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:2021-05-12, Stock:PTR, The news for the past five days is as follows:
2021-05-05: nan
2021-05-06: NEWS1: Should Value Investors Buy PetroChina (PTR) Stock?.
2021-05-07: nan
2021-05-10: NEWS1: Exxon Breaks Out Before Easing; Which Of These 4 Oil Stocks Still In Buy Range?.NEWS2: PetroChina (PTR) Q1 Earnings Show Signs of a Turnaround.
2021-05-11: nan

Answer: Decrease