        # :param date: datetime object
        # :param prices: list of Price objects
        # :param fx: and FX object
        self.date = date
        self.prices = prices
        self.fx = fx
        self.divs = divs
        self.curves = curves
        self.surfaces = surfaces
    
    def simulate(self, shock: pd.Series):
        new_env = deepcopy(self)