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:2018-12-07, Stock:PTR, The news for the past five days is as follows:
2018-11-29: NEWS1: China Bourse May Extend Thursday's Losses.NEWS2: China Bourse May Extend Thursday's Losses.NEWS3: Why Has the Short Interest in ExxonMobil Stock Risen?.NEWS4: ENSCO plc (ESV) Ex-Dividend Date Scheduled for November 30, 2018.NEWS5: ENSCO plc (ESV) Ex-Dividend Date Scheduled for November 30, 2018.
2018-11-30: nan
2018-12-03: NEWS1: China Stock Market May Extend Winning Streak.NEWS2: China Stock Market May Extend Winning Streak.
2018-12-04: NEWS1: Rally Likely To Stall For China Stock Market.NEWS2: Rally Likely To Stall For China Stock Market.
2018-12-06: NEWS1: China Shares May Take Further Damage On Friday.NEWS2: China Shares May Take Further Damage On Friday.NEWS3: Canadian Natural Resources Limited (CNQ) Ex-Dividend Date Scheduled for December 07, 2018.NEWS4: Canadian Natural Resources Limited (CNQ) Ex-Dividend Date Scheduled for December 07, 2018.NEWS5: Occidental Petroleum Corporation (OXY) Ex-Dividend Date Scheduled for December 07, 2018.NEWS6: Occidental Petroleum Corporation (OXY) Ex-Dividend Date Scheduled for December 07, 2018.NEWS7: Pacific Coast Oil Trust (ROYT) Ex-Dividend Date Scheduled for December 07, 2018.NEWS8: Pacific Coast Oil Trust (ROYT) Ex-Dividend Date Scheduled for December 07, 2018.

Answer: Decrease