I'm trying to get next year EPS estimate from Morningstar fundamental data. It should be as easy as multiplying forward_earning_yield by price. But I don't know what price is used in the calculation. Is it daily close? In the attached notebook I am using both open and close price to get EPS estimate for Apple. Regardless of the price used, the EPS estimate time series is erratic, whereas I expected to see something much more stable and slowly changing. Is it really updated every day or I am doing something wrong?