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:2018-08-22, Stock:NVO, The news for the past five days is as follows:
2018-08-15: NEWS1: Novo Nordisk’s Biopharmaceuticals Segment: An Update.NEWS2: Analysts’ Recommendations for GlaxoSmithKline Stock.
2018-08-16: NEWS1: Novo Nordisk A/S (NVO) Ex-Dividend Date Scheduled for August 17, 2018.NEWS2: Novo Nordisk A/S (NVO) Ex-Dividend Date Scheduled for August 17, 2018.
2018-08-17: NEWS1: [$$] Novo Nordisk buys UK university biotech spin-out Ziylo.
2018-08-20: NEWS1: Novo Nordisk Buys Ziylo to Develop Glucose Responsive Insulin.
2018-08-21: nan

Answer: Decrease