For the last five years, Harold Leung, an executive director with a Hong Kong-based investment-management company, has wanted to buy an apartment in Hong Kong. He and his wife, Elsa, are expecting their first child in July. But he keeps getting put off by the high prices in the city.

“There needs to be a big adjustment before we can go into the market,” he said. “I think the property market is overpriced. But for the last few years, I’ve been wrong.”