Standard & Poor’s maintained its ranking as the top rating service in the MBS and ABS market in 2010, according to a new Inside MBS & ABS ranking and analysis. S&P rated 78 percent of the non-agency MBS issued last year, up sharply from its 51 percent share back in 2009. While total non-agency MBS production rose by just 5 percent in 2010, S&P’s business increased 63 percent, the largest increase in... [Includes one data chart]