Are there ETFs that bundle up highly speculative investments with high risk/reward profiles?
For instance, they might currently include Zambian, Nigerian, Brazilian and Venezuelan bonds; cryptocurrency-related equity; Russell 2000 penny stocks, and the like.
It might also include special derivatives, based, for example, on countries with very low GDP.
Because of the volatility, I assume that they would not operate like investment funds, but would need to constantly adapt their portfolio.