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:2019-07-15, Stock:PTR, The news for the past five days is as follows:
2019-07-08: NEWS1: Energy Sector Update for 07/08/2019: TRNX,RCON,PTR,LONE,MGY.NEWS2: Energy Sector Update for 07/08/2019: TRNX,RCON,PTR,LONE,MGY.NEWS3: Energy Sector Update for 07/08/2019: RCON,PTR,LONE,MGY.NEWS4: Energy Sector Update for 07/08/2019: RCON,PTR,LONE,MGY.
2019-07-09: NEWS1: An Oil Behemoth Is Worth Less Than Its Energy Reserves In the Ground.
2019-07-10: nan
2019-07-11: NEWS1: Today's Pickup: A Once $1 Trillion Dollar Oil Company Is Now Valued 80 Percent Lower.
2019-07-12: NEWS1: Can Big Spending Boost Lift China's Oil & Gas Output?.

Answer: Decrease