How to update probabilities

arima
time_series

#1

I am working on time series data. I am using ARIMA modelling to forecast future outcomes. I am using stock returns as data points, We calculate probability of certain outcome during number of days.

If we fit the model on day n and save it. As soon as new data comes in how to forecast future outcome. Is there any way to forecast without retraining?


#2

Hi @pooja16,

You can use the forecast function of ARIMA to get the predictions. While if you want to include the new data for making further predictions, you have to retrain the model.