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:2021-10-18, Stock:RIO, The news for the past five days is as follows:
2021-10-11: NEWS1: Dow Falls, Oil Prices Rally—and What Else Is Happening in the Stock Market Today.NEWS2: Dow Rises, Alibaba Stock and Oil Prices Fly—and What Else Is Happening in the Stock Market Today.NEWS3: Dow Set to Slip, Alibaba Stock and Oil Prices Fly—and What Else Is Happening in the Stock Market Today.NEWS4: Rio Tinto’s Perth Airport vaccination clinics opens for mining industry.
2021-10-12: nan
2021-10-13: NEWS1: Rio Tinto targets low-carbon steel production with new technology.NEWS2: Is WisdomTree Global exU.S. Quality Dividend Growth ETF (DNL) a Strong ETF Right Now?.
2021-10-14: NEWS1: Rio Tinto cuts 2021 iron ore shipments forecast on labour squeeze.NEWS2: Rio Tinto releases third quarter production results.NEWS3: A new 'megacycle' may send shares of this dirt-moving equipment maker up 25%: analyst.NEWS4: Why higher commodity prices are good for Caterpillar.NEWS5: Rio Tinto expands Pilbara presence with new Karratha Hub.
2021-10-15: NEWS1: Metals Surge as the Energy Crisis Knocks Out More Supply.NEWS2: Rio Tinto downgrades production after labour shortages in Australia.

Answer: Decrease