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:2018-01-18, Stock:PTR, The news for the past five days is as follows:
2018-01-10: NEWS1: Win Streak Likely To End For China Stock Market.NEWS2: Win Streak Likely To End For China Stock Market.NEWS3: MV Oil Trust (MVO) Ex-Dividend Date Scheduled for January 11, 2018.NEWS4: PetroChina's Dalian refinery nearly doubles Russian pipeline oil supply - source.NEWS5: PetroChina eyes extension of Indonesian contracts.
2018-01-11: NEWS1: Passive Index Funds Pushed To Be More Active Voice For ESG.NEWS2: China Stock Market May Extend Winning Streak.NEWS3: China Stock Market May Extend Winning Streak.NEWS4: Stocks Regain Mojo, Bitcoin ETF Sinks; Will This China Energy Stock Soar?.NEWS5: Energy Sector Update for 01/11/2018: DRYS,PTR,KMI.NEWS6: RGC Resources Inc. (RGCO) Ex-Dividend Date Scheduled for January 12, 2018.NEWS7: Sabine Royalty Trust (SBR) Ex-Dividend Date Scheduled for January 12, 2018.
2018-01-12: NEWS1: Stocks Up, Paycom Breaks Out; Time To Buy This Bitcoin ETF Again?.NEWS2: EOG Resources, Inc. (EOG) Ex-Dividend Date Scheduled for January 16, 2018.
2018-01-16: NEWS1: Renewed Selling Pressure Likely For China Shares.NEWS2: Renewed Selling Pressure Likely For China Shares.NEWS3: ETFs & Stocks to Buy on Falling Dollar.
2018-01-17: NEWS1: Win Streak May Continue For China Bourse.NEWS2: Win Streak May Continue For China Bourse.

Answer: Decrease