Biogen's Alzheimer's failure drove its stock down 29%. Photo: John Tlumacki/The Boston Globe via Getty Images

Biogen and Eisai have ended late-stage trials for an Alzheimer's disease drug, less than a year after the pharmaceutical companies painted a rosy picture of the drug's potential. Biogen's stock plunged 29% on the news.

The big picture: It's always a bad sign when clinical trials are discontinued before data are analyzed. It's an even worse sign for Alzheimer's research and raises questions about whether scientists should abandon the idea that the brain disease is "caused by sticky clumps of protein called amyloid plaques," according to a 2016 story by Stat.

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GM's high-stakes electric move

The Cadillac Lyriq. Image courtesy of Cadillac

Cadillac on Thursday unveiled the Lyriq, the luxury brand's first all-electric model and GM's first consumer electric vehicle unveil since the Chevy Bolt several years ago.

Why it matters: It's the first reveal by GM of an electric vehicle that will use the company's new modular platform and Ultium battery system — technologies meant to underpin the 20 electric vehicles that GM plans to launch by 2023.

Trump's TikTok and WeChat actions ratchet up the pressure on China

Illustration: Aïda Amer/Axios

President Trump escalated his campaign to claw apart the Chinese and American tech worlds Thursday evening, issuing executive orders that threaten to ban both TikTok and massive global messaging app WeChat.

The big picture: Trump's orders come against a backdrop of heightening tension with China, the steady unfolding of a hard "decoupling" between the world's two largest economies, and the Trump campaign's effort to wave a "tough on China" banner.

Updated 36 mins ago - Politics & Policy

Coronavirus dashboard

Illustration: Eniola Odetunde/Axios

  1. Global: Total confirmed cases as of 9 a.m. ET: 19,128,901 — Total deaths: 715,555— Total recoveries — 11,591,028Map.
  2. U.S.: Total confirmed cases as of 9 a.m. ET: 4,884,406 — Total deaths: 160,111 — Total recoveries: 1,598,624 — Total tests: 59,652,675Map.
  3. Politics: Trump floats executive action even if stimulus deal is reached.
  4. Business: U.S. economy adds 1.8 million jobs in July — Household debt and credit delinquencies dropped in Q2.
  5. Sports: The pandemic's impact on how sports are played.
  6. 1 🎮 thing: Video gaming growth soars.