During a portfolio review, Lisa, a senior investment analyst, is examining the credit risk exposure of her firm's fixed-income holdings. She focuses particularly on the credit ratings assigned to the bonds in her portfolio and is keen on understanding the implications of credit rating changes. Lisa recalls recent news where a major credit rating agency downgraded several corporate bonds in the energy sector due to rising debt levels and declining revenues.
Lisa is particularly interested in assessing how such changes in credit ratings might impact the overall risk profile of her portfolio and the potential for defaults in the bonds held. In addition, Lisa wants to consider the relationship between bond ratings and interest rate sensitivity in managing credit risk.