What is the sentiment of this news? Please choose an answer from {strong negative/moderately negative/mildly negative/neutral/mildly positive/moderately positive/strong positive}.
Text: Cathie Wood-led Ark Investment Management bought 297,818 shares of Nvidia Corporation (NASDAQ: NVDA), via three of the firm's exchange-traded funds, valued at over $41.5 million based on Thursday's closing price.
user
moderately positive
assistant