Description: The roots of the crisis are understood on a simplified basis, by 3 Ls: a Lack of accountability b Leverage and c Liquidity. Historically, people requiring mortgages sought their mortgages from local institutions that would conduct the evaluation and hold the risk. Loan officers of these institutions were accountable for the outcomes of their decisions – defaults were a direct reflection on their judgment. Leverage was a second key factor. Institutions guaranteed mortgages against default. The third L, liquidity, because a problem. When property values eventually evidenced their inevitable fall, defaults occurred at historically high rates.