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:2020-12-21, Stock:RIO, The news for the past five days is as follows:
2020-12-14: nan
2020-12-15: NEWS1: Rio Tinto’s partnership with SM TAFE, WA Government wins global award.
2020-12-16: NEWS1: Rio Tinto advances climate partnership with China Baowu Steel with US$10 million investment.NEWS2: Rio Tinto confirms development capital and timeline for Oyu Tolgoi underground.NEWS3: Rio Tinto and Nippon Steel Corporation sign climate MOU.
2020-12-17: NEWS1: Rio Tinto’s 2020 Argyle Pink Diamonds Tender delivers a dazzling set of results.NEWS2: Rio Names New CEO as Scrutiny Over Australian Blasts Lingers.NEWS3: Rio Tinto names new boss to move on from aboriginal caves scandal.NEWS4: Rio Tinto appoints Jakob Stausholm as chief executive.
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.

Answer: Decrease