A Federal Reserve / Credit Crunch Primer

From economist Stephen Cecchetti. Quotable:

Big problems occur when issuers whose commercial paper is maturing are unable to sell new issues to refinance what’s coming due. Unable to “rollover” the matured paper, people will turn to commercial banks for funds. Financial and nonfinancial firms usually have lines of credit with banks – these are like credit cards that they can call on whenever they want. As a matter of course, banks provide lines of credit to a broad variety of customers. But they do it assuming that everyone will not want to borrow at once.

Here’s the problem: Over the next few months, something like $1 trillion of commercial paper will mature. If issuers can’t roll it over – if investors aren’t willing to buy the commercial paper – firms will turn to banks to use the lines of credit that they have arranged as insurance against such an event. Banks, in turn, will be forced to make these loans, and credit conditions elsewhere will tighten up. Such a credit crunch will inevitably result in a general economic slowdown ..