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How is it legal to track someone's private jet? It's a question that has emerged in light of Twitter's decision to ban accounts that tracked private planes, including one — @ElonJet — that reported the flight activity of its own CEO, Elon Musk. The owner of the @ElonJet account, Jack Sweeney, has previously said that all the information he used to create the account is publicly available. Sweeney didn't respond to a request for additional comment. Although the data used to operate the @ElonJet account and other similar accounts tracking celebrity planes is publicly accessible, experts note there isn't a single government registry of such data. Instead, it actually requires putting together separate pieces of information to create tracking accounts. Doing so, of course, raises privacy concerns. The tracking capabilities are possible thanks to a technology called Automatic Dependent Surveillance–Broadcast (ADS-B). It's like global positioning system technolo...

In this article ARKK Follow your favorite stocks CREATE FREE ACCOUNT Catherine Wood, chief executive officer of ARK Investment Management LLC, participates in a panel discussion during the Milken Institute Global Conference in Beverly Hills, California, May 2, 2022. Lauren Justice | Bloomberg | Getty Images Cathie Wood's flagship ARK Innovation ETF staged a dramatic relief rally Thursday on the back of an easing inflation reading. The fund is on track to post its best day ever. The exchange-traded fund, with $6.9 billion assets under management, jumped more than 13% to hit an intraday high of $37.02, on pace to post its biggest daily pop since its inception in 2014. Zoom In Icon Arrows pointing outwards ARKK's biggest holding Zoom Video popped about 12%, while Tesla jumped nearly 7%. Roku advanced more than 11%. Teladoc climbed 12%. Unity, Invitae and Pacific Biosciences all traded up over 20% so far Thursday. As of midday, more than 28 million shares of ARKK have chan...