Eli Lilly’s stock tanked 6% over just one day late last week, wiping billions of dollars from its market cap amid a single tweet from a fake account that was verified by Twitter. | Eli Lilly’s stock tanked 6% over just one day late last week, wiping billions of dollars from its market cap amid a single tweet from a fake account that was verified by Twitter. Now, Lilly is getting its own back on the social media platform by pulling ads from the site.