The growth of new active bitcoin users is slowing, which by “Metcalfe’s law” indicates that the cryptocurrency’s market capitalization will not grow as quickly as it has, some Swiss researchers said. Metcalfe’s law says the value of a network is proportional to the square of its users. By a generalization …

Kevin Lamarque | Reuters President Donald Trump (L) listens to EPA Administrator Scott Pruitt after announcing his decision that the United States will withdraw from the Paris Climate Agreement, in the Rose Garden of the White House in Washington, U.S., June 1, 2017. The Environmental Protection Agency will overturn the …

David J. Phillip | AP President George W. Bush, left, shares a laugh with Pastor Kirbyjon Caldwell as they are introduced during a fundraiser for the Power Center, a huge multi-use complex in southwest Houston, which is celebrating its’ 10th anniversary Friday, Sept. 12, 2003. The U.S. Department of Justice …

Frederick Florin | AFP | Getty Images An employee works on the production of insulin pens at the factory of the US pharmaceutical company Eli Lilly in Fegersheim, France. Pharmaceutical stocks are trading at one of their largest discounts to the market in nearly 10 years, J.P. Morgan told clients …

Bitcoin prices rallied above $7,000 Monday after shedding 25 percent last week, as major U.S. stock markets fell. The digital currency gained more than $500 from Easter Sunday, according to data from CoinDesk. Bitcoin traded at $7004 as of 12:56 p.m. ET Monday. It is still down more than 50 …

Oil prices turned sharply lower in thin trading on Monday, as the geopolitical concerns that underpinned last week’s rally faded. Crude futures had risen in overnight trading, lifted by a drop in drilling activity in the United States and concerns that Washington could reintroduce sanctions against Iran, OPEC’s third biggest …

Fitbit fell sharply Monday after Morgan Stanley downgraded the stock, warning clients that it’s “hard to see a floor” for the price of company shares despite new technology. “We see more downside to the stock as revenues struggle to stabilize and cash burn resumes,” analyst Yuuji Anderson wrote Monday. “We …

Patrick T. Fallon | Bloomberg | Getty Images Richard Pops, chairman and chief executive officer of Alkermes Shares of biotech company Alkermes dropped 20 percent Monday after announcing the U.S. Food and Drug Administration refused to review the firm’s drug for treating depression. The stock tumbled 20 percent to around …

Kevin Lamarque | Reuters Richard Smith, former chairman and CEO of Equifax Inc., testifies before House Energy and Commerce hearing on “Oversight of the Equifax Data Breach: Answers for Consumers” on Capitol Hill in Washington, U.S., October 3, 2017. Equifax, which suffered a massive data breach in 2017 that exposed …

Jonathan Ernst | Reuters President Donald Trump delivers remarks on the U.S. opioid crisis, at Manchester Community College in Manchester, New Hampshire, March 19, 2018. Amazon shares fell nearly 2 in the premarket Monday after President Donald Trump attacked the company from his Twitter account. The president said via Twitter …