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:2018-09-24, Stock:PSA, The news for the past five days is as follows:
2018-09-17: NEWS1: Commit To Purchase Public Storage At $170, Earn 5.7% Using Options.NEWS2: Commit To Purchase Public Storage At $170, Earn 5.7% Using Options.
2018-09-18: NEWS1: Expansion Efforts Aid Public Storage (PSA): Should You Hold?.
2018-09-19: nan
2018-09-20: NEWS1: This Tiny REIT Could Deliver Big Returns.NEWS2: This Tiny REIT Could Deliver Big Returns.
2018-09-21: nan

Answer: Decrease