where I can find new issuance data? thank you

I’m trying to find what’s the % of BBB-rated debt issuance starting from 1990s, where should I go? I mean if the whole debt issuance is 100% in that year, XXX% is treasury, XXX% is AAA, I’m looking for BBB-rated weight. Thank you a lot.

Do you have access to Factset or Bloomberg? There’s a reason they make money on data

Yes, but what key word I should type in Bloomberg? The Help Desk doesn’t know how to research