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:2021-08-23, Stock:UNH, The news for the past five days is as follows:
2021-08-16: NEWS1: Top Analyst Reports for Walmart, UnitedHealth & Starbucks.
2021-08-17: NEWS1: Dow Jones Slumps 400 Points; Home Depot Hit On Earnings, But 3 Recent IPOs Soar To New Highs.NEWS2: Here's Why You Should Retain UnitedHealth Group (UNH) Stock.
2021-08-18: NEWS1: 4 Health Insurance Companies Poised for Growth in 2H21.NEWS2: Dow Jones Futures: Market Rally Retreats, Tesla, Home Depot, CrowdStrike Hit; Target Falls On Earnings.
2021-08-19: nan
2021-08-20: NEWS1: UnitedHealth Group (UNH) Gains But Lags Market: What You Should Know.NEWS2: UnitedHealth (UNH) Hits 52-Week High: Hold it for Steady Growth.

Answer: Decrease