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:2019-07-19, Stock:NGG, The news for the past five days is as follows:
2019-07-12: nan
2019-07-15: NEWS1: National Grid Completes Acquisition of Leading Renewable Energy Developer.
2019-07-16: NEWS1: National Grid (NGG) Buys Geronimo Energy for $100M, Signs JV.NEWS2: National Grid (NGG) Buys Geronimo Energy for $100M, Signs JV.NEWS3: National Grid (NGG) Buys Geronimo Energy for $100M, Signs JV.
2019-07-17: NEWS1: Should You Be Worried About National Grid plc's (LON:NG.) 7.8% Return On Equity?.
2019-07-18: nan

Answer: Decrease