Stocks from the Reddit-forum frenzy are back on the move, with AMC Entertainment , Blackberry and Koss all up premarket. Here’s what we’re watching before Wednesday’s trading gets underway.

Joke cryptocurrency Dogecoin has jumped 16% from its 5 p.m. ET price after Coinbase said it would allow users to trade it on a platform that is geared toward more experienced investors.

The meme stocks are back. AMC Entertainment has already been on a tear recently, and is up another 23% premarket. Other shares popular among retail investors were also climbing, with BlackBerry up 15%, Koss up 7%—and perhaps the flagship stock for the Reddit crowd, GameStop , up a relatively meager 0.2%.

Shares of Samsung Publishing , which owns a stake in the producer of “Baby Shark,” climbed 6% in South Korean trading Wednesday after Elon Musk tweeted the viral children’s song with a note saying “Baby Shark crushes all! More views than humans.”

U.S. stock futures meandered around the flat line, suggesting muted moves for major indexes at the opening bell as investors awaited fresh insights on the economic rebound and rising inflation. Read our full market wrap here.