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:2018-10-19, Stock:RIO, The news for the past five days is as follows:
2018-10-12: NEWS1: Alcoa: What Can Investors Expect?.NEWS2: How The Pieces Add Up: SLX Headed For $53.NEWS3: How The Pieces Add Up: SLX Headed For $53.NEWS4: Alcoa: Should You Be Bottom Fishing?.
2018-10-15: NEWS1: Asian Markets Mostly Higher With Modest Gains.NEWS2: Asian Markets Mostly Higher With Modest Gains.NEWS3: Australian Market Advances.NEWS4: Australian Market Advances.NEWS5: Rio Tinto Q3 Iron Ore Shipments Down 5%.NEWS6: Rio Tinto Q3 Iron Ore Shipments Down 5%.
2018-10-16: NEWS1: Asian Markets In Positive Territory.NEWS2: Asian Markets In Positive Territory.NEWS3: Australian Market Extends Gains.NEWS4: Australian Market Extends Gains.NEWS5: Has Freeport-McMoran Stock Finally Bottomed Out?.NEWS6: Alcoa: Key Updates Markets Might Watch.NEWS7: Can Alcoa’s Q3 Earnings Improve Its Dismal Stock Performance?.
2018-10-17: NEWS1: 5 Companies To Watch In The Next Commodity Boom.NEWS2: Asian Markets Decline After Fed Hints At More Rate Hikes.NEWS3: Asian Markets Decline After Fed Hints At More Rate Hikes.NEWS4: Australian Market Declines.NEWS5: Australian Market Declines.NEWS6: Freeport CEO May Be Ready to Sell, But Are There any Buyers?.NEWS7: Are Mining Companies Bullish on Copper?.NEWS8: How the Markets Are Valuing Freeport-McMoRan.
2018-10-18: NEWS1: Asian Markets Mostly Lower After China GDP Data Disappoints.NEWS2: Asian Markets Mostly Lower After China GDP Data Disappoints.NEWS3: Australian Market Declines.NEWS4: Australian Market Declines.

Answer: Decrease