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:2019-05-06, Stock:RIO, The news for the past five days is as follows:
2019-04-29: NEWS1: Freeport-McMoRan: What to Expect after Last Week’s Sell-Off.
2019-04-30: NEWS1: Rio Tinto CEO says 'firmly believes' U.S., China to make trade pact.NEWS2: Rio Tinto CEO explains why the company is investing in sustainable mining practices.NEWS3: Industry Watchdog Alleges Northern Dynasty Misled Investors.NEWS4: Glencore shrinks production estimates, sinking Europe markets.
2019-05-01: NEWS1: Southern Copper Corporation (SCCO) Ex-Dividend Date Scheduled for May 02, 2019.NEWS2: Southern Copper Corporation (SCCO) Ex-Dividend Date Scheduled for May 02, 2019.NEWS3: Why Rio Tinto Group's (LON:RIO) CEO Pay Matters To You.
2019-05-02: NEWS1: Mining powerhouse Rio Tinto switches to renewable energy at Utah facility.NEWS2: Mining powerhouse Rio Tinto switches to renewable energy at Utah facility.NEWS3: Strong banks and weak miners tug Europe markets in opposite directions.
2019-05-03: nan

Answer: Decrease