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:2021-02-05, Stock:RIO, The news for the past five days is as follows:
2021-01-29: nan
2021-02-01: NEWS1: Shaky Iron Market Turns to Vale for Final Piece of Supply Puzzle.
2021-02-02: nan
2021-02-03: nan
2021-02-04: NEWS1: Rio Tinto board could face pressure on Indigenous broken promise claim.NEWS2: Rio chairman accused of breaking promise over rock cave blasts.

Answer: Rise