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:2021-08-02, Stock:COST, The news for the past five days is as follows:
2021-07-26: NEWS1: Costco will raise membership fees about 8%, Stifel forecasts.
2021-07-27: nan
2021-07-28: NEWS1: Has Costco Wholesale (COST) Outpaced Other Retail-Wholesale Stocks This Year?.
2021-07-29: NEWS1: As CDC reverses its mask guidance, Apple, Costco, Walmart and others have some soul searching to do.NEWS2: Costco's a Bargain for Its Bargains and a Solid Dividend.NEWS3: As CDC reverses mask policy, Apple, Costco, Walmart and others have some soul-searching to do.
2021-07-30: NEWS1: Costco (COST) Gains As Market Dips: What You Should Know.NEWS2: Why This 1 Momentum Stock Could Be a Great Addition to Your Portfolio.

Answer: Decrease