Take a look at some of the biggest movers in the premarket:

Virgin Galactic (SPCE) – The space transportation company's stock dropped 3% in premarket trading, after Bank of America Securities double-downgraded the stock to "underperform" from "buy." BofA notes the recent spike in the stock after the company received approval to carry passengers into space, and said the premium earned by Virgin Galactic's leading position is already reflected in the stock price.