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:2018-12-19, Stock:RIO, The news for the past five days is as follows:
2018-12-12: NEWS1: Is the Party Over for Commodities as China Steel Feels the Heat?.NEWS2: China’s Iron Ore Imports Have Fallen, Outlook Remains Muted.NEWS3: European markets climb higher; British PM faces confidence vote; Pandora shares fall 8%.NEWS4: [$$] Former Xstrata CEO Mick Davis joins board of coal start-up Arq.
2018-12-13: NEWS1: Asian Markets Lower On Weak China Economic Data.NEWS2: Asian Markets Lower On Weak China Economic Data.NEWS3: Australian Market Declines.NEWS4: Australian Market Declines.NEWS5: Will Chinese Steel Mills’ Pains Intensify with the Trade War?.NEWS6: Why China’s Steel Production Can’t Buck the Downtrend for Long.
2018-12-14: NEWS1: Why China Needs More Than a Trade War Truce to Buck the Slowdown.NEWS2: [$$] Gupta completes $500m deal for Dunkerque smelter.
2018-12-17: NEWS1: Should You Buy Rio Tinto plc (RIO)?.NEWS2: Does Rio Tinto plc’s (LON:RIO) P/E Ratio Signal A Buying Opportunity?.
2018-12-18: NEWS1: Asian Markets Mostly Higher Ahead Of Fed Decision.NEWS2: Asian Markets Mostly Higher Ahead Of Fed Decision.NEWS3: Australian Market Extends Losses.NEWS4: Australian Market Extends Losses.NEWS5: This Odd Couple Plots to Save $100 Billion Gold Mining Business.

Answer: Decrease