Nielsen Holdings PLC stock is currently doing a nosedive alongside Facebook. It looks like investors want nothing to do with companies make money off people's info/data.

>Headquartered in the U.K.,[1] Nielsen is a leading[7] global, independent measurement and data company for fast-moving consumer goods, consumer behavior, and media. With a presence in more than 100 countries and services covering more than 90% of the globe's GDP and population, Nielsen provides clients with data about what consumers watch (programming, advertising) and what they buy (categories, brands, products) on a global and local basis and how those choices intersect.[8]

https:// en.wikipedia.org/wiki/Nielsen_Holdings