Cathie Wood's Ark Invest has purchased a significant number of shares of SpaceX stock, with the amount reported as 210,121 shares. The purchase was made after the stock experienced a decline, with some outlets reporting a 16% tumble, and Ark Invest's total investment valued at $7 million or $32.5 million. The investment is seen as a vote of confidence in the company's long-term potential, despite a rocky debut on the Nasdaq-100.