AMC shares jump another 13% as Reddit rally extends

Shares of AMC Entertainment Holdings Inc jumped 12.7% in premarket trading on Thursday, extending a social-media driven rally that has lifted the movie theater operator's stock by more than 500% since mid-May.

AMC's stock nearly doubled to $62.55 on Wednesday and was last up at about $70.50 in early deals.

Shares of other so-called "meme stocks", which have attracted attention from individual investors on online trading platforms, were also up. Koss Corp and BlackBerry Ltd rose 2.9% and 17.0%, respectively.