Roundhill Investments resurrected an exchange-traded fund focused on meme stocks on Wednesday, aiming to give everyday investors a simple way to play the new class of buzzy-yet-volatile stocks.But if history repeats itself, that could signal the trade — and broader market — is already losing its steam.Roundhill said the Meme Stock ETF, which launched again on Wednesday, trades under the ticker MEME. That's the same ticker the firm used for its previous meme-focused ETF that launched in late 2021 before clos ...