Demand for Prada Holding BV's initial public offering of stock, expected in June, is considered strong, although the timing puzzles some analysts. The fashion group's IPO would create a public luxury-goods group to rival leaders LVMH and Gucci. The industry's tumbling market valuations would make the Prada shares a good deal for investors, analysts said, but they added that it isn't clear whether the offering would be so good for Prada.