President-elect Donald Trump touted holiday spending and a strong stock market in a tweet on Monday evening.
Citron Research's Thursday afternoon tweet sent shares of Express Scripts tanking, and someone appeared ideally positioned for the move.
Twitter's CFO is going to want that one back.
More than three months after joining the microblogging site, Bob Diamond, the former chief executive of Barclays, has sent his first tweet, congratulating his daughter Nell on her wedding this weekend
Twitter's 'number two' head honcho told CNBC he was not concerned about the number of its users who were choosing not to 'tweet.'
It hasn't been a good few days for airlines on Twitter.
Dutch police have arrested a 14-year-old girl after she sent a tweet to American Airlines pretending to be a member of Al Qaeda and threatening an act against the airline this summer.