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:2019-12-18, Stock:SO, The news for the past five days is as follows:
2019-12-11: NEWS1: Top Research Reports for Novartis, AbbVie & Sanofi.NEWS2: What To Know Before Buying The Southern Company (NYSE:SO) For Its Dividend.
2019-12-12: nan
2019-12-13: nan
2019-12-16: NEWS1: Vogtle Unit 3 main control room begins operations.
2019-12-17: NEWS1: Georgia Public Service Commission approves Georgia Power rate increase.NEWS2: Here's Why You Should Add NiSource (NI) in Your Portfolio Now.

Answer: Decrease