Graff Diamonds sees 'tremendous' demand ahead of $1bn Hong Kong IPO Graff, which began an investor roadshow to drum up demand earlier this month, said it had received "tremendous" demand from investors. "Our target audience is extremely resilient and very much insulated to the general gyrations of world economies," the company said. One of Graff's chief rivals, Tiffany & Co, warned this month it would not meet forecasts because of a decline in Chinese demand. However, Graff executives said it would make "little difference" to its books if China's GDP growth rate moved by a half percentage point. Credit Suisse Group, Deutsche Bank, Goldman Sachs and Morgan Stanley are underwriting Graff's initial public offering, which is the second in Graff's history. The jeweller first listed on the London stock exchange in 1973, but its founder, Laurence Graff took it private again four years later. In 2010, he became the owner of the most expensive single jewel in the world, when he paid $46m for a rare, 24.68 carat pink diamond.