 Luckin Coffee Inc ADR OTC: LKNCY, which trades as an over-the-counter stock, is plunging hard Friday following an announcement from the company regarding a Chapter 15 bankruptcy filing. What Happened: Luckin said that a verified petition under Chapter 15 of title 11 of the U.S. code has been filed on its behalf with the U.S. Bankruptcy Court for the Southern District of New York. 