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:2021-04-30, Stock:RIO, The news for the past five days is as follows:
2021-04-23: NEWS1: Is RIO Stock A Buy or Sell?.
2021-04-26: NEWS1: 5 Stocks to Watch as Copper Prices Hit Nine-Year High.NEWS2: Letter: Rio’s pledge on traditional land rights faces big test.
2021-04-27: NEWS1: Battery Boom Prompts Iron Giant Vale to Mull Base Metal Spin-off.NEWS2: Rio Tinto Executive team changes.
2021-04-28: NEWS1: Is Rio Tinto (RIO) Stock Undervalued Right Now?.
2021-04-29: NEWS1: Sanjeev Gupta pursued by Rio Tinto for $50m over Dunkirk smelter sale.

Answer: Decrease