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:2018-01-19, Stock:RIO, The news for the past five days is as follows:
2018-01-11: NEWS1: Alcoa’s 4Q17 Revenues: What’s the Word on Wall Street?.NEWS2: Should Chinese Steel Industry Concern Teck Resources?.NEWS3: Could Analysts Turn Bullish on Freeport-McMoRan This Year?.NEWS4: Could Freeport-McMoRan Reinstate Its Dividend in 2018?.NEWS5: How the Grasberg Divestment Could Impact Freeport-McMoRan.NEWS6: Indonesia hopes to finalise Freeport contract talks by June.NEWS7: Australia's Port Hedland clearing out ships as Cyclone Joyce intensifies.NEWS8: Rio Is Said to Drop Chase for $5 Billion Lithium Miner Stake.NEWS9: Rio Is Said to Drop Pursuit of $5 Billion Stake in Lithium Miner.
2018-01-12: NEWS1: How Wall Street Sees Alcoa ahead of Its 4Q17 Earnings.NEWS2: Energy Sector Update for 01/12/2018: XOM, CVX, COP, SLB, OXY, USO, UNG, RIO, BP, RDS.A.NEWS3: Energy Sector Update for 01/12/2018: XOM, CVX, COP, SLB, OXY, USO, UNG, RIO, BP, RDS.A.NEWS4: What Markets Would Like to Hear on Alcoa’s 4Q17 Earnings Call.NEWS5: Teck Resources’ Valuation: Is There Scope for Multiple Expansion?.NEWS6: Indonesia in talks with Rio Tinto for Freeport acquisition - official.
2018-01-16: NEWS1: Why Did JPMorgan Recently Downgrade Rio Tinto?.NEWS2: Vale Poised to Gain From Iron-Ore Price Rise Amid Headwinds.NEWS3: Vale Poised to Gain From Iron-Ore Price Rise Amid Headwinds.NEWS4: Miners: Getting Too Pricey?.NEWS5: Rio Tinto Gets First Copper From Giant Mine Since 2014.NEWS6: Rio Tinto targets modest hike in 2018 iron ore shipments.NEWS7: Will 2018 Be Alcoa Inc.'s Best Year Yet?.NEWS8: Will 2018 Be Alcoa Inc.'s Best Year Yet?.
2018-01-17: NEWS1: These Factors Are Affecting Vale SA’s Earnings Estimates.NEWS2: What to Expect from Cleveland-Cliffs’ Asia-Pacific Segment.NEWS3: Why Analysts’ Optimism for Vale SA Has Increased in Recent Months.NEWS4: Why Analysts Expect a Strong Pickup in Rio Tinto’s Margins.NEWS5: Rio Tinto says U.S. SEC fraud case should be dismissed.
2018-01-18: NEWS1: HudBay Minerals (HBM) and ArcelorMittal (MT) are Aggressive Growth Rank Buys.NEWS2: BHP Billiton's (BHP) Iron-Ore Output Flat Y/Y in 1H FY18.NEWS3: BHP Billiton's (BHP) Iron-Ore Output Flat Y/Y in 1H FY18.NEWS4: Look Out for These Valuation Catalysts for Iron Ore in 2018.NEWS5: BHP Billiton&apos;s (BHP) Iron-Ore Output Flat Y/Y in 1H FY18.NEWS6: 4 Reasons Alcoa Missed Its 4Q17 Earnings Estimates.NEWS7: Is the Pullback in Iron Ore Miners Based on Technical Indicators?.NEWS8: How Analysts View Cleveland-Cliffs’ Earnings for 2017 and Beyond.NEWS9: Top Stocks in Mining.NEWS10: Top Stocks in Mining.NEWS11: Why Alcoa’s 2018 Guidance Miffed Analysts.

Answer: Decrease