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

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

By now most people, even those vaguely tuned into finances, have heard the phrase "meme stock." But if you're just catching up, here are some basics.

The market saw a fresh meme stock frenzy this week. While high exuberance can be a contrarian sell signal, sources say the market is still in good shape.

Meme traders are back and doing donuts in the stock market. What does it all mean? More than anything, a big appetite for risk. Shares of companies like Kohl's (KSS), Opendoor (OPEN), 1-800-FLOWERS (FLWS),