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:2019-02-19, Stock:SBAC, The news for the past five days is as follows:
2019-02-11: nan
2019-02-12: NEWS1: SBA Communications Corporation to Speak at the Morgan Stanley Technology, Media & Telecom Conference.
2019-02-13: nan
2019-02-14: nan
2019-02-15: NEWS1: Detailed Research: Economic Perspectives on Yelp, Jabil, SBA Communications, comScore, AVX, and Akcea Therapeutics — What Drives Growth in Today's Competitive Landscape.

Answer: Decrease