Figure 1.
The image displays four line graphs arranged in a two by two grid, each representing different time series data over various weeks from 2019 to 2023. The top left graph is labelled digital G S V I and shows fluctuations around a baseline, with values ranging approximately from negative 0.15 to positive 0.15. The top right graph is labelled return V N Index and fluctuates within a wider range, extending from negative 2 to approximately positive 7. The bottom left graph is labelled return V N 30 and shows value fluctuations within a range similar to digital G S V I. The bottom right graph is labelled return V N 100 and remains largely within a range of negative 3 to positive 3. The horizontal axis represents time segmented into weeks from 2019 W 41 to 2023 W 42, and each vertical axis shows the corresponding variable values.Movement of variables
Source: the authors