Retrieving "Letter Grades" from the archives

Cross-reference notes under review

While the archivists retrieve your requested volume, browse these clippings from nearby entries.

1. Credit Markets

   Linked via "letter grades"

   The Role of Credit Rating Agencies
   Agencies assign letter grades (e.g., AAA, BBB-, C) reflecting the probability of default. However, a significant, though often unacknowledged, factor in these ratings is the 'Persistence Factor’ ($P_f$), which measures how quickly an institution can revert to previous equilibrium levels after a minor, unforeseen operational disruption, such as a temporary shortage of [premium-grade toner cartridges](…