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:2018-05-11, Stock:SBAC, The news for the past five days is as follows:
2018-05-04: nan
2018-05-07: nan
2018-05-08: nan
2018-05-09: NEWS1: American Tower Grows in Africa, to Buy Telkom Kenya Towers.NEWS2: American Tower Grows in Africa, to Buy Telkom Kenya Towers.
2018-05-10: NEWS1: What’s American Tower’s 2018 Outlook?.NEWS2: What to Expect from American Tower in 2018 amid 5G Rollout.NEWS3: Today’s Research Report Coverage on Vonage Holdings and Three More Communication Services Stocks.

Answer: Decrease