Fig. 1
From: Can news-based economic sentiment predict bubbles in precious metal markets?
Bubbles and crisis periods in precious metal prices, GSADF test. Notes: The solid lines are the price of the precious metal commodity, and the green-shaded areas indicate bubble periods. The shaded areas are identified when the BSADF statistic exceeds the corresponding 95% bootstrapped critical value. The 95% bootstrapped critical values are obtained from 999 bootstrap replications