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:2021-07-19, Stock:NVO, The news for the past five days is as follows:
2021-07-12: NEWS1: Prothena sells ATTR amyloidosis portfolio to Novo Nordisk for up to $1.2 billion.NEWS2: Novo Nordisk To Buy Prothena's ATTR Amyloidosis Program For Up To $1.2B.NEWS3: Novo Nordisk A/S – Share repurchase programme.NEWS4: Prothena sells amyloidosis portfolio to Novo Nordisk for up to $1.2 billion.NEWS5: Novo Nordisk to buy Prothena's heart drug in deal worth up to $1.2 billion.NEWS6: Novo Nordisk to buy Prothena's heart drug in deal worth up to $1.2 bln.
2021-07-13: NEWS1: Prothena (PRTA) to Sell ATTR Amyloidosis Program to Novo Nordisk.
2021-07-14: nan
2021-07-15: nan
2021-07-16: NEWS1: Pharma Stock Roundup: NVO & LLY's Small Acquisitions, JNJ's Sunscreens Recall.

Answer: Decrease