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:2018-09-20, Stock:PTR, The news for the past five days is as follows:
2018-09-13: NEWS1: China Shares May Test Resistance At 2,700 Points.NEWS2: China Shares May Test Resistance At 2,700 Points.NEWS3: Shell’s 50-Day and 200-Day Moving Averages Are Equal.NEWS4: Shell Has Fallen 7% in the Third Quarter.
2018-09-14: NEWS1: Shell Stock: What to Expect by the End of Q3 2018.
2018-09-17: NEWS1: Losing Streak Likely To Continue For China Shares.NEWS2: Losing Streak Likely To Continue For China Shares.NEWS3: Shell’s Short Interest Has Risen Marginally.
2018-09-18: NEWS1: China Stock Market Draws Firm Lead For Wednesday.NEWS2: China Stock Market Draws Firm Lead For Wednesday.
2018-09-19: NEWS1: China Shares May See Continued Support.NEWS2: China Shares May See Continued Support.

Answer: Decrease