[supplied_demand]

Thanks for responding. I actually tried to build an economic framework to determine what makes an investable asset class. I came up with the following 4 major areas, with each having 2 sub-areas.

1. Stability = Portfolio Balance + Asset Durability

2. Liquidity = Marketplaces + Intermediaries

3. Transparency = Price Transparency + Regulators

4. Liability = Tax Treatment + Maintenance Costs