Connecticut, eight states, the City of New York and environmental groups sued AEP, Duke Energy, Cinergy, the Southern Co. and Xcel Energy to win court-ordered caps on CO2 emissions.

FORBES: Big Day For Big Cases At The Supreme Court

Among the largest underlying components of DLN, in trading today Duke Energy Corp ( NYSE: DUK) is off about 0.8%, Boeing Co. ( NYSE: BA) is up about 1.8%, and United Parcel Service Inc ( NYSE: UPS) is up by about 1.8%.

FORBES: Noteworthy ETF Inflows: DLN, DUK, BA, UPS