- Margin borrowing seems like the default solution. I might try it if there's nothing better.
- Theoretically options could be used, but I'm unsure whether they work in practice.
- Supposedly futures offer massive leverage, but I haven't explored the details, and they seem hard to trade yourself. I'd like something I can just buy and hold for a long time.
- Something else?
Ideally, there should be a fund that you just buy into to get leverage, with someone else handling the details. But leveraged ETFs don't work because they're optimized for day trading and as a result lose money for buy-and-hold investors.