【正文】
ings change? ? Do raters disagree? ? Prudent investment guidelines 169。 The McGrawHill Companies, Inc., 2022 Irwin/McGrawHill 1120 Corporate Bond Credit Ratings Mo o d y39。 s D u ff amp。 Ph e lp s Samp。 P39。 s C re d it R a ti n g D e sc ri p ti o nIn ve stm e n t Gra d e B o n d R a ti n g sAa a 1 AAA Hi ghe s t c re di t r a ting , m a x im ums a fe tyAa 1 2 AA+Aa 2 3 AA Hi gh c re di t qu a l ity , in v e s tme ntgr a de b ond sAa 3 4 AAA1 5 A+A2 6 A Upp e rm e di um q ua li ty ,in v e s tme nt g r a de b ond sA3 7 ABa a 1 8 BBB+Ba a 2 9 BBB Low e rm e di um q ua l ity ,in v e s tme nt g r a de b ond sBa a 3 10 BBBSp e c u la ti ve Gra d e B o n d R a ti n g sBa 1 11 BB+ Low c re di t qu a li ty , s pe c ul a tiv e gr a de b ond sBa 2 12 BBBa 3 13 BBB1 14 B+ V e ry lo w c r e di t qu a li ty ,s pe c ul a tiv e gra d e b ond sB2 15 BB3 16 BEx tr e m e ly Sp e c u la ti ve Gra d e B o n d R a ti n g sCa a 17 CCC+ E x tre m e ly l ow c re d it s ta ndi ng,hi ghr is k b ond sCCCCCCCa CC E x tre m e ly s p e c ul a tiv eC CD Bon ds i n de fa ul t169。 The McGrawHill Companies, Inc., 2022 Irwin/McGrawHill 1121 Junk bonds ? Highyield bonds ? Original issue junk possibly not rated ? Fallen angels rated ? Current status of junk bond market ? private placement ? Yield premiums versus default risk 169。 The McGrawHill Companies, Inc., 2022 Irwin/McGrawHill 1122 Bond Market Trading ? Active secondary market ? NYSE ? OTC ? New York Exchange Bonds ? Current yield ? cv ? f ? zr