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:2021-04-22, Stock:NVO, The news for the past five days is as follows:
2021-04-15: nan
2021-04-16: nan
2021-04-19: NEWS1: Novo Nordisk A/S – Share repurchase programme.
2021-04-20: NEWS1: The Zacks Analyst Blog Highlights: Microsoft, JPMorgan, Honeywell International, Novo Nordisk and Starbucks.
2021-04-21: NEWS1: No­vo Nordisk To Start Phase 3 Obe­si­ty Tri­al With Oral Semaglu­tide.NEWS2: Novo Nordisk to initiate phase 3a development in obesity with oral semaglutide.

Answer: Decrease