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:2019-01-07, Stock:PSA, The news for the past five days is as follows:
2018-12-28: NEWS1: February 2019 Options Now Available For Public Storage (PSA).NEWS2: February 2019 Options Now Available For Public Storage (PSA).
2018-12-31: NEWS1: Notable Monday Option Activity: TWTR, HP, PSA.NEWS2: Notable Monday Option Activity: TWTR, HP, PSA.NEWS3: Traders bet on this consumer staples name. Plus, the trad....
2019-01-02: NEWS1: Public Storage's Preferred Stock, Series F Shares Cross 6% Yield Mark.NEWS2: Public Storage's Preferred Stock, Series F Shares Cross 6% Yield Mark.
2019-01-03: nan
2019-01-04: NEWS1: Friday Sector Laggards: Utilities, Financial.NEWS2: Friday Sector Laggards: Utilities, Financial.

Answer: Decrease