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:2020-12-22, Stock:SO, The news for the past five days is as follows:
2020-12-15: nan
2020-12-16: NEWS1: Southern Power transfers more than 2,000 acres to the Open Space Institute for the preservation of endangered species habitat in Wayne County, Ga..NEWS2: Southern Company's (SO) Vogtle Unit 3 Achieves Milestone.
2020-12-17: NEWS1: Mark Lantrip announces retirement after four decades of service to Southern Company; Company names Chris Cummiskey Chief Commercial and Customer Solutions Officer.
2020-12-18: NEWS1: The Zacks Analyst Blog Highlights: PayPal, Shopify, BP p.l.c., Gilead Sciences and Southern Co.
2020-12-21: nan

Answer: Decrease