That pattern was echoed across Europe, with citizens of Madrid, Frankfurt, Vienna and Warsaw losing 15 minutes of sleep or more on average, according to Jawbone's data. And they could hardly be blamed, especially if they had investments, as stocks and currencies plummeted worldwide following the news.
To be sure, the data is limited: Jawbone trails companies like Apple, Fitbit and Xiaomi when it comes to market share of wearables, according to research firm IDC. Plus, with Brexit coinciding with longer stretches of daylight, Europeans have been sleeping just a little less for the past couple weeks, the data showed.
Still, at 35 minutes less than average, Londoner's Brexit sleep loss dwarfs the 2 to 16 minutes they had been missing in past weeks, Jawbone's data shows. Plus, Jawbone's past data has shown close correlation with major national events like sports games and holidays.