percent, to 25,527. The Nasdaq composite slid 80 points, or 1 percent, to 7,852. 
  
 ___ 
  
 11:45 a.m. 
  
 A steep drop in Facebook is pulling technology stocks lower, but other sectors are rising as investors hope for progress on trade talks. 
  
 Facebook plummeted 17.8 percent Thursday after warning of slower revenue growth. Ford fell 5 percent after announcing a big restructuring. 
  
 Qualcomm, Comcast and D.R. Horton rose after turning in solid results. 
  
 Gains in Boeing, 3M and Caterpillar helped lift the Dow Jones Industrial Average. Those companies would benefit if the U.S. and Europe make progress in defusing their trade fight. 
  
 The S&P 500 index slipped 1 point to 2,844. 
  
 The Dow gained 154 points, or 0.6 percent, to 25,569. The Nasdaq composite slid 54 points, or 0.7 percent, to 7,877. 
  
 Small-company stocks rose. More stocks rose than fell on the New York Stock Exchange. 
  
 ___ 
  
 9:35 a.m. 
  
 Stock indexes are mixed in early trading on Wall Street as investors weigh the latest batch of corporate quarterly earnings reports. 
  
 Losses in technology companies mostly outweighed gains in banks and other sectors early Thursday. 
  
 Facebook plunged 17.8 percent after the company reported that its user base and revenue grew more slowly than expected in the second quarter as the company grappled with privacy issues. 
  
 Homebuilder D.R. Horton jumped 6.9 percent after reporting solid quarterly results. 
  
 The S&P 500 index fell 5 points to 2,840. 
  
 The Dow Jones Industrial Average gained 128 points, or 0.5 percent, to 25,543. The Nasdaq composite slid 75 points to 7,857. 
  
 Bond prices rose. The yield on the 10-year Treasury note fell to 2.96 percent. ||||| Focused crawls are collections of frequently-updated webcrawl data from narrow (as opposed to broad or wide) web crawls, often focused on a single domain or subdomain. ||||| Facebook just had the biggest wipeout in stock market history. 
  
 Shares plunged 19% on Thursday after executives warned that revenue growth would slow as the company focuses on user privacy. 
  
 The sell-off vaporized about $119 billion in market value — the biggest single-day loss for any public company in history, according to Thomson Reuters. 
  
 For founder Mark Zuckerberg, the loss came to almost $16 billion, according to Forbes, which tracks billionaire wealth in real time. That dropped him from fourth to sixth on the list of richest people in the world. 
  
 Facebook (FB) Chief Financial Officer David Wehner said on a conference call with investors that Facebook is "putting privacy first" after the Cambridge Analytica scandal triggered a wave of horrible press, customer angst and regulatory scrutiny around the world. 
  
 Related: Facebook 'puts privacy first' and stock plunges 
  
 As an example of its new strategy, Wehner said Facebook will put more development muscle behind the company's Stories feature. That will put a drag on sales because Facebook makes more money on its core News Feed than its other products. 
  
 Facebook says it will spend a lot of money to accomplish its goals. Wehner said the company will invest billions of dollars per year improving safety and security after a bruising period of headlines about Facebook's role in enabling fake news and election meddling. 
  
 "We think that's the right thing to do for the business," he said. 
  
 Related: Facebook investors shouldn't panic 
  
 The company's previous worst single-day performance was July 27, 2012, when the stock fell 11.7%. The stock tanked that day after the company failed to convince investors that it could sell mobile advertising. Mobile now makes up 91% of the company's advertising revenue. |||||
Solution:
A steep drop in Facebook pulled technology stocks lower on Wall Street, even as other sectors climbed, the AP reports. Facebook plummeted 19% Thursday after warning of slower growth ahead, erasing about $119 billion in value. It was the worst single-day loss for any public company in stock market history, CNN reports, and it cost founder Mark Zuckerberg nearly $16 billion, dropping him from fourth to sixth on Forbes' list of richest people in the world. Meanwhile, renewed optimism that the US and Europe might make progress on easing trade tensions helped send several companies higher on Thursday. Caterpillar rose 1.5%. Strong earnings reports also helped send stocks higher. Airlines, energy companies and consumer goods stocks rose. Small-company stocks did better than the rest of the market. The S&P 500 index slipped 8 points, or 0.3%, to 2,837. The Dow Jones Industrial Average rose 112 points, or 0.4%, to 25,527. The Nasdaq composite slid 80 points, or 1%, to 7,852.