Quanto sicuri sono i rating?
Il dibattito sull'accuratezza dei rating assegnati ai prodotti di credito strutturato ha fatto emergere dei dubbi sul trattamento delle cartolarizzazioni in Basilea 2. Luca Giaccherini e Giovanni Pepe della Banca d'Italia valutano l'affidabilità della metodologia di Basilea 2
La credibilità delle agenzie di rating è stata messa in discussione dalla recente crisi creditizia. In particolare, l'ondata di rapidi ed ampi declassamenti, il prosciugamento della liquidità e i bruschi cali delle valutazioni hanno sollevato dubbi sull'efficacia dei rating quali strumento di valutazione dei rischi associati ai prodotti di credito strutturato.
Per le autorità di vigilanza, il campanello d'allarme ha implicazioni più profonde. Le regole sulla cartolarizzazione di Basilea 2
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