I will talk first about programs aimed at conditions in specific markets and the responses of those markets. I will then move to a discussion of credit aggregates more generally.
I will use  1  Losses on Lehman Brothers' debt securities that resulted from the investment bank's bankruptcy caused one money market mutual fund to "break the buck," with others also rumored to do so. This situation led to a rapid escalation in money market mutual fund outflows such that short-term funding markets for businesses and municipalities essentially froze.