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:2019-10-22, Stock:COST, The news for the past five days is as follows:
2019-10-15: NEWS1: Amazon Stock Will Thrive By (Almost) Defying Numerical Assumptions.NEWS2: Ross Stores Opens 42 Outlets for Q3, Completes FY19 Target.NEWS3: Costco Stock Surged to a Record, and One Executive Is Unloading Shares.
2019-10-16: NEWS1: 4 Ways To Reward Yourself For Grocery Shopping.NEWS2: The Really Dumb Reason Why Target Stock Is at Risk.NEWS3: Why a Longtime Big Investor Has Lost Faith in Buffett and Berkshire.
2019-10-17: NEWS1: Stocks To Buy: Is It Time To Buy Or Sell These Large-Cap Stocks?.NEWS2: Dollar Tree Hits 52-Week High: What's Driving the Stock?.
2019-10-18: NEWS1: Costco (COST) Gains As Market Dips: What You Should Know.NEWS2: Costco Wholesale Corporation Announces Quarterly Cash Dividend.NEWS3: Retail-Discount Stores Outlook: Prospects Look Promising.NEWS4: Coca-Cola Stock Near All-Time High After Solid Quarter.
2019-10-21: NEWS1: Costco Wholesale, IBD Stock Of The Day, Nears Buy Point From This Rare, Powerful Pattern.NEWS2: What to watch when Amazon reports earnings Thursday.NEWS3: Here's what may ruin the holiday season for most retailers.NEWS4: TGT vs. COST: Which Stock Should Value Investors Buy Now?.

Answer: Decrease