I was interested if anyone hear does any investing in the so called 'frontier' markets? As I understand it, these are the exotic markets that are not typically invested in by foreigners (e.g. Mongolia, Sri Lanka, Estonia etc). This is characterized as difficult, with high, long-term returns, in markets which are small and with hence with low liquidity.
Not something I would (or could) do myself, but it would be interesting to hear of other peoples opinions on or involvement in this.