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:2018-05-22, Stock:NVO, The news for the past five days is as follows:
2018-05-15: NEWS1: AstraZeneca’s 1Q18 Earnings: Analysts’ Estimates.NEWS2: ADRU's Holdings Could Mean 10% Gain Potential.NEWS3: ADRU's Holdings Could Mean 10% Gain Potential.
2018-05-16: nan
2018-05-17: nan
2018-05-18: NEWS1: Top Research Reports for Walmart, AT&T & Novo Nordisk.NEWS2: Top Research Reports for Walmart, AT&T & Novo Nordisk.NEWS3: Top Research Reports for Walmart, AT&T & Novo Nordisk.
2018-05-21: nan

Answer: Decrease