In contrast, the vulnerabilities associated with a crisis are preexisting features of the financial system that amplify and propagate the initial shocks. Examples of vulnerabilities include high levels of leverage, maturity transformation, interconnectedness, and complexity, all of which have the potential to magnify shocks to the financial system.
Absent vulnerabilities, triggers might produce sizable losses to certain firms, investors, or asset classes but would generally not lead to full-blown financial crises; the collapse of the relatively small market for subprime mortgages, for example, would not have been nearly as consequential without preexisting fragilities in securitization practices and short-term funding markets which greatly increased its impact.