The question is exactly how it sounds: is murder allowed if it is for the purpose of profit in Ferengi law?
For most of Star Trek: Deep Space Nine, the Ferengi culture is entirely based in profit, with the Rules of Acquisition serving as their constitution. I don't remember every rule, but I know that the Rules of Acquisition encourage (metaphorically) treading on others to gain profit. I also know that in the first season on DS9, Rom attempts to kill Quark for the sake of profit, and it doesn't seem like any charges were filed. Does this indicate the legality of murder in profit-based situations?