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:2021-12-21, Stock:SBAC, The news for the past five days is as follows:
2021-12-14: NEWS1: Deutsche Dws Market Trust Buys Prologis Inc, Equinix Inc, CapitaLand Investment, Sells ....
2021-12-15: NEWS1: Sba Communications Corp (SBAC) EVP - Operations Mark R Ciarfella Sold $1.1 million of Shares.
2021-12-16: nan
2021-12-17: nan
2021-12-20: nan

Answer: Decrease