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:2019-11-01, Stock:UNH, The news for the past five days is as follows:
2019-10-25: NEWS1: Optum algorithm used by hospitals had racial bias, researchers say.NEWS2: Universal Health's (UHS) Earnings Lag in Q3, Decline Y/Y.
2019-10-28: nan
2019-10-29: NEWS1: Dow Jones Today: Struggling at the Highs.NEWS2: HCA Healthcare (HCA) Q3 Earnings Beat Estimates, Improve Y/Y.NEWS3: New UnitedHealthcare Benefit for Low Back Pain Helps Reduce Invasive Procedures and Address the Opioid Epidemic.NEWS4: UnitedHealth algorithm accused of racial bias gets scrutiny from N.Y. regulators.NEWS5: 5 Lagging Blue Chips That Can Lead as Investors Turn Bearish.
2019-10-30: NEWS1: WellCare Health (WCG) Q3 Earnings & Revenues Beat Estimates.NEWS2: What Apple’s Recent Bullishness Means For The Dow ETF.NEWS3: Community Health's (CYH) Q3 Loss Narrower Than Expected.NEWS4: Molina Healthcare (MOH) Q3 Earnings Surpass, Increase Y/Y.
2019-10-31: NEWS1: Ensign Group's (ENSG) Q3 Earnings Miss Estimates, Rise Y/Y.NEWS2: Medical insurance giant, UnitedHealth, buys Vivify Health.NEWS3: Cigna (CI) Q3 Earnings & Revenues Beat Estimates, View Up.

Answer: Decrease