I'm pretty sure they have partnerships with the major stock and currency exchanges, pro sports leagues, and weather.com to get that data. EDIT: added some sour

I'm pretty sure they have partnerships with the major stock and currency exchanges, pro sports leagues, and weather.com to get that data. EDIT: added some sources (sorry, that's the best I could dig up in 5 minutes) [1] https://www.google.com/googlefinance/disclaimer/ https://www.google.com/googlefinance/disclaimer/ [2] https://searchengineland.com/google-now-with-real-time-nhl-hockey-scores-55878 https://searchengineland.com/google-now-with-real-time-nhl-h... [3] https://bits.blogs.nytimes.com/2015/03/31/ibm-scores-a-weather-data-deal-and-starts-an-internet-of-things-unit/ https://bits.blogs.nytimes.com/2015/03/31/ibm-scores-a-weath...