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:2018-08-22, Stock:SBAC, The news for the past five days is as follows:
2018-08-15: nan
2018-08-16: NEWS1: Telecom Stock Roundup: CenturyLink Earnings, QUALCOMM Settlement & More.NEWS2: Telecom Stock Roundup: CenturyLink Earnings, QUALCOMM Settlement & More.
2018-08-17: nan
2018-08-20: NEWS1: SBA Communications Corporation to Speak at the Bank of America Merrill Lynch 2018 Media, Communications & Entertainment Conference.
2018-08-21: nan

Answer: Decrease