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:2018-01-29, Stock:COST, The news for the past five days is as follows:
2018-01-22: NEWS1: Amazon Go Threatens This Wal-Mart Chain, Five Others: Expert.NEWS2: Amazon Go Threatens This Wal-Mart Chain, Five Others: Expert.NEWS3: 7 Quick Ways to Boost Your Wealth in 2018: Cut Your Food Spending.NEWS4: Energy Giant Breaks Out; These 2 Other Leaders Approach Buy Points.NEWS5: Energy Giant Breaks Out; These 2 Other Leaders Approach Buy Points.NEWS6: 3 Extra-Special Dividend Stocks You Should Know About.NEWS7: 3 Extra-Special Dividend Stocks You Should Know About.NEWS8: 3 Extra-Special Dividend Stocks You Should Know About.NEWS9: Amazon Go cashier-free convenience store opens for business.NEWS10: Valuation, Not Speculation, Should Drive Amazon.com, Inc. Stock.NEWS11: Will Office Depot's (ODP) Efforts Prop Up the Stock in 2018?.NEWS12: Will Office Depot's (ODP) Efforts Prop Up the Stock in 2018?.NEWS13: Will Office Depot&apos;s (ODP) Efforts Prop Up the Stock in 2018?.
2018-01-23: NEWS1: 10 Ways AI Has Improved Your Smartphone.NEWS2: 10 Ways AI Has Improved Your Smartphone.NEWS3: Huggies' owner Kimberly-Clark to slash 5,000 jobs, close 10 factories.NEWS4: Amazon Prime Price Hike Will Bring in $300M More Annually: Cowen.
2018-01-24: NEWS1: What’s Next after Amazon Go Goes Public?.NEWS2: Solid Comps, Strategic Initiatives to Aid Costco's Top Line.NEWS3: Solid Comps, Strategic Initiatives to Aid Costco's Top Line.NEWS4: Solid Comps, Strategic Initiatives to Aid Costco&apos;s Top Line.NEWS5: Amazon's Whole Foods Division Gets Savage Review by This Stock Analyst.
2018-01-25: NEWS1: Notable ETF Inflow Detected - XLP, COST, MO, CVS.NEWS2: Notable ETF Inflow Detected - XLP, COST, MO, CVS.NEWS3: What the New Amazon Prime Charges Look Like.NEWS4: See what the IHS Markit Score report has to say about Costco Wholesale Corp..NEWS5: Killing Costco and Saving Wine.NEWS6: Kroger Hunts for an E-commerce Acquisition, but It May Have the Wrong Target.NEWS7: Kroger Hunts for an E-commerce Acquisition, but It May Have the Wrong Target.NEWS8: Kroger Hunts for an E-commerce Acquisition, but It May Have the Wrong Target.NEWS9: Now's a good time to buy consumer goods stocks.
2018-01-26: NEWS1: International Growth Is Revitalizing Starbucks Corporation Stock.NEWS2: International Growth Is Revitalizing Starbucks Corporation Stock.

Answer: Decrease