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:2021-10-21, Stock:RIO, The news for the past five days is as follows:
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.
2021-10-18: NEWS1: Rio Tinto Executive changes.NEWS2: Billionaire Ken Fisher’s Top 10 Dividend Stock Picks.NEWS3: Rio Tinto Statement on Joint Standing Committee on Northern Australia Report.
2021-10-19: nan
2021-10-20: NEWS1: Iron Rout Has Vale Cutting Back After Bumper Third Quarter.NEWS2: Rio Tinto announces bold $7.5 billion spend to halve carbon emissions by 2030; shares fall.NEWS3: Rio Tinto to strengthen performance, decarbonise and grow.

Answer: Decrease