HashKey Holdings Ltd., the operator of Hong Kong's largest licensed cryptocurrency exchange, experienced a volatile trading debut after its initial public offering (IPO) raised HK$1.6 billion ($206 million). The company's shares opened with a 6.6% gain but quickly fell, dropping as much as 8.4% before closing 0.2% lower at HK$6.67 per share. This performance comes after the company sold 240.6 million shares at HK$6.68 apiece, near the top of the marketed range. The sale valued HashKey at HK$18.5 billion, based on the expected share count in its listing document. Retail investors in Hong Kong snapped up 24.06 million shares, resulting in a 393.71 times subscription rate. This high demand highlights the growing interest in the cryptocurrency market and the potential for significant returns, but it also underscores the risks associated with such volatile investments.