Following a more than sevenfold rally in its stock price over the past year, South Korea's SK Hynix is listing on the Nasdaq. Jung Yeon-je | Afp | Getty Images U.S. investors are getting a new way to buy into the memory boom. SK Hynix , the second most valuable company in South Korea, behind only Samsung, is slated to begin trading on the Nasdaq on Friday. The market debut,... [7633 chars]