for stock market trading (including USA market)
join
http://www.kgieworld.com
if you don't truck the stock broker corp.
you may want to use the service in a bank, too
try hang seng bank account
(stamina account **for man)
NOTE they have another name for woman (of the same service)
the first year, minimum is you must keep HK$50000 (at all time) in your bank account.
in the 2nd year, minimum is keeping HK$200,000 (at all time) in your account.
the whole package including
(1) a saving account
(2) a current account *cheque book account
(3) a stock trading account
so you can move your money around these 3 accounts via the internet service
http://hangsengbank.com/e-banking
**as long as you have HK$50000 (1st year) or HK$200,000 (2nd year)
it is alright...
for mutual fund
you may consider to use
http://www.aia.com.hk