開設股票户口點解耐要公司同意??

This is a requirement when a person open a securities account while a person is working in the similar organisations. The objective of it is to identify or prevent any trading with insider information which is quite easily obtainable in banks, isurance companies and investment companies or an issue on money laundry.

Just let your employer know that you are having a securities account. They normally don't prevent you to do so. You just notify your employer in a form as a matter of fulfiling the requirement and it is a procedure.