New exchange-traded fund (ETF) will allow investors to follow the most popular shares on Twitter. How good is this strategy? Market Profit, analyzing social networks in search of trends, creates a mutual fund, based on the developed "Social Media Sentiment Index" (Social Media Sentiment Index). In May, the company began tracking tweets with a "cashtag" - ticker symbols with a dollar sign.. New exchange-traded fund will buy and sell shares, popular on Twitter. It all reminds, that the rapid development of the ETF industry makes it possible to invest in ideas, which are not necessarily financially reasonable.