Artificial intelligence euphoria hit a new level this week, as two chipmakers hit $1 trillion in stock market value. Driven by skyrocketing demand for chips that supply memory for AI, Micron Technology on Tuesday surged past the mark for its first time ever. South Korean chipmaker SK Hynix also joined the trillion-dollar club Wednesday. Their ascent has been rapid. Only 48 days earlier, Micron hit a $500 billion value. Its journey to the trillion-dollar milestone happened faster than those of