The sub-prime crisis emerges in large fraction due to financial instruments like securitization, where various loans are pooled by banks into sellable assets, thereby, off-loading precarious loans onto others. Several banks were taking on massive risks escalating their exposure to challenges and problems. High street banks dig up into a type of investment banking, selling, buying and trading risk. While investment banks that are not satisfied with selling, buying and trading risks dig up into mortgages, home loans, etc. devoid of administration and the right controls.

When problems and challenges have been seen by people, confidence fell swiftly. And in a few cases, lending ceased for a while for there is a confidence crisis. Some investment banks tend to sit on the riskiest loans which were not sought by other investors. Assets were dropping in value that is why lenders preferred to get their money back. However, a few investment banks had not much in deposits, no sheltered retail funding, resulting to some to fall quickly.

The problems and challenges were so large that even most banks that have huge capital reserves dash out. As a result, they had to resort to authority for bail out. Some banks that are shrinking are anxious about loaning as they attempt to put up their capital. Meanwhile, individuals and businesses that depend on credit often find it difficult to get.