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:2021-08-19, Stock:XOM, The news for the past five days is as follows:
2021-08-12: NEWS1: Implied Volatility Surging for Exxon Mobil (XOM) Stock Options.NEWS2: Exclusive-Exxon, Chevron look to make renewable fuels without costly refinery upgrades -sources.
2021-08-13: nan
2021-08-16: NEWS1: Engine No. 1 is all talk, no strategy with Exxon Mobil.
2021-08-17: NEWS1: Is This South America’s Last Great Oil Boom?.NEWS2: Should Amazon (AMZN) Antitrust Concerns Worry Investors?.NEWS3: Maryland Senator sees bipartisan support for carbon tax.NEWS4: Is Exxon Mobil (XOM) Stock Outpacing Its Oils-Energy Peers This Year?.NEWS5: Energy Bear ETFs Break Out After Sluggish Chinese Data.NEWS6: 5 Things You Need To Know About The World’s Hottest Oil Play.
2021-08-18: nan

Answer: Decrease