I sing in a choir http://www.videogameconsolelibrary.com/blog/?p=do-my-algebra-homework-for-me do my paper OppenheimerFunds' Rochester municipal bond funds have beenamong the most aggressive in the industry with their heavyconcentration of Puerto Rico debt. The $69 million OppenheimerRochester Massachusetts Municipal Fund, for example,has nearly 17 percent of its assets in Puerto Rico debt,according to Lipper Inc, a unit of Thomson Reuters.