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:2018-12-21, Stock:NGG, The news for the past five days is as follows:
2018-12-14: NEWS1: 8 Safe Stocks to Buy as Wall Street Goes Defensive.NEWS2: 8 Safe Stocks to Buy as Wall Street Goes Defensive.NEWS3: Have Insiders Been Buying National Grid plc (LON:NG.) Shares This Year?.
2018-12-17: NEWS1: Utilities: Movers and Shakers Last Week.
2018-12-18: NEWS1: NGG Crosses Critical Technical Indicator.NEWS2: NGG Crosses Critical Technical Indicator.NEWS3: European Markets Finished Lower In Cautious Trade.NEWS4: European Markets Finished Lower In Cautious Trade.NEWS5: [$$] National Grid Hits Out at Ofgem Over Consultation Paper.NEWS6: European Shares Extend Losses On Growth Concerns.NEWS7: European Shares Extend Losses On Growth Concerns.NEWS8: FTSE 100 Down 50 Points As Oil Extends Losses.NEWS9: FTSE 100 Down 50 Points As Oil Extends Losses.NEWS10: National Grid To Provide Response To Ofgem Consultation Documents In Early 2019.NEWS11: National Grid To Provide Response To Ofgem Consultation Documents In Early 2019.
2018-12-19: NEWS1: National Grid Statement on Northeast And Mid-Atlantic Jurisdictions' Commitment to Develop Cleaner Transportation.
2018-12-20: nan

Answer: Decrease