'Now seems to be an especially opportune time to sell Twitter,' says MoffettNathanson

Twitter Inc. shares are off 0.9% in premarket trading Thursday after MoffettNathanson analyst Michael Nathanson reiterated his bearish call on the stock and argued that Twitter isn't spending enough to deal with the safety and security issues plaguing Big Tech. "As we look into the second half of 2019, now seems to be an especially opportune time to sell Twitter," he wrote. "Just based on the math, Twitter is approaching difficult top-line comps given the sharp recovery in its U.S. business in 3Q 2018." Social-media peer Facebook Inc. has more than seven times as many employees working on safety and security matters as Twitter has, according to Nathanson, suggesting that Twitter "still does not seem to be doing enough to secure its platform, while its valuation remains as stretched as ever." The stock is up 30% so far this year, as the S&P 500 has gained 15%.

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