Cathie Wood's ARK Invest purchased approximately $9.1 million worth of Robinhood shares on Wednesday, marking its largest acquisition of the stock since April 29. The move follows a significant sell-off earlier this month, during which ARK divested about $47.5 million in Robinhood shares between October 6 and October 9, when the stock traded between $107 and $112. The recent purchase came after Robinhood released its third-quarter earnings report, which revealed a 55% year-over-year decline in crypto trading revenue to $120 million. Additionally, the company's crypto trading volume dropped by 38% to $50 billion during the same period.