Shares of high-end jewellery and watch retailers slumped yesterday amid concerns that the anti-corruption push on the mainland would take its toll on sales of luxury goods. Emperor Watch & Jewellery, which fell the most in more than a year, ended down 7.14 per cent at 91 HK cents. Chow Sang Sang dropped 7.2 per cent to HK$ 20.60, while Luk Fook slid 5.6 per cent to HK$ 25.45.