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:2018-09-24, Stock:COST, The news for the past five days is as follows:
2018-09-17: NEWS1: Costco’s Big Run Raises Valuation Worries.NEWS2: Are Insiders Bearish About Costco Wholesale Corporation (NASDAQ:COST)?.NEWS3: Costco (COST) Takes Lead, Stays Ahead of Industry in 6 Months.NEWS4: Costco (COST) Takes Lead, Stays Ahead of Industry in 6 Months.NEWS5: Bullish Case For Costco, Sprouts Comes To An End At Barclays.NEWS6: Costco (COST) Takes Lead, Stays Ahead of Industry in 6 Months.NEWS7: Costco's 'parabolic charts only end one way ... badly,' says top market watcher.
2018-09-18: NEWS1: No Rating Changes for Kroger for Now.NEWS2: Why Analysts Are Downgrading Costco Stock.NEWS3: Better Buy: Costco Wholesale Corporation vs. Target.NEWS4: Better Buy: Costco Wholesale Corporation vs. Target.NEWS5: See what the IHS Markit Score report has to say about Costco Wholesale Corp..NEWS6: Better Buy: Costco Wholesale Corporation vs. Target.
2018-09-19: NEWS1: Mastercard and Visa Settle Card Fee Suit.NEWS2: Why Costco’s Bull Run Will End Soon: Piper Jaffray.
2018-09-20: NEWS1: Have Analysts Become Too Bearish on Costco Stock?.NEWS2: A Look At Costco's Valuation.NEWS3: A Look At Costco's Valuation.NEWS4: See what the IHS Markit Score report has to say about Costco Wholesale Corp..
2018-09-21: NEWS1: Should You Buy Kroger Stock After Its No-Good, Terrible Month?.NEWS2: Could Costco Wholesale Corporation Be a Millionaire-Maker Stock?.NEWS3: Could Costco Wholesale Corporation Be a Millionaire-Maker Stock?.NEWS4: Could Costco Wholesale Corporation Be a Millionaire-Maker Stock?.

Answer: Decrease