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:2019-07-16, Stock:RIO, The news for the past five days is as follows:
2019-07-09: nan
2019-07-10: NEWS1: Why Rio Tinto Stock Rose a Hefty 28% in the First Six Months of 2019.NEWS2: Why Rio Tinto Stock Rose a Hefty 28% in the First Six Months of 2019.NEWS3: Most Asia-Pacific Indexes Gain as Markets Wait for Powell.NEWS4: Why Rio Tinto Stock Rose a Hefty 28% in the First Six Months of 2019.NEWS5: Caledonia Mining Corporation Plc (CMCL) Ex-Dividend Date Scheduled for July 11, 2019.NEWS6: Caledonia Mining Corporation Plc (CMCL) Ex-Dividend Date Scheduled for July 11, 2019.
2019-07-11: NEWS1: Gold Price Pop on Powell's Rate Cut Signal: 5 Top Picks.NEWS2: Gold Price Pop on Powell's Rate Cut Signal: 5 Top Picks.NEWS3: BHP Is Latest Giant Miner to Plan Exit From Thermal Coal.NEWS4: Gold Price Pop on Powell's Rate Cut Signal: 5 Top Picks.NEWS5: Shrinking demand to eclipse supply issues in tin market.
2019-07-12: NEWS1: The Zacks Analyst Blog Highlights: Franco-Nevada, Royal Gold, Rio Tinto, SSR and BHP.NEWS2: The Zacks Analyst Blog Highlights: Franco-Nevada, Royal Gold, Rio Tinto, SSR and BHP.NEWS3: Olin (OLN) Announces the Pricing of Senior Notes Due 2029.NEWS4: Olin (OLN) Announces the Pricing of Senior Notes Due 2029.NEWS5: China’s Iron Ore Imports Drop, Will Prices Stay Elevated?.NEWS6: The Zacks Analyst Blog Highlights: Franco-Nevada, Royal Gold, Rio Tinto, SSR and BHP.NEWS7: Olin (OLN) Announces the Pricing of Senior Notes Due 2029.NEWS8: Rio Tinto Group (LON:RIO) Delivered A Better ROE Than Its Industry.NEWS9: Australian Thermal Coal Leaves Investors Cold.NEWS10: The World’s Biggest Diamond Mine Is Closing.
2019-07-15: NEWS1: ArcelorMittal (MT) Declares Pricing of Notes Due 2024 & 2029.NEWS2: ArcelorMittal (MT) Declares Pricing of Notes Due 2024 & 2029.NEWS3: ArcelorMittal (MT) Declares Pricing of Notes Due 2024 & 2029.NEWS4: Rio Tinto warns of cost blowout at major copper project.NEWS5: Iron Ore Won't Soar Forever.

Answer: Decrease