(This story was updated with Selerity’s explanation about how it obtained Twitter’s financials.)
Traders who were shorting Twitter stock ahead of its earnings announcement Tuesday made a giant windfall. Twitter’s shares tumbled 18 percent, and about $5 billion in market cap instantly vanished. Investors were spooked by the $162 million first-quarter loss because the earnings statement was published online about 45 minutes ahead of schedule thanks to a Web-crawling bot that discovered the financials buried deep in Twitter’s investor relations page.