JPMorgan Chase and institutional investors BlackRock and State Street Global Advisors announced Thursday that they are quitting or, in the case of BlackRock, substantially scaling back involvement in a massive United Nations climate alliance formed to combat global warming through corporate sustainability agreements. In a statement, the New York-based JPMorgan Chase explained that it would exit the so-called Climate Action 100+ investor group because of the expansion of its in-house sustainability team and the establishment of its climate risk framework in recent years. BlackRock and State Street, which both manage trillions of dollars in assets, said the alliance's climate initiatives...