The current financial crisis has lessons for three areas of credit portfolio management. First, the credit crisis has highlighted the need to manage the funding risk of a bank. Second, it has highlighted the need to manage the underwriting risk of debt syndications. Finally, it has suggested the need to understand the drivers of relationship banking. The first paper in this dissertation develops an empirically grounded model to manage the funding risk of a bank. The second paper develops an option pricing framework to manage the underwriting risk in debt syndications. The last paper in this dissertation uses a proprietary dataset to study the empirical determinants of relationship banking benefits.