Billionaire investor Warren Buffett was a buyer of stocks to the tune of $9 billion last quarter, per a new regulatory filing from Berkshire Hathaway Inc (NYSE: BRKA).
### Instruction: What is the sentiment of this news? Please choose an answer from {negative/neutral/positive}
### Input: Billionaire investor Warren Buffett was a buyer of stocks to the tune of $9 billion last quarter, per a new regulatory filing from Berkshire Hathaway Inc (NYSE: BRKA).
### Response: moderately positive