-미국 BBB등급 회사채 가산금리 https://fred.stlouisfed.org/series/BAMLC0A4CBBB ICE BofA BBB US Corporate Index Option-Adjusted Spread Source: Ice Data Indices, LLC Release: ICE BofA Indices Units: Percent, Not Seasonally Adjusted Frequency: Daily, Close Notes: This data represents the Option-Adjusted Spread (OAS) of the ICE BofA BBB US Corporate Index, a subset of the ICE BofA fred.stlouisfed.org -미국 BB등급 회..