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:2018-09-20, Stock:VALE, The news for the past five days is as follows:
2018-09-13: NEWS1: Freeport-McMoRan’s Valuation: Look beyond 2019.NEWS2: Copper Miners: Tough to Love, Even Tougher to Hate.
2018-09-14: nan
2018-09-17: NEWS1: Copper Miners Squeezed as Tariffs and Sanctions Disrupt Markets.
2018-09-18: NEWS1: Vale S.A. Stock Upgraded and Downgraded: What You Need to Know.NEWS2: Vale S.A. Stock Upgraded and Downgraded: What You Need to Know.NEWS3: Vale S.A. Stock Upgraded and Downgraded: What You Need to Know.
2018-09-19: nan

Answer: Rise