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:2021-06-18, Stock:PTR, The news for the past five days is as follows:
2021-06-11: NEWS1: Occidental (OXY) to Divest Assets Worth $508M, Reduce Debt.
2021-06-14: nan
2021-06-15: NEWS1: Tap These 3 High-Flying Energy Stocks With More Gains in Store.
2021-06-16: NEWS1: What Makes PetroChina (PTR) a New Strong Buy Stock.NEWS2: Is PetroChina (PTR) a Great Value Stock Right Now?.NEWS3: Top Ranked Value Stocks to Buy for June 16th.NEWS4: Top Ranked Momentum Stocks to Buy for June 16th.
2021-06-17: nan

Answer: Decrease