An exchange traded debt sell off?

According to Quantomonline, there are 119 debt securities that are listed on the stock exchanges. I have put their ticker symbols below.

It seems as if there was a sell-off in the exchange traded debt of various securities yesterday, starting sometime around 10 am. AIG, Comcast, CBS, ING, AT&T - financial/non-financial debt all sold off. Someone must be liquidiating.

Now I know inflation is heating up and all these long duration bonds are most sensitive to interest rate changes. But how can one explain that AFE - AIG's senior unsecured debentures maturing in 2034 - are yielding 12%, while its 6-1/4 senior unsecured bonds maturing in 2036 are yielding 7.2%. Even its 2067 bonds are yielding 8.7%. Or for that matter - CCS, CCT and CCW - all Comcast unsecured bonds maturing somewhere around 2055 have different yields. CCS is yielding 8.7% and CCT and CCW are yielding 8.3%, while its 2038 bonds are yielding 7%.

Here is the list to make the portfolio on yahoo or google finance.

AAR ABA AEP-A AFC AFE AFF AKF AKT ALF ALQ ALZ ATT AVF AZM BGM CCS CCT CCW CEG-A CPV CRP CSB DFP DFY EHA EHB EHL EMO EMQ F-A FCJ FCY FCZ FGC FGE FSB FSE GAH GAJ GAR GBM GEA GEC GED GEG GEJ GEP GER GFW GFZ GJM GKM GMA GMS GMW GOM GPD GPJ GPM GPU GPW GRM GUL GUQ GXM HGM HTB HTN IJD IKJ IKL IKM IKR IND INZ ISG ISP LNC-G MLG MPJ NRC NRN NRU NXY-B OUI PFK PFX PHA PLV PMK POH PRD RBV RGM SBCKP SVJ XGM SGZ JSM ISM OSM TDI TDA TVE TVC UDM UZV UZG VNV WRS XCJ