Complex sentence: FERC again declines to decide on the deal saying that Dynegy's study showed it charging market rates for energy in the Midwest, with FERC worrying that transmission bottlenecks in the area would permit Dynegy to charge much more.
Split into simpler sentences: FERC again declines to decide on the deal saying that it Dynegy's study showed it charging market rates for energy in the Midwest. But FERC said it worried that transmission bottlenecks in the area would permit Dynegy to charge much more.