Because hedge fund was limited to "accredited investor", they are not well known to public.
ususally an "accredited investor" means:
# a natural person who has individual net worth, or joint net worth with the person抯 spouse, that exceeds $1 million at the time of the purchase;
# a natural person with income exceeding $200,000 in each of the two most recent years or joint income with a spouse exceeding $300,000 for those years and a reasonable expectation of the same income level in the current year; or