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:2018-12-26, Stock:UNH, The news for the past five days is as follows:
2018-12-18: NEWS1: UnitedHealth Group (UNH) Stock Sinks As Market Gains: What You Should Know.NEWS2: UnitedHealth Group Breaks Below 200-Day Moving Average - Notable for UNH.NEWS3: UnitedHealth Group Breaks Below 200-Day Moving Average - Notable for UNH.NEWS4: AM Best Affirms Credit Ratings of UnitedHealth Group Incorporated and Its UnitedHealthcare Subsidiaries.NEWS5: Healthcare ETFs Sink on JNJ News, ACA Ruling: What???s Ahead?.NEWS6: Catalyst Health Network and UnitedHealthcare’s Accountable Care Organization Relationship Fostering Quality Care at Lower Cost.NEWS7: Will Lower Revenues Hurt BlackBerry's (BB) Q3 Earnings?.NEWS8: Will Lower Revenues Hurt BlackBerry's (BB) Q3 Earnings?.
2018-12-19: NEWS1: 7 Safe Haven Stocks for a Treacherous Market.NEWS2: 7 Safe Haven Stocks for a Treacherous Market.NEWS3: Best ETFs for 2019: iShares U.S. Healthcare Providers ETF Can Run Higher.NEWS4: Best ETFs for 2019: iShares U.S. Healthcare Providers ETF Can Run Higher.NEWS5: Best ETFs for 2019: iShares U.S. Healthcare Providers ETF Can Run Higher.NEWS6: Is UnitedHealth Group Incorporated’s (NYSE:UNH) ROE Of 24% Impressive?.NEWS7: UnitedHealth Group (UNH) Stock Sinks As Market Gains: What You Should Know.NEWS8: UnitedHealth Group (UNH) Stock Sinks As Market Gains: What You Should Know.
2018-12-20: NEWS1: Markets Right Now: Stocks plunge again, Dow sinks 464 points.NEWS2: Markets Right Now: Stocks plunge again, chopping 600 off Dow.NEWS3: UnitedHealth Falls 3%.NEWS4: Dow Movers: WBA, DWDP.NEWS5: Dow Movers: WBA, DWDP.
2018-12-21: NEWS1: UnitedHealth Group Schedules Fourth Quarter and Full Year 2018 Earnings Release and Conference Call for January 15, 2019.
2018-12-24: NEWS1: 5 Worst Performing Stocks of Dow ETF Last Week.NEWS2: 5 Worst Performing Stocks of Dow ETF Last Week.NEWS3: 5 Worst Performing Stocks of Dow ETF Last Week.NEWS4: We Did The Math XRLV Can Go To $38.NEWS5: We Did The Math XRLV Can Go To $38.

Answer: Rise