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:2021-10-27, Stock:RIO, The news for the past five days is as follows:
2021-10-20: NEWS1: Iron Rout Has Vale Cutting Back After Bumper Third Quarter.NEWS2: Rio Tinto announces bold $7.5 billion spend to halve carbon emissions by 2030; shares fall.NEWS3: Rio Tinto to strengthen performance, decarbonise and grow.
2021-10-21: nan
2021-10-22: NEWS1: U.S. appeals court hints at support for Rio's Resolution copper mine.NEWS2: UPDATE 2-U.S. appeals court hints at support for Rio's Resolution copper mine.NEWS3: Australia watchdog closes probe into former Rio Tinto exec Davies-letter.
2021-10-25: NEWS1: Hedge Funds Are Souring On Rio Tinto Group (RIO).NEWS2: Supply-Chain Disruptions Encourage Rio Tinto to Mine Its Own Sludge for Critical Minerals.
2021-10-26: NEWS1: Rio Tinto and Carbfix partner for carbon capture and storage.

Answer: Decrease