Coach of the U.S. had a successful secondary listing in Hong Kong last year.

FORBES: Hong Kong Fashion Chain I.T Sees "A General Slowdown" in China's Consumer Spending

There are now 21 ETFs listed in four markets--Japan, Singapore, Hong Kong and India--and seven that have a secondary listing in Asia, ( See table).

FORBES: Investment Guide

Just last month, U.S. luxury handbag company Coach made a secondary listing of its New York-traded shares in Hong Kong to boost its exposure among consumers and investors in the region.

FORBES: Look Out Cindy Crawford, Here Comes Hong Kong's Francis Choi

On the other hand, for small companies outside of New York and London, a secondary listing anywhere would be prohibitively expensive, especially if it means keeping two sets of books to satisfy differing accounting standards.

FORBES: Why the world would be better off with one big stock market.

Another three companies will list today: Shandong Longquan Pipeline Engineering, a pipe manufacturer, AoKang Shoes, a footwear supplier whose boss Wang Zhentao is a former China Rich List member, and Dongjiang Environmental Company, a waste management company traded in Hong Kong that has arranged a secondary listing in Shenzhen.

FORBES: Lujiazui Breakfast: News And Views About China Stocks -- April 26

Shares in Shanghai Fosun Pharmaceutical (Group), a Chinese pharmaceutical manufacturer and distributor controlled by billionaire Guo Guangchang, fell by 1% today after the company said it had received domestic regulatory approval for a secondary stock listing in Hong Kong.

FORBES: Shanghai Fosun Pharma Shares Fall 1% On Approval Of Hong Kong Listing