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    Musk’s Tweet-Fueled Bubble May Be About to Burst

    Elon Musk’s business empire may be starting to wobble.Over the past six weeks, the value of Tesla’s shares has plunged about 40 percent, wiping out virtually all they had gained after the 2024 election. This reversal reveals Mr. Musk’s soft underbelly: His fortune depends heavily on the inflated expectations of his rabid following. As those expectations deflate so will his power, demonstrating that financial markets are an underappreciated guardrail against both Mr. Musk’s and President Trump’s agendas.It is tempting to compare Mr. Musk to the true business titans of the past quarter century such as Apple’s Steve Jobs, Microsoft’s Bill Gates, Amazon’s Jeff Bezos, Meta’s Mark Zuckerberg, Nvidia’s Jensen Huang, and Google’s Larry Page and Sergey Brin. But those individuals created genuinely huge businesses that eclipse anything Mr. Musk has built by any possible metric. While Mr. Musk has built a car company from the ground up — no easy feat — his wealth is largely thanks to a financial cult, one in which legions of dazzled investor-followers have enabled him to launch an ever-growing list of disparate initiatives and provided immunity from critics who question his operational decision-making, his corporate governance, his obscene pay packages, and now his migration into the political sphere.The high-wire act goes something like this: Dream up a business so ambitious that any setback is trivial and every accomplishment heroic. Identify yourself as the manic genius behind this ambitious business in order to personally capitalize on outsize returns from excited investors. Enlist social media to cement your iconic status, keeping your believers so enthusiastic that their fervor beats back any skeptics who dare to bet against your ventures, even as you pitch more and more fantastical ideas. At this point you hit the flywheel: Other investors, searching for outsize returns, flock to the shares of your other companies, pushing their valuations ever higher, thus fortifying your wealth and burnishing your reputation as a business mastermind.If you’re lucky, this happens when investors are dreaming of alternatives to the poor returns available when interest rates are ridiculously low; magical thinking about the power of technology suppresses any worry about the risks of problems down the line; and retail markets are turning stock trading into something more akin to online gambling.Understanding this cult requires one to rethink what one knows about finance. Financial purists like to think of financial markets as neutral arbiters that merely record the value-creating activities of entrepreneurs. Financial pragmatists understand that prices need not always reflect value, as behavioral finance has demonstrated. But what if entrepreneurs can capitalize on these dynamics to manufacture fortunes and political power?This trick is precisely what Mr. Musk has mastered. His messianic status, which was birthed in the explosion of social media, created a powerful cycle of outsize returns on ventures that lead to investors providing him with more and cheaper capital to diversify his empire that, in turn, attracts yet more investors fearful of missing out. Skyrocketing Tesla shares have made fans and investors so devoted that all he has to do is mention a new ambition to goad them into buying even more. And the larger the stated ambition, the more wealth and power they hand him. So why not try for Mars? The final step in this process is to consolidate power in the political sphere to ensure that the outsize ambitions can be nourished forever. If Mr. Musk had played it well, his empire may have been impregnable.We are having trouble retrieving the article content.Please enable JavaScript in your browser settings.Thank you for your patience while we verify access. If you are in Reader mode please exit and log into your Times account, or subscribe for all of The Times.Thank you for your patience while we verify access.Already a subscriber? Log in.Want all of The Times? Subscribe. More

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    From AI to Musk’s Brain Chip, the F.D.A.’s Device Unit Faces Rapid Change

    The new director overseeing medical devices will confront criticisms about hasty approvals as she ushers in revolutionary technology.There are now artificial intelligence programs that scan M.R.I.s for signs of cancer, Apple AirPods that work as hearing aids and devices that decode the electrical blips of the brain to restore speech to those who have lost it.Medical device technology is now deeply entrenched in many patients’ health care and can have a stunning impact on their lives. As advancements become more tangible to millions of Americans, regulation of the devices has commanded increasing attention at the Food and Drug Administration.Dr. Michelle Tarver, a 15-year-veteran of the agency, is stepping into that spotlight at a critical time. She is taking the reins of the F.D.A.’s device division from Dr. Jeffrey Shuren, who forged deep ties with the device industry, sped up the pace of approvals and made the agency more approachable to companies. Some of those device makers were represented by Dr. Shuren’s wife and her law firm, posing ethical conflicts for him that continue to draw scrutiny.Dr. Michelle Tarver, an ophthalmologist and a 15-year veteran of the F.D.A.’s medical device division.U.S. Food and Drug AdministrationMore broadly, congressional lawmakers and consumer advocates have become increasingly concerned about the device industry’s influence over the sprawling division, which has a budget of about $790 million and a staff of 2,500. Device safety and standards for agency approvals of products as intimate as heart valves or neural implants will be at the forefront of the division’s mission in the coming years. Among the issues Dr. Tarver will encounter:Brains, computers and Elon MuskFew devices will require such intense oversight as one of the most breathtaking technologies in development: brain-computer interfaces that dip into the surface layers of the brain to decode its electrical noise — and return function to people who have lost it.Researchers from a number of teams have demonstrated the capability to restore the voice and speech of a California man with ALS, to enable a paralyzed man to walk and to help a man who is paralyzed below the neck to play Mario Kart by simply thinking about steering left or right.We are having trouble retrieving the article content.Please enable JavaScript in your browser settings.Thank you for your patience while we verify access. If you are in Reader mode please exit and log into your Times account, or subscribe for all of The Times.Thank you for your patience while we verify access.Already a subscriber? Log in.Want all of The Times? Subscribe. More