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:2020-10-19, Stock:RIO, The news for the past five days is as follows:
2020-10-12: NEWS1: Is Rio Tinto Group (RIO) Stock A Buy?.NEWS2: Caterpillar bets on self-driving machines impervious to pandemics.NEWS3: FOCUS-Caterpillar bets on self-driving machines impervious to pandemics.
2020-10-13: nan
2020-10-14: nan
2020-10-15: NEWS1: Rio Tinto releases third quarter production results.
2020-10-16: NEWS1: Rio Tinto vows reform as Australian lawmaker accuses industry of cultural genocide.NEWS2: Rio’s CEO Says Miner Made Key Changes Since Heritage Blasts.

Answer: Decrease