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:2018-04-27, Stock:RIO, The news for the past five days is as follows:
2018-04-20: nan
2018-04-23: NEWS1: Alcoa Stock, Aluminum Prices Plunge As U.S. Softens Rusal Sanctions.NEWS2: FTSE 100 lingers around 11-week high, even as miners rally.
2018-04-24: NEWS1: Freeport-McMoRan’s 1Q18 Earnings: Reading between the Lines.NEWS2: [$$] Supply deals with Rusal’s Irish plant to restart as sanctions ease.NEWS3: [$$] Freeport says Indonesian mine sale talks continue.
2018-04-25: NEWS1: What To Expect From Vale’s Q1 Earnings.NEWS2: What To Expect From Vale’s Q1 Earnings.NEWS3: Could Markets Have Pre-Empted Freeport’s Massive Slide?.NEWS4: Should Freeport’s Lower Guidance Concern Investors?.NEWS5: 5 Reasons Freeport-McMoRan Fell after Its 1Q18 Release.NEWS6: [$$] Freeport Is Worst Performer in S&P 500 as Indonesia Troubles Pound Shares.
2018-04-26: NEWS1: Mesabi Trust (MSB) Ex-Dividend Date Scheduled for April 27, 2018.NEWS2: Mesabi Trust (MSB) Ex-Dividend Date Scheduled for April 27, 2018.NEWS3: Vale’s 1Q18 Earnings Miss on Lower Prices and Higher Costs.

Answer: Decrease