Stocks making the biggest moves premarket: VZ, TSLA, AAPL, WFC, T, SIRI & more

The telecom giant's stock was upgraded to "buy" from "hold" at Deutsche Bank, which said fundamentals are improving but the stock price hasn't yet caught up. Tesla TSLA – CEO Elon Musk sent an email to workers saying an unnamed employee had engaged in "extensive and damaging sabotage." Musk said the automaker is investigating whether the employee was working with any outside organizations. Apple AAPL – Apple's iPhones would not be subject to new tariffs on phones assembled in China, according to a New York Times report.