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:2021-02-16, Stock:UNH, The news for the past five days is as follows:
2021-02-08: nan
2021-02-09: NEWS1: CHANGE HEALTHCARE INVESTOR ALERT BY THE FORMER ATTORNEY GENERAL OF LOUISIANA: Kahn Swick & Foti, LLC Investigates Adequacy of Price and Process in Proposed Sale of Change Healthcare - CHNG.NEWS2: Dow Jones, Nasdaq Hit New High As Stocks Gain; Biden Stimulus Talks In Focus.NEWS3: UnitedHealth Retiring CEO to Get 2 Years of Salary, Bonus.
2021-02-10: NEWS1: 3 Dow Jones Stocks That Will Rise 40% or More -- If Wall Street's Bulls Have It Right.
2021-02-11: NEWS1: U.S. Anesthesia Partners, Inc. -- Moody's affirms U.S. Anesthesia Partners' B3 CFR, outlook changed to stable from negative.
2021-02-12: NEWS1: HSA Investment Advice: Spending Vs. Investing Your HSA Funds.

Answer: Decrease