There's comments on both China and HK already so I will give my 2 cents on Taiwan.
If you are talking about the local "IM", they are called "ITC" (investment income trust) in Taiwan. And they are not very big, in fact, they generally account for less than 10% or even 5% of daily market turnover. The foreign investors (QFII) generally account for 20-30% of turnover. The remaining t/o is ALL contributed by the retail investors. There are two reasons for it: 1) the local investors are highly involved in punting stocks themselves so they don't put money in mutual funds 2) the cross-straight relationship poses a potential danger to wealthy individuals, so alot of them wired out their money to abroad (HK for example). As a result, local IM industry is small in Taiwan. Some global long funds or hedge funds, however, may have dealing or research operations in Taiwan but in small scale (much larger in HK & Singapore). Other than those, the local insurance houses actually manage good sizes of funds. The largest I believe is Cathay Life Insurance that is under Cathay Financial Holdings. The government funds also do manage large funds but they are notorious for intervening the market (ie. buying stocks before election, etc). Hope it helps, cheers.