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:2021-03-19, Stock:RIO, The news for the past five days is as follows:
2021-03-12: nan
2021-03-15: NEWS1: Top Ranked Income Stocks to Buy for March 15th.
2021-03-16: nan
2021-03-17: NEWS1: Soaring prices spur miners' hunt for growth, fueling indigenous and investor ire.
2021-03-18: NEWS1: 5 Stocks to Keep an Eye on as Copper Prices Improve.

Answer: Decrease