Kylie Jenner tweet sends Snapchat stock tumbling

Snapchat lost around $1.3bn in market value after reality star Kylie Jenner tweeted that she was no longer using the social app.

The half-sister of Kim Kardashian told her more than 24 million Twitter followers: "sooo does anyone else not open Snapchat anyone? Or is it just me... ugh this is so sad."