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:2018-09-28, Stock:RIO, The news for the past five days is as follows:
2018-09-21: NEWS1: Company News For Sep 21, 2018.NEWS2: Company News For Sep 21, 2018.NEWS3: Company News For Sep 21, 2018.NEWS4: Asian Shares Extend Recovery; China Leads Gains.NEWS5: Asian Shares Extend Recovery; China Leads Gains.
2018-09-24: NEWS1: Asian Shares Fall As New US Tariffs Take Effect.NEWS2: Asian Shares Fall As New US Tariffs Take Effect.
2018-09-25: nan
2018-09-26: NEWS1: Asian Markets Mixed After Fed Rate Hike.NEWS2: Asian Markets Mixed After Fed Rate Hike.NEWS3: Australian Market Flat Amid Cautious Trades.NEWS4: Australian Market Flat Amid Cautious Trades.NEWS5: Yamana Gold Inc. (AUY) Ex-Dividend Date Scheduled for September 27, 2018.NEWS6: Yamana Gold Inc. (AUY) Ex-Dividend Date Scheduled for September 27, 2018.NEWS7: Kirkland Lake Gold Ltd. (KL) Ex-Dividend Date Scheduled for September 27, 2018.NEWS8: Kirkland Lake Gold Ltd. (KL) Ex-Dividend Date Scheduled for September 27, 2018.NEWS9: Osisko Gold Royalties Ltd (OR) Ex-Dividend Date Scheduled for September 27, 2018.NEWS10: Osisko Gold Royalties Ltd (OR) Ex-Dividend Date Scheduled for September 27, 2018.NEWS11: [$$] Diamond price forecasts add a rosy tint to mine closures.
2018-09-27: NEWS1: Asian Markets Mostly Higher, Led By Japan.NEWS2: Asian Markets Mostly Higher, Led By Japan.NEWS3: Australian Market Advances.NEWS4: Australian Market Advances.NEWS5: Stocks - Rite Aid, Freeport-McMoran Gain in Pre-market; Conagra Falls.NEWS6: Freeport, Rio enter binding agreement for Grasberg divestment to Inalum.NEWS7: Indonesia plans news conference on $3.9 bln Freeport copper mine deal.NEWS8: Indonesia plans news conference on Freeport, Rio Tinto transaction.

Answer: Decrease