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:RIO, The news for the past five days is as follows:
2018-08-08: NEWS1: Rio Tinto Plc (RIO) Ex-Dividend Date Scheduled for August 09, 2018.NEWS2: Rio Tinto Plc (RIO) Ex-Dividend Date Scheduled for August 09, 2018.NEWS3: Miners Spend on Shareholders, Not Projects.NEWS4: Glencore Keeps Its Powder Dry, But Hints at Bigger Returns.NEWS5: Glencore Keeping Powder Dry Poses Question: Deals or Dividends?.NEWS6: [$$] Miners Spend on Shareholders, Not Projects.
2018-08-09: NEWS1: Rio Tinto considers float of Canadian iron ore business-sources.
2018-08-10: NEWS1: Grasberg: What’s Delaying the Final Resolution?.
2018-08-13: NEWS1: Freeport Bears: Analyzing Copper and the Debt Position.
2018-08-14: nan

Answer: Decrease