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:2021-12-09, Stock:PSA, The news for the past five days is as follows:
2021-12-02: nan
2021-12-03: NEWS1: California-based self-storage operator expands DFW presence.NEWS2: Public Storage (PSA) Closes All Storage Buyout, Boosts Portfolio.NEWS3: Public Storage Announces Closing of the All Storage Acquisition Amid Significant Growth Acceleration.
2021-12-06: nan
2021-12-07: nan
2021-12-08: NEWS1: Hedge Funds Have Never Been This Bullish On Public Storage (PSA).

Answer: Decrease