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:2018-11-23, Stock:RIO, The news for the past five days is as follows:
2018-11-15: NEWS1: What Really Changed for Alcoa after Trump’s Tariffs?.NEWS2: Pan American Silver Corp. (PAAS) Ex-Dividend Date Scheduled for November 16, 2018.NEWS3: Pan American Silver Corp. (PAAS) Ex-Dividend Date Scheduled for November 16, 2018.
2018-11-16: nan
2018-11-19: NEWS1: JD.com falls short, new GE problems, Rio Tinto focuses on coffee.NEWS2: Is There More Heat Left in Freeport-McMoRan’s Rally?.NEWS3: PRESS DIGEST- Financial Times - Nov 19.
2018-11-20: NEWS1: Asian Markets Extend Losses.NEWS2: Asian Markets Extend Losses.NEWS3: Australian Market Extends Losing Streak.NEWS4: Australian Market Extends Losing Streak.NEWS5: 3 Mining Companies With High Earnings Yields.NEWS6: Freeport-McMoRan: Uncertainty Remains.
2018-11-21: nan

Answer: Decrease