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:2021-08-06, Stock:PTR, The news for the past five days is as follows:
2021-07-30: NEWS1: Is PetroChina Company (PTR) Stock Outpacing Its Oils-Energy Peers This Year?.
2021-08-02: NEWS1: PetroChina (PTR) Gains As Market Dips: What You Should Know.
2021-08-03: NEWS1: 15 Most Valuable Gas Companies in the World.
2021-08-04: NEWS1: Is PetroChina (PTR) Stock Undervalued Right Now?.
2021-08-05: nan

Answer: Decrease