بررسی اوراق بهادار ساختاری ارشد اوراق بهادار ارزی

In much of the research with respect to the use of credit ratings, the notion of rating shopping features prominently. One form of rating shopping predicts that investors price the risk that arises when securities have fewer than three ratings. Inconsistent with what rating shopping would predict, our study shows that for the largest European structured finance market, the triple A sector of the senior European residential mortgage-backed market prior to 2007, investors demanded a premium for more ratings. Moreover, we find that certain characteristics unique to structured finance securities that investors perceive as complex, determine whether issuers opt for a higher number of triple A ratings.