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:2018-12-18, Stock:UNH, The news for the past five days is as follows:
2018-12-11: NEWS1: Envision reaches deal in long-running dispute with insurance giant.NEWS2: As stocks, bonds and commodities flail, technician says one area of the market is safe.NEWS3: UnitedHealth Is Signaling a Buy.NEWS4: UnitedHealthcare Renews Contract with Envision Healthcare.
2018-12-12: NEWS1: UnitedHealth Group (UNH) Outpaces Stock Market Gains: What You Should Know.NEWS2: Markets Right Now: Stocks end higher on Wall Street.NEWS3: IVV, UNH, CMCSA, DIS: Large Outflows Detected at ETF.NEWS4: IVV, UNH, CMCSA, DIS: Large Outflows Detected at ETF.NEWS5: Microsoft, Amazon, Apple Are Top Holdings of U.S. Hedge Funds.NEWS6: Our Nation’s Health: Obesity Rate at All-Time High; Childhood Poverty Continues to Decline.NEWS7: Arizona Mayo Clinic CEO to join Minnesota-based health care giant.NEWS8: The Zacks Analyst Blog Highlights: UnitedHealth, Broadcom, CVS Health, FedEx and Oracle.NEWS9: The Zacks Analyst Blog Highlights: UnitedHealth, Broadcom, CVS Health, FedEx and Oracle.NEWS10: The Zacks Analyst Blog Highlights: UnitedHealth, Broadcom, CVS Health, FedEx and Oracle.
2018-12-13: NEWS1: UnitedHealthcare Insurance Company -- Moody's rates UnitedHealth Group's senior notes A3; outlook stable.NEWS2: Owens & Minor, Inc. (OMI) Ex-Dividend Date Scheduled for December 14, 2018.NEWS3: Owens & Minor, Inc. (OMI) Ex-Dividend Date Scheduled for December 14, 2018.NEWS4: UnitedHealth Group (UNH) Outpaces Stock Market Gains: What You Should Know.NEWS5: UnitedHealth Group (UNH) Outpaces Stock Market Gains: What You Should Know.
2018-12-14: NEWS1: UnitedHealth Falls 3%.
2018-12-17: NEWS1: UnitedHealth Falls 3%.NEWS2: US STOCKS-S&P 500 hits 14-month low on economic jitters ahead of Fed meeting.NEWS3: US STOCKS-S&P 500 hits 14-month low on economic jitters ahead of Fed meeting.NEWS4: Will Lower Revenues Hurt BlackBerry's (BB) Q3 Earnings?.NEWS5: UnitedHealth trims purchase price for DaVita&apos;s medical group by $560M.NEWS6: Health Care Stocks Sink Midday After Obamacare Ruling.NEWS7: Healthcare Battered By Texas ACA Ruling.NEWS8: Healthcare Battered By Texas ACA Ruling.NEWS9: 5 Healthcare Stocks That Are Feeling Sick.NEWS10: Why the Earnings Surprise Streak Could Continue for UnitedHealth (UNH).NEWS11: Why the Earnings Surprise Streak Could Continue for UnitedHealth (UNH).NEWS12: Healthcare Stocks Take a Hit on Texas ACA Ruling.NEWS13: Healthcare Stocks Take a Hit on Texas ACA Ruling.NEWS14: Stock Market Trims Losses; Nasdaq, Small Caps Lead.NEWS15: Stocks Turn Mixed As Nasdaq Rises; Miners Rally.NEWS16: Healthcare Battered By Texas ACA Ruling.NEWS17: Healthcare Stocks Take a Hit on Texas ACA Ruling.NEWS18: Why the Earnings Surprise Streak Could Continue for UnitedHealth (UNH).NEWS19: Should You Invest in the Invesco DWA Healthcare Momentum ETF (PTH)?.

Answer: Decrease