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:2018-12-28, Stock:RIO, The news for the past five days is as follows:
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
2018-12-24: NEWS1: Rio Tinto plans to list Canadian iron ore unit in early 2019 - sources.NEWS2: BRIEF-Minmentals Development's Unit To Sign Iron Ore Procurement Agreement With Rio Tinto Commercial.
2018-12-26: NEWS1: Barrick Gold Corporation (ABX) Ex-Dividend Date Scheduled for December 27, 2018.NEWS2: Barrick Gold Corporation (ABX) Ex-Dividend Date Scheduled for December 27, 2018.NEWS3: Yamana Gold Inc. (AUY) Ex-Dividend Date Scheduled for December 27, 2018.NEWS4: Yamana Gold Inc. (AUY) Ex-Dividend Date Scheduled for December 27, 2018.NEWS5: Randgold Resources Limited (GOLD) Ex-Dividend Date Scheduled for December 27, 2018.NEWS6: Randgold Resources Limited (GOLD) Ex-Dividend Date Scheduled for December 27, 2018.
2018-12-27: NEWS1: Kirkland Lake Gold Ltd. (KL) Ex-Dividend Date Scheduled for December 28, 2018.NEWS2: Kirkland Lake Gold Ltd. (KL) Ex-Dividend Date Scheduled for December 28, 2018.NEWS3: Osisko Gold Royalties Ltd (OR) Ex-Dividend Date Scheduled for December 28, 2018.NEWS4: Osisko Gold Royalties Ltd (OR) Ex-Dividend Date Scheduled for December 28, 2018.

Answer: Decrease