This is what's happening on Wednesday, as quantum computing investors cheer some kind words from Microsoft's strategic missions and technologies chief, Mitra Azizirad, who last night urged quantum investors to get ready, because "we are right on the cusp of seeing quantum computers solve meaningful problems and capture new business value."

All it took to derail a rally that had sent shares of pure-play quantum computing stocks soaring was a single comment from a tech CEO. When Nvidia's Jensen Huang suggested that a useful quantum computer was likely decades away,