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:2020-07-28, Stock:RIO, The news for the past five days is as follows:
2020-07-21: NEWS1: Australia's iron ore exports to China strong, but weak global demand indicates mixed coronavirus recovery.
2020-07-22: NEWS1: Rio Tinto files complaint with Icelandic Competition Authority over ISAL smelter power agreement.NEWS2: Australia shares fall as record virus cases dent investor sentiment.
2020-07-23: NEWS1: Top Ranked Income Stocks to Buy for July 23rd.
2020-07-24: nan
2020-07-27: NEWS1: Rio Tinto reveals maiden Resource at Winu and new discovery.NEWS2: Top Ranked Income Stocks to Buy for July 27th.

Answer: Decrease