An image of new Twitter owner Elon Musk is seen surrounded by Twitter logos in this photo illustration.
Elon Musk acquired Twitter on October 27.
  • 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.
  • Despite the steep writedown, Ark CEO Cathie Wood said she is still bullish on the company.

Ark Invest has marked down its valuation of Twitter by 47% since Elon Musk took over the company, but CEO Cathie Wood is still bullish on the company.