Credit rating agencies appear to be more generous in rating structured finance products over other bond types because they tend to bring in more revenue, according to a recent study by academics. Researchers at Indiana University, American University and Rice University said that, contrary to assertions by the top credit rating agencies, asset classes are not equal when it comes to ratings. The study “Credit Ratings Across Asset Classes: A=A?” claims there is overwhelming evidence that structured products, such as MBS, receive significantly higher, more optimistic ratings than those assigned to bonds issued by...