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:2020-12-28, Stock:RIO, The news for the past five days is as follows:
2020-12-18: NEWS1: 4 Mining Stocks to Keep an Eye on as Iron Ore Prices Surge.NEWS2: China-Australia relations: Rio Tinto makes anti-pollution deal with world's largest steel producer amid iron ore price controversy.NEWS3: New Rio Boss Is a Crisis Veteran Facing His Biggest Test Yet.
2020-12-21: NEWS1: Top Ranked Momentum Stocks to Buy for December 21st.NEWS2: New Strong Buy Stocks for December 21st.
2020-12-22: NEWS1: The Zacks Analyst Blog Highlights: Rio Tinto, Fortesque and Ternium.
2020-12-23: nan
2020-12-24: NEWS1: Top Ranked Income Stocks to Buy for December 24th.NEWS2: Joint statement from PKKP and Rio Tinto.

Answer: Decrease