This ‘Meme Stock ETF’ Is Back. It Could Be a Warning Sign for the Market’s Rally.

A month ago, Opendoor Technologies OPEN -4.12% Chairman Keith Rabois brushed off the idea that shares of the online homebuying company were rising on hype alone. "It's not a meme stock,†Rabois said in an interview with CNBC. One of the country's best-known fund managers would beg to differ. Roundhill Investments resurrected an exchange-traded fund comprised entirely of meme stocks on Wednesday. Opendoor is the top holding. Less than two years after liquidating its original Roundhill Meme Stock ETF MEME +1.4 ...