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Agenzie sotto accusa
L'aumento dei casi di insolvenza nel mercato statunitense dei mutui subprime ha innescato una valanga di declassamenti. La fiducia nelle valutazioni espresse dalle agenzie di rating ne ha immediatamente risentito e le agenzie sono ora sotto il fuoco incrociato di investitori e autorità di regolamentazione. Ma si tratta di critiche giustificate?
![huertas-1007-gif huertas-1007-gif](/sites/default/files/styles/landscape_750_463/public/import/IMG/470/79470/huertas-1007-gif1518-580x358.gif.webp?itok=OP3bIMHG)
Mark Pengelly
Le agenzie di rating sono sotto accusa. Il netto aumento dei casi di insolvenza dei mutui subprime negli Stati Uniti ha innescato, a partire da luglio, tutta una serie di rating action con il successivo declassamento o messa sotto osservazione di centinaia di titoli garantiti da mutui residenziali (RMBS) e di CDO di ABS - comprese alcune tranche con rating AAA. Tali interventi hanno inferto un duro colpo alla credibilità dei rating, e indotto le autorità di regolamentazione ad
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