Oil prices around the world have fallen more than 37 percent since the year’s high in June. Among the winners are airlines, which are saving on fuel and not reducing fares for customers. Bank of America Corp. predicts earnings will gain 73 percent in 2015. Saudi Arabia flexed its muscle at November’s OPEC meeting by overruling other members, showing that it’s still the dominant producer. The desert kingdom needs oil at $83.60 a barrel to balance its budget, according to the International Monetary Fund, but it’s got $736 billion banked up. Apollo Global Management LLC, the New York buyout firm run by billionaire Leon Black, announced the sale of shale driller Athlon Energy Inc. on Sept. 29 — before oil dropped 29 percent. American motorists: $3 gas ? $2 gas! Pierre Andurand , the 37-year-old London hedge fund manager, piled up an 18 percent gain in November betting against […]