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:2018-12-24, Stock:RIO, The news for the past five days is as follows:
2018-12-17: NEWS1: Should You Buy Rio Tinto plc (RIO)?.NEWS2: Does Rio Tinto plc’s (LON:RIO) P/E Ratio Signal A Buying Opportunity?.
2018-12-18: NEWS1: Asian Markets Mostly Higher Ahead Of Fed Decision.NEWS2: Asian Markets Mostly Higher Ahead Of Fed Decision.NEWS3: Australian Market Extends Losses.NEWS4: Australian Market Extends Losses.NEWS5: This Odd Couple Plots to Save $100 Billion Gold Mining Business.
2018-12-19: NEWS1: Asian Markets Mostly Lower After Fed Raises Rates.NEWS2: Asian Markets Mostly Lower After Fed Raises Rates.NEWS3: Australian Market Pares Losses.NEWS4: Australian Market Pares Losses.NEWS5: Mining Stocks Look Dead unless China Stabilizes.NEWS6: Is Freeport-McMoRan Worth a Look Now?.NEWS7: Alcoa To Curtail Half Of One Operating Potline At BÃ©cancour Aluminum Smelter.NEWS8: Alcoa To Curtail Half Of One Operating Potline At BÃ©cancour Aluminum Smelter.
2018-12-20: NEWS1: Miners Are Budgeting for a Recovery in Copper.NEWS2: Miners Are Budgeting for a Recovery in Copper.NEWS3: Freeport-McMoRan: Is the Worst Over?.NEWS4: Scania Trialling New Autonomous Technology In Trucks At Rio Tinto's Mining Site.NEWS5: Scania Trialling New Autonomous Technology In Trucks At Rio Tinto's Mining Site.
2018-12-21: nan

Answer: Decrease