FSD I am really bad at this but I believe the ABX indicators are as follows…
The rating of the security is on the left… The numbers on the far right are at least to me the most telling. Look at the last 3 entries of the first row for instance….
90.63 99.33 90.63
So I believe the 90.63 represents the last bid and ask for that particular security. (Someone please correct me as I am way over my head here)
If you look at some of the BBB securities you see that there are some SERIOUSLY low entries, one as low as 35.14.
I am just an engineer/realtor so sorry for not being able to explain this better.