Another former Appaloosa Management executive is striking out on his own.Aaron Weitman, both a nephew and protege of Appaloosa chief David Tepper, has penciled in July 1 to launch the debut fund from his CastleKnight Management. He is expected to start with at least $100 million, including an undisclosed contribution from Tepper.CastleKnight would employ event-driven and special-situations strategies, using fundamental analysis to invest across...