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:2018-03-22, Stock:RIO, The news for the past five days is as follows:
2018-03-15: NEWS1: After Hours Most Active for Mar 15, 2018 :  RIO, TEVA, MPLX, HPE, EPD, ETE, QQQ, USMC, MU, ETFC, MSFT, XEL.NEWS2: After Hours Most Active for Mar 15, 2018 :  RIO, TEVA, MPLX, HPE, EPD, ETE, QQQ, USMC, MU, ETFC, MSFT, XEL.NEWS3: How Is Alcoa Likely To Grow In The Next 2 Years?.NEWS4: How Is Alcoa Likely To Grow In The Next 2 Years?.NEWS5: Former Lazard Banker’s Home Raided in Rio Tinto Probe.
2018-03-16: NEWS1: Mongolia Oyu Tolgoi copper mine 2017 revenue drops 22 pct as construction delays weigh.
2018-03-19: NEWS1: Rio Sales Pitch Looks Lightweight.NEWS2: Did the Tariffs Dent Aluminum Market Sentiments?.NEWS3: US Aluminum Producers after Section 232 Tariffs.NEWS4: Swiss seize bank accounts amid probe linked to Rio Tinto Mongolia mine.
2018-03-20: NEWS1: Freeport in Indonesia: Best-Case and Worst-Case Scenarios.NEWS2: Midday Update: Wall Street Bounces Back From Tech Frenzy, Helped by Oil Rally.NEWS3: Midday Update: Wall Street Bounces Back From Tech Frenzy, Helped by Oil Rally.NEWS4: Futures Struggle to Stay Positive As Wall Street Braces for FOMC.NEWS5: Futures Struggle to Stay Positive As Wall Street Braces for FOMC.NEWS6: Energy Sector Update for 03/20/2018: USO, UNG, PNM, ORIG, GLEN.L.NEWS7: Energy Sector Update for 03/20/2018: USO, UNG, PNM, ORIG, GLEN.L.NEWS8: Could Alcoa Gain from the Section 232 Tariffs?.NEWS9: [$$] Glencore Doubles Down on Coal With $1.7 Billion Australian Investment.NEWS10: Rio Tinto fears impact of trade war concerns despite tariff exemptions.NEWS11: Glencore snaps up Rio Tinto's Hail Creek coal mine, project for $1.7 billion.NEWS12: Wall Street Turns Bullish on Century Aluminum.NEWS13: [$$] Glencore to buy Australian coal mine from Rio Tinto in $1.7bn deal.NEWS14: Rio Tinto Launches New Debt Reduction Program - Quick Facts.NEWS15: Rio Tinto Launches New Debt Reduction Program - Quick Facts.NEWS16: U.S. SEC says court should deny Rio Tinto's push to dismiss fraud charges.
2018-03-21: NEWS1: Swiss probe Rio Tinto over possible bribes, ex-Mongolian minister expects to be cleared.NEWS2: Swiss attorney general says examining if Rio Tinto or subsidiaries paid bribes linked to Mongolian mining project.NEWS3: Is Teck Resources Ltd a Buy?.NEWS4: Is Teck Resources Ltd a Buy?.NEWS5: Is Teck Resources Ltd a Buy?.NEWS6: Randgold Resources Limited (GOLD) Ex-Dividend Date Scheduled for March 22, 2018.NEWS7: Randgold Resources Limited (GOLD) Ex-Dividend Date Scheduled for March 22, 2018.NEWS8: AngloGold Ashanti Limited (AU) Ex-Dividend Date Scheduled for March 22, 2018.NEWS9: AngloGold Ashanti Limited (AU) Ex-Dividend Date Scheduled for March 22, 2018.NEWS10: Indonesia's Inalum expects to line up Freeport sale bank financing soon.NEWS11: Mongolia minister says he expects to be cleared in mining deal graft probe.NEWS12: [$$] Glencore Doubles Down on Coal With $1.7 Billion Australian Investment.

Answer: Decrease