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:2018-08-21, Stock:VALE, The news for the past five days is as follows:
2018-08-14: nan
2018-08-15: NEWS1: Miners Get Slammed as Copper Prices Enter Bear Market Territory.
2018-08-16: NEWS1: Vale Breaks Below 200-Day Moving Average - Notable for VALE.NEWS2: Vale Breaks Below 200-Day Moving Average - Notable for VALE.
2018-08-17: NEWS1: Mosaic (MOS) to Gain on Strong Demand, Vale Assets Buyout.
2018-08-20: NEWS1: Ken Heebner Trims Citigroup, Vale Positions.NEWS2: Has VALE (VALE) Outpaced Other Basic Materials Stocks This Year?.

Answer: Decrease