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:2019-06-28, Stock:PTR, The news for the past five days is as follows:
2019-06-21: NEWS1: Here's Why You Should Sell PetroChina (PTR) Stock Right Away.NEWS2: Here's Why You Should Sell PetroChina (PTR) Stock Right Away.NEWS3: Here's Why You Should Sell PetroChina (PTR) Stock Right Away.
2019-06-24: NEWS1: How potential new sanctions against Iran will impact the price of oil.
2019-06-25: NEWS1: Top 5 Chinese Natural Gas Companies (SHI, PTR).
2019-06-26: nan
2019-06-27: nan

Answer: Decrease