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:2018-07-18, Stock:PSA, The news for the past five days is as follows:
2018-07-11: NEWS1: 3 Huge Biotech Winners in 2018 (So Far).NEWS2: 3 Huge Biotech Winners in 2018 (So Far).NEWS3: These 146 REITs Have 50%+ Upside From Here.NEWS4: These 146 REITs Have 50%+ Upside From Here.
2018-07-12: nan
2018-07-13: NEWS1: Key Factors to Impact Prologis' (PLD) Earnings This Season.NEWS2: Key Factors to Impact Prologis' (PLD) Earnings This Season.NEWS3: Why OPKO Health Jumped 21.1% in June.NEWS4: Why OPKO Health Jumped 21.1% in June.
2018-07-16: NEWS1: Public Storage's Preferred Stock, Series D Yield Pushes Past 5%.NEWS2: Public Storage's Preferred Stock, Series D Yield Pushes Past 5%.
2018-07-17: nan

Answer: Decrease