Ark Invest has marked down its Twitter valuation by 47% since it was taken over by Elon Musk, the Wall Street Journal reported. Musk had recently tweeted that Twitter's advertising revenue has been cut in half since he took over the company. Given Musk purchased Twitter for $44 billion late last year, the markdown would put the company's current valuation at about $23 billion, based on Ark's estimate. "We're still negative cash flow, due to ~50% drop in advertising revenue plus heavy debt load," Musk said of Twitter on Twitter. We also think that longer term, Elon and team are very serious that they're going to turn this into an everything app," Wood said.

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Persons: Elon Musk, Musk, Cathie Wood, Wood, Elon Organizations: Elon, Wall Street Journal, Service, Wall Street, Invest's Venture, Twitter, Fidelity, Ark, Nvidia, Nasdaq Locations: Wall, Silicon