SEOUL—Hyundai Heavy Industries’ shares closed 86 percent above their initial public offering (IPO) price on their trading debut in South Korea on Friday. The shipbuilder, one of the largest in the world, raised $935 million from its IPO, with much of the proceeds set to fund investments in new technology. A total of 1,633 domestic and foreign institutional investors placed bids to acquire shares earlier this month, valuing total bids at 1,130 trillion won ($962.3 billion), according to Hyundai Heavy. The institutional book for the IPO had been 1,836 times covered—the second-largest for an IPO in South Korea after SKIET earlier this year. “Since the onset of the COVID-19 pandemic, the surge in container ship fares has spread to ship orders, raising ship prices,” said Meritz Securities analyst Kim Hyun. “If stronger green regulations and testing of new fuels lead to increased demand for eco-friendly ships that replace older fleets, …