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:2018-12-19, Stock:PTR, The news for the past five days is as follows:
2018-12-12: NEWS1: Energy Sector Update for 12/12/2018: PCG, PTR, HES.NEWS2: Energy Sector Update for 12/12/2018: PCG, PTR, HES.NEWS3: China Stock Market Poised To Extend Winning Streak.NEWS4: China Stock Market Poised To Extend Winning Streak.NEWS5: What to Expect from Shell Stock by the End of 2018.NEWS6: China Determined To Avoid Another Natural Gas Crisis.NEWS7: Range Resources Corporation (RRC) Ex-Dividend Date Scheduled for December 13, 2018.NEWS8: Range Resources Corporation (RRC) Ex-Dividend Date Scheduled for December 13, 2018.NEWS9: Evolution Petroleum Corporation, Inc. (EPM) Ex-Dividend Date Scheduled for December 13, 2018.NEWS10: Evolution Petroleum Corporation, Inc. (EPM) Ex-Dividend Date Scheduled for December 13, 2018.NEWS11: Devon Energy Corporation (DVN) Ex-Dividend Date Scheduled for December 13, 2018.NEWS12: Devon Energy Corporation (DVN) Ex-Dividend Date Scheduled for December 13, 2018.NEWS13: Encana Corporation (ECA) Ex-Dividend Date Scheduled for December 13, 2018.NEWS14: Encana Corporation (ECA) Ex-Dividend Date Scheduled for December 13, 2018.NEWS15: Chesapeake Utilities Corporation (CPK) Ex-Dividend Date Scheduled for December 13, 2018.NEWS16: Chesapeake Utilities Corporation (CPK) Ex-Dividend Date Scheduled for December 13, 2018.NEWS17: Cenovus Energy Inc (CVE) Ex-Dividend Date Scheduled for December 13, 2018.NEWS18: Cenovus Energy Inc (CVE) Ex-Dividend Date Scheduled for December 13, 2018.
2018-12-13: NEWS1: Energy Sector Update for 12/13/2018: FGP, PTR, CNPC, LLEX.NEWS2: Energy Sector Update for 12/13/2018: FGP, PTR, CNPC, LLEX.NEWS3: Consolidation Called For China Stock Market.NEWS4: Consolidation Called For China Stock Market.NEWS5: Why Did Shell’s Short Interest Rise?.NEWS6: Energy Sector Update for 12/13/2018: XOM, TOT, PTR, CNPC, CVX, COP, SLB, OXY.NEWS7: Energy Sector Update for 12/13/2018: XOM, TOT, PTR, CNPC, CVX, COP, SLB, OXY.NEWS8: Sabine Royalty Trust (SBR) Ex-Dividend Date Scheduled for December 14, 2018.NEWS9: Sabine Royalty Trust (SBR) Ex-Dividend Date Scheduled for December 14, 2018.NEWS10: Berry Petroleum Corporation (BRY) Ex-Dividend Date Scheduled for December 14, 2018.NEWS11: Berry Petroleum Corporation (BRY) Ex-Dividend Date Scheduled for December 14, 2018.NEWS12: How Has Shell’s Dividend Yield Trended?.
2018-12-14: NEWS1: PetroChina Reports Hydrocarbon Flow From Tarim Basin Well.
2018-12-17: NEWS1: China Stock Market Expected To Open In The Red.NEWS2: China Stock Market Expected To Open In The Red.
2018-12-18: NEWS1: China Market May Test Resistance At 2,600 Points.NEWS2: China Market May Test Resistance At 2,600 Points.

Answer: Decrease