Shares in Krispy Kreme donuts, camera maker GoPro, and retailer Kohl's have risen dramatically this week, driven by online hype.

Memesters took the likes of Kohl’s and Krispy Kreme on a wild ride.

Financial markets once again have been seized by meme-stock mania. In mid-July, a frenzied rally erupted around a cohort of beaten-down companies, including Opendoor Technologies Inc., Kohl’s Corp. and Krispy Kreme Inc.

Meme-stock mania might be back, but old heads may have noticed that the moves this time around are lacking a certain explosiveness.