Can I run an online investment fund business model offshore?”
I’m assuming you’re in the United States. This model could, in fact, be an open or closed-ended investment. If you wanted to register this on a US exchange I believe it would be very hard to shelter it from taxes, though there probably are ways, seeing as many “American” companies are headquartered offshore. However, I’d be careful before jumping into anything, as the SEC is not someone you want to upset. You should probably raise a minimal amount of capital yourself, at least enough to further develop your business plan, consult a corporate lawyer, and talk to a few investment banks. Hope this helps and good luck.