The S&P 500 Twitter Sentiment Index launched this week to measure public opinion of companies in the S&P 500 stock market index. Through the Twitter API, S&P analyzes both bearish and bullish tweets in real time to score the level of positive sentiment surrounding each company.
"Social media is impacting the way information is being conveyed to investors," Peter Roffman, S&P Dow Jones Indices global head of Innovation and Strategy, said in a statement. "Factor-based indices are a popular strategy for passive investors, so we're excited to work with Twitter to bring this unique tilt to the S&P 500."