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:2021-04-21, Stock:RIO, The news for the past five days is as follows:
2021-04-14: nan
2021-04-15: NEWS1: 4 Stocks to Watch as Copper Trends Above $4 Per Pound.
2021-04-16: NEWS1: The Zacks Analyst Blog Highlights: BHP Group, Rio Tinto, Southern Copper and Freeport-McMoRan.
2021-04-19: NEWS1: Rio Tinto releases first quarter production results.NEWS2: Turquoise Hill's Oyu Tolgoi mine partially resumes shipments to China.NEWS3: Rio Tinto, IBD Stock Of The Day, Sets Up Amid Mining Stocks Boom.NEWS4: Rio Tinto Stock Rides Mining Boom, Reflected In A Rising RS Rating.NEWS5: Rio Tinto Carves Out Cup Base.NEWS6: TIMELINE-Rio Tinto's 26-year struggle to develop a massive Arizona copper mine.NEWS7: Is iShares MSCI Intl Multifactor ETF (INTF) a Strong ETF Right Now?.NEWS8: INSIGHT-Arizona mining fight pits economy, EVs against conservation, culture.
2021-04-20: NEWS1: IBD Screen Of The Day: Which Stocks Are Funds Buying In A Volatile Stock Market?.NEWS2: Iron Ore Giants Challenged in Race to Meet China Demand.NEWS3: Do Institutions Own Rio Tinto Group (LON:RIO) Shares?.

Answer: Rise