Based on the news about the stock in the past five trading days, please predict the rise or fall of the stock in the next trading day. If the stock is predicted to rise in the next trading day, please output [Rise], if the stock is predicted to fall in the next trading day, please output [Decrease].

Date:2021-09-09, Stock:NGG, The news for the past five days is as follows:
2021-09-01: NEWS1: UK competition watchdog clears National Grid acquisition of WPD.NEWS2: UPDATE 1-UK competition regulator clears National Grid's $11 bln purchase of WPD.NEWS3: UK competition regulator clears National Grid's $11 bln purchase of WPD.
2021-09-02: nan
2021-09-03: nan
2021-09-07: NEWS1: UK M&A deals continue to rebound after pandemic.
2021-09-08: nan

Answer: Decrease