GameStop and AMC Leisure shares lively once more premarket

The group of “meme” stocks, led by video game retailer GameStop Corp.
GME, -6.43%
which have been volatile in the past few weeks when investors in a Reddit subgroup spurred each other on, were again active in premarket trading on Monday. GameStop shares were up 5% ahead of market entry, while AMC Entertainment Holdings Inc.
AMC, -3.38%,
The world’s largest cinema chain grew by 12%. BlackBerry Ltd.
BB, -5.01%
rose 3.8% and Naked Brand Group Ltd.
NAKD, -8.77%
was up 9.5%. Koss Corp.
KOSS, -22.39%,
A manufacturer of headphones grew by 2.9%. GameStop shares are up 440% year-to-date as investors on Reddit’s WallStreetBets platform sought to punish short sellers who drove short interest in the stock to 140% by buying the stock and causing a short squeeze.