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:2019-08-23, Stock:UNH, The news for the past five days is as follows:
2019-08-16: NEWS1: David Tepper Invests in 2 Managed Care Companies in 2nd Quarter.NEWS2: VONG, MA, UNH, CSCO: Large Outflows Detected at ETF.NEWS3: VONG, MA, UNH, CSCO: Large Outflows Detected at ETF.
2019-08-19: NEWS1: Positive China News Helps Stocks Rise.NEWS2: Positive China News Helps Stocks Rise.NEWS3: Noteworthy Monday Option Activity: MDT, UNH, BHVN.NEWS4: Noteworthy Monday Option Activity: MDT, UNH, BHVN.NEWS5: Market Close Report: NASDAQ Composite Index closes above 8000; up 106.82 points at 8,002.81.NEWS6: Market Close Report: NASDAQ Composite Index closes above 8000; up 106.82 points at 8,002.81.NEWS7: UAB Health System and UnitedHealthcare finalize agreement.NEWS8: What To Know Before Buying UnitedHealth Group Incorporated (NYSE:UNH) For Its Dividend.
2019-08-20: NEWS1: 3 Healthcare Stocks to Trade: UNH, JNJ and PFE.NEWS2: It's Still All About Politics For This ETF.
2019-08-21: NEWS1: Larry Robbins Buys 3 Stocks in 2nd Quarter.NEWS2: Is UnitedHealth Stock’s Dividend Worth the Hassle for Investors?.NEWS3: Is UnitedHealth Stock’s Dividend Worth the Hassle for Investors?.NEWS4: UnitedHealth Group (UNH) Gains But Lags Market: What You Should Know.NEWS5: Is UnitedHealth Stock’s Dividend Worth the Hassle for Investors?.NEWS6: Is UnitedHealth Group (UNH) A Great Pick for Value Investors?.NEWS7: Is UnitedHealth Group (UNH) A Great Pick for Value Investors?.NEWS8: Is UnitedHealth Group (UNH) A Great Pick for Value Investors?.NEWS9: More than Twice as Many Employers than 10 Years Ago are Planning to Increase Investments in Employee Health and Wellness, Optum Study Shows.NEWS10: Three state attorneys general challenge Trump on immigrant benefits.NEWS11: 3 Healthcare Stocks to Trade: UNH, JNJ and PFE.NEWS12: 3 Healthcare Stocks to Trade: UNH, JNJ and PFE.
2019-08-22: NEWS1: UnitedHealthcare and Optum Take Action to Support People Affected by Severe Weather in Iowa.NEWS2: UnitedHealthcare and Optum Take Action to Support People Affected by Wildfires in Alaska.NEWS3: Stocks End Mixed Ahead of Powell Speech.NEWS4: Stocks End Mixed Ahead of Powell Speech.NEWS5: US Indexes Close With Mixed Results Thursday, Dow Up 0.19%.NEWS6: Market Close Report: NASDAQ Composite index closes at 7,991.39 down -28.82 points.NEWS7: Market Close Report: NASDAQ Composite index closes at 7,991.39 down -28.82 points.NEWS8: Andreas Halvorsen Keeps Buying Centene, DaVita.NEWS9: Dow Jones Today: Data Dependency Emerges.NEWS10: Dow Movers: UNH, BA.NEWS11: Dow Movers: UNH, BA.NEWS12: Dow flat despite losses in shares of Dow Inc., UnitedHealth.NEWS13: UnitedHealth, Microsoft share losses contribute to Dow's nearly 75-point drop.NEWS14: UnitedHealth Group (UNH) Gains But Lags Market: What You Should Know.NEWS15: UnitedHealth Group (UNH) Gains But Lags Market: What You Should Know.

Answer: Decrease