Anatomy of a Crisis
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The global economic crisis in September 2008 was preceded by the crises of 2007: the subprime mortgage crisis, the corporate credit crunch, and the "quant liquidity crunch." The evolution of these crises appears to have resulted from a set of "deleveraging" that started in the subprime mortgage market but then spilled over into a number of other asset markets and resulted in large premiums in multiple markets. To respond to these events, new proprietary factors have been deployed that are not vulnerable to the actions of others. These factors have performed, and continue to perform, well during the financial crisis.
Source: CFA Institute Conference Proceedings Quarterly
Daniel, Kent. "Anatomy of a Crisis." CFA Institute Conference Proceedings Quarterly 26, no. 3 (2009): 11-21.