My children received significant gifts from grandparents, both to be their college fund and also nest eggs/etc. if they don't go to college for some reason or post-college. The gifts are in UTMA accounts; they're not in 529 accounts or similar, and I don't think we want them to be (as the money isn't just for college).
The accounts are big enough that they incur significant income taxes, and since the kids are young, they will be growing and paying taxes at our rate for quite some time (over ten years in both cases).
What kinds of investment choices are most sensible for this kind of capital? Right now they're just sitting in index funds, but those have typically generated ~2% in capital gains annually from what I've seen the last few years. That 2% is taxed at 25% federally plus 4% state after the first $2k, meaning we lose ~0.5% of the investment to taxes each year.
Are tax-managed funds like VTMSX or similar a good strategy for accounts like this? Or are we better off sticking with the very low overhead index funds and just accepting the taxable gains? And are we entirely wrong to consider 529s inappropriate (given the amount already is over what we expect college to cost, and we and the grandparents making the gift specifically didn't want to require it to pay for college if they choose otherwise)? Finally, are there other strategies that make sense for this kind of long-term investment?