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:2021-05-19, Stock:BHP, The news for the past five days is as follows:
2021-05-12: nan
2021-05-13: NEWS1: Mining Stocks: How Copper, The Red Metal, Is Becoming The 'Green Metal'.NEWS2: BHP, Rio, Vale launch contest to cut haul truck emissions.
2021-05-14: NEWS1: BHP Remote Copper Operators Move Closer to Strike in Chile.NEWS2: BHP Group (BHP) Rides on High Iron Prices Amid High Costs.
2021-05-17: NEWS1: Mining Stocks Gleam As Copper, The Red Metal, Becomes The 'Green Metal'.NEWS2: Canada potash project may cost BHP growth elsewhere, say investors.NEWS3: Canada potash project may cost BHP growth elsewhere, say investors.
2021-05-18: NEWS1: BHP Billiton Composite Rating Rises To 96 Amid Continuing Robust Sales, Profit Growth.

Answer: Decrease