ZURICH - Shares in Swiss watchmakers Swatch Group and Richemont fell on Thursday after the government in China, the industry's fastest growing market, banned TV and radio advertisements for expensive gifts.

The ban, announced by China's state news agency Xinhua on Wednesday, followed repeated calls from China's president-in-waiting Xi Jinping for a crackdown on graft.

Shares in the world's biggest watchmaker Swatch Group, which have gained almost 16 percent this year, were down 3.3 percent to 516 Swiss francs at 1445 GMT.

Rival Richemont was down 1.9 percent at 74.40 francs.

"I think you are seeing profit-taking coming into the stocks, triggered by the news that the Chinese government is going to ban TV and radio ads for watches in gifting," Kepler Capital Markets analyst Jon Cox said.

Luxury goods groups have seen double-digit growth rates in China, where the number of rich consumers has increased rapidly, but growth has slowed recently as China's economy loses steam and luxury goods become a target of the anti-corruption fight.

A survey from the Hurun Report, known for its annual China Rich List, showed last month that the crackdown on lavish spending had pushed expensive liquor and high-end watches out of favour in the luxury gift-giving market.

Kepler's Cox said mainland China represented about 10 percent of the market for Swiss watches.

"There is probably another 40 percent of the market where Chinese dominate such as Hong Kong, Singapore, other parts of greater China and also tourists in Europe, and here the outlook still appears positive," he said.

Vontobel analyst Rene Weber said the announced ban was mainly hitting Chinese shares.

Shares in Chinese watch retailers Emperor Watch and Jewellery and Hengdeli, in which Swatch has a stake, fell on Wednesday and Thursday.

Exane BNP Paribas analyst Luca Solca said the ban had only a limited negative impact on personal luxury goods shares given their makers mainly relied on print ads.