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:2019-06-21, Stock:RIO, The news for the past five days is as follows:
2019-06-14: NEWS1: Supply or Demand: What Will Weigh on Iron Ore Prices More?.NEWS2: Rio Tinto reveals government contracts.
2019-06-17: NEWS1: Miners Pull ASX 200 Down, NZX 50 and Singapore Are Down Too.
2019-06-18: NEWS1: New Strong Buy Stocks for June 18th.NEWS2: New Strong Buy Stocks for June 18th.NEWS3: Iron Ore Prices Surge to 5-Year High on Supply Crunch Fears.NEWS4: Iron Ore Prices Surge to 5-Year High on Supply Crunch Fears.NEWS5: Iron Ore Prices Surge to 5-Year High on Supply Crunch Fears.NEWS6: New Strong Buy Stocks for June 18th.
2019-06-19: NEWS1: Are You Looking for a Top Momentum Pick? Why Rio Tinto (RIO) is a Great Choice.NEWS2: Are You Looking for a Top Momentum Pick? Why Rio Tinto (RIO) is a Great Choice.NEWS3: Rio Tinto’s Production Cut Could Propel Iron Ore Prices.NEWS4: Are You Looking for a Top Momentum Pick? Why Rio Tinto (RIO) is a Great Choice.NEWS5: Investors Whipsawed as Iron Ore’s Dramatic Year Continues.NEWS6: Pre-Market Most Active for Jun 19, 2019 :  MLNT, MGI, VALE, AXTA, CALA, RIO, AMD, NOK, CLF, CHWY, BYND, FB.NEWS7: Pre-Market Most Active for Jun 19, 2019 :  MLNT, MGI, VALE, AXTA, CALA, RIO, AMD, NOK, CLF, CHWY, BYND, FB.NEWS8: ASX Inched Closer to New High, KOSPI and Singapore Gained Big.NEWS9: Rio Tinto cuts production guidance for most important commodity.
2019-06-20: NEWS1: Rio Tinto's Autonomous Trains Can't Work In North America...Yet.NEWS2: RPT-COLUMN-Australian resource companies are becoming renewable energy believers: Russell.NEWS3: Rio Tinto Renews Work on Giant Guinea Iron Ore Deposit.NEWS4: COLUMN-Australian resource companies are becoming renewable energy believers: Russell.

Answer: Decrease