Nord Anglia, Stamford, American School Hong Kong

These are the newer international schools that are more easy to get into. Since I am new to these, I would like to ask other experienced IS mommies, are these new schools ok, is there a chance that they might run out of business and close the school I am sorry if my question is too stupid. Because I have a little reservation about 'new' schools, even though I have went to their school tour and info sessions and completely attracted by their environment, facilities, and curriculum.
Thanks for you help!