On January 12, 2010, an earthquake of 7.0 magnitude hit the island of Haiti, approximately 25 km west of Port au Prince. Up to 230,000 people died country-wide in the quake, and another 300,000 were injured. 180,000 to 300,000 households in Port-au-Prince (900,000 to 1.5 million persons) are estimated to have become IDPs as a result of housing destruction. This EMMA study focused on the market system for corrugated galvanized iron, a key material for housing reconstruction. To re-establish a flow along the supply chain ensuring income opportunities and CGI availability at all levels, a multifaceted approach that integrates the following elements is recommended: CGI vouchers to vulnerable households, redeemable at neighborhood hardware retailers; distribution of building material to very vulnerable HH who have limited mobility; cash grants for neighborhood retailers to rehabilitate shops and re-start business activities; facilitating small retailers' access to stocks; and advocating on behalf of market-based interventions to the international community.