Average Credit Rating is the weighted average credit quality of all bonds in a debt fund's portfolio — a single number summarising the overall credit risk profile.
Average Credit Rating is calculated by assigning numerical scores to each credit rating (AAA = 1, AA+ = 2, AA = 3, etc.) and computing the weighted average based on portfolio weights. A portfolio with 70% in AAA bonds and 30% in AA bonds has a weighted average closer to AAA. Many fund rating platforms (Morningstar, Value Research) display this as a letter rating for the overall portfolio. It complements the YTM and Modified Duration in forming the complete debt fund risk profile.
Average Credit Rating condenses all the individual bond ratings in a debt fund into a single answer: 'Overall, how trustworthy are the borrowers in this fund?' A fund with Average Credit Rating of AAA is lending to the best companies. A fund with average rating of AA or lower is taking meaningful credit risk. Compare the average credit rating across similar debt funds — the higher YTM fund with a lower average credit rating is the riskier option.
Assign numeric scores: AAA=1, AA+=2, AA=3, AA–=4, A+=5, A=6...
Weighted average = Σ (weight of bond × numeric score).
Convert back to a rating letter for display.
Most platforms compute and display this automatically in the fund's profile.