Dow Jones Daily Quotes

Systems fool us by presenting themselves—or we fool ourselves by seeing the world—as a series of events. The daily news tells of elections, battles, political agreements, disasters, stock market booms or busts. Much of our ordinary conversation is about specific happenings at specific times and places. A team wins. A river floods. The Dow Jones Industrial Average hits 10,000. Oil is discovered. A forest is cut. Events are the outputs, moment by moment, from the black box of the system.

After a seminal paper in 2010 (see Bollen et al., 2011), the topic of alternative data started getting traction both in academia and in the hedge fund industry. The paper showed an accuracy of 87.6% in predicting the daily up and down changes in the closing values of the Dow Jones index when using Twitter mood data. This