Sarah Robertson is the film’s tragic intellectual. She is neither a villain (like Tuld) nor a naïve hero (like Peter). She is the professional who did her job correctly, warned appropriately, and was then rendered obsolete by a system that values speed and survival over accuracy and ethics. Her character serves as a quiet indictment of how Wall Street structurally neuters its own safety mechanisms.

: Robertson is heavily implied to be the one who orchestrated the unceremonious firing of Eric Dale (Stanley Tucci), the risk manager who first discovered the mathematical formula’s failure. By "shooting the messenger," she attempted to buy time for the firm, but ultimately only succeeded in isolating herself.