ETFs (exchange-traded funds) give US investors unprecedented access to frontier markets – less accessible but still ‘investable’ high-growth economies in the developing world.

But you need to tread carefully, says Sara Nunnally in Taipan’s Emerging Markets blog. Although there is a bunch of so-called “frontier ETFs” out there to chose from, not all of them make good investments.

If ETFs are your thing, stick to those focused on the Middle East and North Africa, says Sara…