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:2018-12-19, Stock:VALE, The news for the past five days is as follows:
2018-12-12: NEWS1: Is the Party Over for Commodities as China Steel Feels the Heat?.NEWS2: Weakening Outlook Keeps Pushing Chinese Steel Prices Lower.NEWS3: China’s Iron Ore Imports Have Fallen, Outlook Remains Muted.
2018-12-13: NEWS1: Vale Bolsters Case for Takeover of BHP JV With Acquisition.NEWS2: Will Chinese Steel Mills’ Pains Intensify with the Trade War?.
2018-12-14: NEWS1: Royal Gold Bets on New Mines, Buyouts, Low Gold Prices Hurt.NEWS2: Royal Gold Bets on New Mines, Buyouts, Low Gold Prices Hurt.NEWS3: Royal Gold Bets on New Mines, Buyouts, Low Gold Prices Hurt.NEWS4: Why China Needs More Than a Trade War Truce to Buck the Slowdown.
2018-12-17: nan
2018-12-18: NEWS1: Why Should You Add Mosaic (MOS) Stock to Your Portfolio?.NEWS2: Why Should You Add Mosaic (MOS) Stock to Your Portfolio?.NEWS3: Why Should You Add Mosaic (MOS) Stock to Your Portfolio?.

Answer: Decrease