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:2021-10-21, Stock:COST, The news for the past five days is as follows:
2021-10-14: nan
2021-10-15: NEWS1: Costco (COST) Gains But Lags Market: What You Should Know.NEWS2: Retail companies that are best positioned for the fourth quarter amid supply chain issues.NEWS3: Why shipping delays won't torpedo Walmart.NEWS4: 3 Stocks That Make Your Favorite Snacks.
2021-10-18: NEWS1: Supply chain issues ‘will get better’ for Monster Beverage, analyst says  .
2021-10-19: nan
2021-10-20: NEWS1: Are Institutions Heavily Invested In Costco Wholesale Corporation's (NASDAQ:COST) Shares?.NEWS2: 4 Surefire Stocks to Buy in the Next Bear Market.

Answer: Rise