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:2019-02-28, Stock:RIO, The news for the past five days is as follows:
2019-02-21: nan
2019-02-22: NEWS1: Will copper’s revival last? China is the X-factor.NEWS2: Top Ranked Income Stocks to Buy for February 22nd.NEWS3: Top Ranked Income Stocks to Buy for February 22nd.NEWS4: Top Ranked Income Stocks to Buy for February 22nd.
2019-02-25: NEWS1: Analyzing Alcoa’s 2019 Outlook.NEWS2: Is Alcoa Undervalued like Analysts’ Estimates Suggest?.NEWS3: Should You Expect More Gains from Alcoa in 2019?.NEWS4: Mining Billionaire Ends Bitter Guinea Dispute After Months of Secret Negotiations.NEWS5: [$$] Beny Steinmetz and Mick Davis eye Guinea’s iron potential.NEWS6: [$$] Beny Steinmetz ends iron ore dispute with Guinea.
2019-02-26: NEWS1: Top Ranked Income Stocks to Buy for February 26th.NEWS2: Top Ranked Income Stocks to Buy for February 26th.NEWS3: The Zacks Analyst Blog Highlights: Boeing, GlaxoSmithKline and Rio Tinto.NEWS4: The Zacks Analyst Blog Highlights: Boeing, GlaxoSmithKline and Rio Tinto.NEWS5: Royal Gold Inks Deal With Cupric to Acquire Silver Stream.NEWS6: Royal Gold Inks Deal With Cupric to Acquire Silver Stream.NEWS7: Top Ranked Income Stocks to Buy for February 26th.NEWS8: The Zacks Analyst Blog Highlights: Boeing, GlaxoSmithKline and Rio Tinto.NEWS9: Royal Gold Inks Deal With Cupric to Acquire Silver Stream.
2019-02-27: NEWS1: Rio Tinto (RIO) Q4 2018 Earnings Conference Call Transcript.NEWS2: Rio Tinto (RIO) Q4 2018 Earnings Conference Call Transcript.NEWS3: Rio Tinto (RIO) Q4 2018 Earnings Conference Call Transcript.NEWS4: Rio Tinto Returns Record $13.5 Billion to Shareholders in 2018.NEWS5: Agnico Eagle Mines Limited (AEM) Ex-Dividend Date Scheduled for February 28, 2019.NEWS6: Agnico Eagle Mines Limited (AEM) Ex-Dividend Date Scheduled for February 28, 2019.NEWS7: Moving Average Crossover Alert: Rio Tinto.NEWS8: Moving Average Crossover Alert: Rio Tinto.NEWS9: Stocks making the biggest moves premarket: Lowe's, Best Buy, Weight Watchers, Office Depot & more.NEWS10: Moving Average Crossover Alert: Rio Tinto.NEWS11: [$$] European Equities Market Talk Roundup.NEWS12: Rio Tinto hands investors surprise $4bn payout after earnings hit high.NEWS13: [$$] Rio Tinto Offers Record Returns as Miners Shower Investors With Cash.NEWS14: [$$] Rio Tinto's Green Growth Dilemma.NEWS15: Rio Tinto posts best underlying earnings in four years, offloads cash.NEWS16: [$$] Rio Tinto to Pay Special Dividend as Profit Jumps.NEWS17: [$$] Rio Tinto shareholders in line for $4bn payday.NEWS18: [$$] Rio Tinto announces $4bn special dividend.

Answer: Decrease