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:2018-08-15, Stock:VALE, The news for the past five days is as follows:
2018-08-08: NEWS1: Wednesday's ETF with Unusual Volume: MXI.NEWS2: Wednesday's ETF with Unusual Volume: MXI.NEWS3: Rio Tinto Plc (RIO) Ex-Dividend Date Scheduled for August 09, 2018.NEWS4: Rio Tinto Plc (RIO) Ex-Dividend Date Scheduled for August 09, 2018.
2018-08-09: nan
2018-08-10: NEWS1: Emerging-Markets Stocks: 10 Ways to Play the Next Bull Market.
2018-08-13: NEWS1: Brazil's Bradespar sells debt to pay for Dantas judgment -source.NEWS2: Brazil's Bradespar debt sale to pay for Dantas judgment - source.NEWS3: Why the Earnings Surprise Streak Could Continue for VALE S.A. (VALE).NEWS4: Moody's: Improving conditions for Brazil's corporates, but political uncertainty adds pressure.NEWS5: 3 Stocks That May Be Crushed by a Strong Dollar.
2018-08-14: nan

Answer: Decrease