Fig. 7From: A hybrid econometrics and machine learning based modeling of realized volatility of natural gasFinancial asset effects by models (standardized). Note The red area indicates the Brent effect, the purple area indicates the Euro effect, the blue area indicates the Gold effect, and the green area indicates the Standard and Poor’s 500 effect. The dark colors are the cases for HAR models, and the light colors for LSTMBack to article page