Answer:
This TIME TRAVELER superpower to stop time.
Step-by-step explanation:
Since this HEROES TV series where Hiro Nakamura character can travel through time (backward and forward) and even stop it, I would gladly give Nick Carraway that time traveling superpower or Clairvoyance in order to bond trade dynamic and millionaire stock transactions to propel him to the top of the stock market in advance so that he could foresee what would the stock market behavior and fluctuations before their competitors to get the most profit out of it for him and his on-the counter anonymous buyers and sellers.