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:2018-12-21, Stock:CAT, The news for the past five days is as follows:
2018-12-14: NEWS1: Dow Drops Nearly 500 Points; S&P Marks Lowest Close in Months.NEWS2: Dow Drops Nearly 500 Points; S&P Marks Lowest Close in Months.NEWS3: It's Time to Take a Look at Caterpillar.NEWS4: Market Close Report: NASDAQ Composite index closes at 6,910.67 down -159.66 points.NEWS5: Market Close Report: NASDAQ Composite index closes at 6,910.67 down -159.66 points.NEWS6: Caterpillar Announces New Responsibilities for Officers and Appointment of New Vice President.NEWS7: Stock Market News For Dec 14, 2018.NEWS8: Stock Market News For Dec 14, 2018.NEWS9: Dow Movers: JNJ, JPM.NEWS10: Dow Movers: JNJ, JPM.NEWS11: Caterpillar gives its CEO the role of board chairman as well.NEWS12: Stock Market News For Dec 14, 2018.NEWS13: Caterpillar November Sales Up 16%, Lowest So Far This Year.NEWS14: [$$] Caterpillar Puts CEO Back in Charge of Board.
2018-12-17: NEWS1: Caterpillar (CAT) Stock Moves -1.81%: What You Should Know.NEWS2: Yahoo Finance Live:  Market Movers  Dec 18, 2018.
2018-12-18: NEWS1: Ferreycorp S.A.A. -- Moody's affirms Ferreycorp's Ba1 ratings, stable outlook.NEWS2: 15 Stocks Facing Big Political Risk in 2019.NEWS3: 15 Stocks Facing Big Political Risk in 2019.NEWS4: Time to Buy BA Stock on the Cheap After Boeing Dividend Hike?.NEWS5: Dow Analyst Moves: CAT.NEWS6: Dow Analyst Moves: CAT.NEWS7: Dow Movers: XOM, BA.NEWS8: Dow Movers: XOM, BA.NEWS9: Recent Analysis Shows MTS, Columbia Sportswear, First Data, Boingo Wireless, Lannett, and Caterpillar Market Influences — Renewed Outlook, Key Drivers of Growth.NEWS10: Caterpillar (CAT) Stock Moves -1.81%: What You Should Know.NEWS11: Caterpillar (CAT) Stock Moves -1.81%: What You Should Know.
2018-12-19: NEWS1: Dow Jones Eyes 700-Point Weekly Loss After Fed Rate Hike; Stock Market Leader Holds Firm.NEWS2: Stock News: Techs Fade After Fed Statement; Facebook Slammed Again.NEWS3: Stock News: Software Issues Boost Nasdaq, But FANG Stock Hit Hard Again.NEWS4: These infrastructure stocks could build up your portfolio in 2019.NEWS5: Dow Movers: AXP, CAT.NEWS6: Dow Movers: AXP, CAT.NEWS7: Ken Langone: The stock market is a 'casino'.NEWS8: Douglas Dynamics, Inc. (PLOW) Ex-Dividend Date Scheduled for December 20, 2018.NEWS9: Douglas Dynamics, Inc. (PLOW) Ex-Dividend Date Scheduled for December 20, 2018.NEWS10: Caterpillar Announces Officer Changes.
2018-12-20: nan

Answer: Decrease