Twitter is on pace to be biggest loser in S&P 500 for third quarter

Twitter just seized a title no company wants: the worst performer in the S&P 500 Index. Its sharesdropped about 35 percent in third-quarter trading, which ended Friday — worse than every other company in the index.
 
Twitter’s tough quarter was set off by a disappointing earnings report. The stock plunged the most in four years after the firm said in July that monthly users had dropped by 1 million in the second quarter and predicted further declines as it fights against spam, fake accounts and malicious rhetoric. Shares sunk further earlier this month after an analyst at MoffettNathanson flagged