Thesis (MDF)--Stellenbosch University, 2013. / This study examines the default rate and performance of Microfinance bank (MFBs) loans to Small and Medium Enterprises (SMEs) in Nigeria based on the case study of Accion Microfinance Bank Limited (AMFB), Lagos State. Responses from 150 employees of AMFB revealed that the causes of default rate and performance of SMEs reflect the risk and vulnerability of the SME sector in Nigeria. It further showed that MFBs apply stringent credit criteria in granting loans to SME borrowers, coupled with the existing high cost of funds. The attitude, lack of transparency on the part of SME owners and fund diversion were identified as major factors responsible for the high default rate among SME borrowers. These and other factors warrant the need for further study in the areas of the impact of MFB loans on SME development given the new revised microfinance policy framework in Nigeria.