Not as transformative as its founders hoped The Economist Feb 4th 2017 | ADDIS ABABA ON THE walls of the Ethiopia Commodity Exchange (ECX) in Addis Ababa, the capital, hang glossy black-and-white photographs of provincial market towns and rustic life. For the merchants and brokers striding across its high-tech trading floor they serve as a reminder that the ECX, sub-Saharan Africa’s most modern commodity exchange outside Johannesburg, exists for a simple, practical purpose: to transform Ethiopian agriculture. It has some way to go. By connecting smallholder farmers to global markets, the exchange, launched with a fanfare in 2008, was supposed to help reduce hunger. The hope was it would reduce price volatility and incentivise farmers to plant crops. But staple foods such as haricot beans today account for less than 10% of its trade. Its annual turnover—worth about $1bn—is dominated instead by two export crops, coffee and sesame seeds. In 2015, despite a dir...