"Rivian, SolarEdge, and Sphere Entertainment Lead Pre-Market Stock Surge"

Rivian Automotive's shares rose 3.3% in premarket trading after being upgraded by Evercore ISI, which sees the electric truck maker as a potential rival to Tesla and BYD. Sphere Entertainment saw a 7% jump in its stock price after opening its Sphere venue in Las Vegas with a U2 concert. Insulet gained 3.4% after Jefferies upgraded the medical device maker, while Sunnova Energy International rose 1.5% as UBS initiated coverage with a buy rating. Clorox's stock rose 3.3% after being upgraded by D.A. Davidson, and AMC Entertainment's shares increased by 2% following the announcement of the distribution of "Renaissance: A Film by Beyoncé" in the U.S. in December.