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:2018-02-22, Stock:PSA, The news for the past five days is as follows:
2018-02-14: nan
2018-02-15: NEWS1: Annaly Capital (NLY) Q4 Earnings Beat Estimates, NII Grows.NEWS2: Annaly Capital (NLY) Q4 Earnings Beat Estimates, NII Grows.NEWS3: Kimco Realty (KIM) Q4 FFO Meets Estimates, Occupancy Rises.NEWS4: Kimco Realty (KIM) Q4 FFO Meets Estimates, Occupancy Rises.
2018-02-16: NEWS1: Digital Realty (DLR) Beats Q4 FFO Estimates, Affirms View.NEWS2: Digital Realty (DLR) Beats Q4 FFO Estimates, Affirms View.
2018-02-20: NEWS1: Public Storage Reports Results for the Fourth Quarter and Year Ended December 31, 2017.NEWS2: Public Storage To Appoint Joe Russell As CEO, In Addition To Role As President.NEWS3: Public Storage To Appoint Joe Russell As CEO, In Addition To Role As President.NEWS4: After-Hours Earnings Report for February 20, 2018 :  PSA, CXO, DVN, VRSK, FE, AWK, EXR, FLR, TV, ENLK, VVC, NFX.NEWS5: After-Hours Earnings Report for February 20, 2018 :  PSA, CXO, DVN, VRSK, FE, AWK, EXR, FLR, TV, ENLK, VVC, NFX.NEWS6: iShares U.S. Real Estate ETF Experiences Big Outflow.NEWS7: iShares U.S. Real Estate ETF Experiences Big Outflow.
2018-02-21: NEWS1: Public Storage (PSA) Q4 FFO Beats Estimates, Revenues Up Y/Y.NEWS2: The Implied Analyst 12-Month Target For IWF.NEWS3: The Implied Analyst 12-Month Target For IWF.NEWS4: Public Storage to Host Earnings Call.NEWS5: Public Storage (PSA) Q4 FFO Beats Estimates, Revenues Up Y/Y.NEWS6: Public Storage Q4 17 Earnings Conference Call At 2:00 PM ET.NEWS7: Public Storage Q4 17 Earnings Conference Call At 2:00 PM ET.NEWS8: Public Storage Announces Senior Management Changes.

Answer: Rise