Ken Griffin's hedge fund, Citadel Advisors, has bought over $1 billion worth of this widely held stock over the past year.
### Instruction: What is the sentiment of this news? Please choose an answer from {negative/neutral/positive}
### Input: Ken Griffin's hedge fund, Citadel Advisors, has bought over $1 billion worth of this widely held stock over the past year.
### Response: moderately positive