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:2018-08-23, Stock:PTR, The news for the past five days is as follows:
2018-08-16: NEWS1: China Shares May Stop The Bleeding On Friday.NEWS2: China Shares May Stop The Bleeding On Friday.NEWS3: Chesapeake Granite Wash Trust (CHKR) Ex-Dividend Date Scheduled for August 17, 2018.NEWS4: Chesapeake Granite Wash Trust (CHKR) Ex-Dividend Date Scheduled for August 17, 2018.NEWS5: Diamondback Energy, Inc. (FANG) Ex-Dividend Date Scheduled for August 17, 2018.NEWS6: Diamondback Energy, Inc. (FANG) Ex-Dividend Date Scheduled for August 17, 2018.
2018-08-17: NEWS1: ECA Marcellus Trust I (ECT) Ex-Dividend Date Scheduled for August 20, 2018.NEWS2: ECA Marcellus Trust I (ECT) Ex-Dividend Date Scheduled for August 20, 2018.NEWS3: Sanchez Midstream Partners LP (SNMP) Ex-Dividend Date Scheduled for August 20, 2018.NEWS4: Sanchez Midstream Partners LP (SNMP) Ex-Dividend Date Scheduled for August 20, 2018.NEWS5: BP Stock: Analysts Are Mostly on the Fence.
2018-08-20: NEWS1: China Bourse May See Continued Support On Tuesday.NEWS2: China Bourse May See Continued Support On Tuesday.NEWS3: ExxonMobil (XOM) Executes SPA for PNG LNG Project With BP.
2018-08-21: NEWS1: China Stock Market May Add To Its Winnings.NEWS2: China Stock Market May Add To Its Winnings.NEWS3: Oil Prices Fall: BP Stock Down 7% in Current Quarter.NEWS4: Panhandle Royalty Company (PHX) Ex-Dividend Date Scheduled for August 22, 2018.NEWS5: Panhandle Royalty Company (PHX) Ex-Dividend Date Scheduled for August 22, 2018.
2018-08-22: NEWS1: China Shares May Extend Wednesday's Losses.NEWS2: China Shares May Extend Wednesday's Losses.NEWS3: Pembina Pipeline Corp. (PBA) Ex-Dividend Date Scheduled for August 23, 2018.NEWS4: Pembina Pipeline Corp. (PBA) Ex-Dividend Date Scheduled for August 23, 2018.

Answer: Decrease