“ [The meme-stock] surge is powered by advances in trading technology, wider use of leverage, and the rapid expansion of the options market. Confidence among retail traders is notably higher, fueled in part by recent gains in crypto markets,” wrote Mark Hackett, chief market strategist at Nationwide.

Conventional wisdom is out the door for some surging stocks as online hordes are bringing back meme stock mania.

Investor enthusiasm faded for the latest meme stocks on Wednesday, with shares in heavily shorted Krispy Kreme and GoPro closing well below their session highs, while Tuesday's investor darling - department store Kohl's - finished sharply lower.