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:2021-08-23, Stock:COST, The news for the past five days is as follows:
2021-08-16: nan
2021-08-17: NEWS1: Costco (COST) Stock Moves -0.11%: What You Should Know.NEWS2: Delta variant hasn't changed consumer behavior: Walmart CFO.NEWS3: 2 Solid Retail Stocks to Put in Your Shopping Basket.
2021-08-18: nan
2021-08-19: NEWS1: COVID-19 Delta variant fears aren't stopping retailers from giving away money, again.NEWS2: 3 Stocks I'll Hold Forever.
2021-08-20: NEWS1: Costco Wholesale Stock Shows Market Leadership With Jump To 83 RS Rating.

Answer: Decrease