By Hal Dardick and Juan Perez, includes "… Emanuel this past week quietly proposed a change to city investment rules that would allow the city to buy debt from so-called sister agencies, including CPS, no matter the creditworthiness of that debt. … More ominously, government agencies in Puerto Rico … have lent money to each other, said Matt Fabian … "In Puerto Rico, it allowed things to go on much longer and get much worse than otherwise," he said…"