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:2019-01-22, Stock:RIO, The news for the past five days is as follows:
2019-01-14: NEWS1: Asian Markets Higher Ahead Of Brexit Vote.NEWS2: Asian Markets Higher Ahead Of Brexit Vote.NEWS3: Australian Market Modestly Higher.NEWS4: Australian Market Modestly Higher.NEWS5: Alcoa Stock: Analysts Might Be a Little Too Optimistic.NEWS6: Alcoa: 2019 Might Be the Real Test.NEWS7: Lab-grown diamonds will survive Big Diamond’s attempt to kill them, startup says.NEWS8: [$$] Rio Tinto Declares Force Majeure on Some Iron-ore Contracts After Fire.
2019-01-15: NEWS1: Asian Markets Mixed After Brexit Deal Defeat.NEWS2: Asian Markets Mixed After Brexit Deal Defeat.NEWS3: Mining’s Biggest Jobs Are Up for Grabs. Here Are the Contenders.NEWS4: Australian Market Modestly Higher In Choppy Trade.NEWS5: Australian Market Modestly Higher In Choppy Trade.
2019-01-16: NEWS1: Asian Markets Mostly Higher With Modest Gains.NEWS2: Asian Markets Mostly Higher With Modest Gains.NEWS3: Australian Market Extends Gains.NEWS4: Australian Market Extends Gains.NEWS5: Asian Shares Mostly Higher Despite Brexit Blues.NEWS6: Asian Shares Mostly Higher Despite Brexit Blues.
2019-01-17: NEWS1: Rio Tinto's 2019 iron ore guidance at lower end of forecasts.NEWS2: Rio Tinto Q4 Iron Ore Shipments Down 3%.NEWS3: Rio Tinto Q4 Iron Ore Shipments Down 3%.NEWS4: Alcoa: Strong Q4 Numbers Can’t Hide Its Weakness.
2019-01-18: NEWS1: Walmart and CVS ink a deal, American Express falls short, Apple partners with pharma giant.NEWS2: Walmart and CVS ink a deal, American Express falls short, Apple partners with pharma giant.NEWS3: [$$] Rio Tinto flags up shareholder returns as it points to ‘solid’ quarter.NEWS4: [$$] Rio Tinto Shipments Rise.NEWS5: Rio Tinto's 2019 iron ore guidance at lower end of forecasts.

Answer: Decrease