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:2020-05-22, Stock:PFE, The news for the past five days is as follows:
2020-05-15: NEWS1: Why Sarepta Has A Leg Up On Pfizer With A Rival Gene Therapy: Analysts.NEWS2: Pfizer Posts Positive Data from Duchenne Muscular Dystrophy Candidate, but Still Trails Rival Sarepta Therapeutics.NEWS3: Trump unveils vaccine effort, says country will be back on its feet with or without one.NEWS4: Sarepta Gains After Pfizer DMD Gene Therapy Data Fall Short.NEWS5: Can Pfizer Undercut Sarepta Therapeutics With A Rival Gene Therapy?.NEWS6: Pfizer to launch late stage DMD gene therapy trial despite hospitalizations.NEWS7: Pfizer’s New Phase 1b Results of Gene Therapy in Ambulatory Boys with Duchenne Muscular Dystrophy (DMD) Support Advancement into Pivotal Phase 3 Study.
2020-05-18: NEWS1: We anticipate a U-Shaped to Swoosh-Shaped recovery: Strategist.NEWS2: Moderna COVID-19 vaccine data is ‘baby-step’ in right direction: Expert.NEWS3: Here’s what it will take for the stock market to hit a new record within 2 months.NEWS4: Moderna Soars: Biotech ETFs in Focus.NEWS5: Pfizer Inc. -- Moody's assigns A1 to Pfizer's notes; on review for downgrade.NEWS6: Sarepta Surges on Rival Pfizer's DMD Gene Therapy Study Data.NEWS7: Who Is Winning the COVID-19 Vaccine Race?.NEWS8: Pfizer Reports Efficacy & Safety Data on DMD Gene Therapy.NEWS9: Pfizer Just Began A Coronavirus Vaccine Test — Is PFE Stock A Buy?.NEWS10: Glaxo-held firm ends HIV study early as injectable shows higher efficacy than daily pill.
2020-05-19: NEWS1: Johns Hopkins doctor on Trump's preventative hydroxychloroquine use: 'hopefully other people will not follow this example'.NEWS2: GlaxoSmithKline, Pfizer, and Shionogi's HIV Prevention Candidate Outperforms Gilead's Truvada.NEWS3: Glaxo's Long-Acting HIV Injection Effective Than Daily Pills.NEWS4: A Covid-19 Vaccine Could Be Worth Billions for Moderna and Its Rivals.NEWS5: Pfizer Seeks To Raise $4 Billion From Debt Sale.NEWS6: What's Behind Axsome Therapeutics' Miracle Pipeline?.NEWS7: What's Behind Axsome Therapeutics' Miracle Pipeline?.NEWS8: Market pros have high hopes for a COVID-19 vaccine: Morning Brief.NEWS9: Pfizer Prices $4,000,000,000 Debt Offering.
2020-05-20: NEWS1: Pfizer Participates in Funding for Biotech Startup Amplyx.NEWS2: FDA Approves New Prostate Cancer Treatment From AstraZeneca and Merck.NEWS3: GSK ties up with gene editing start-up Mammoth for COVID-19 test.NEWS4: Sorrento Therapeutics CEO: We are not a 'pump and dump' scheme.NEWS5: Better Buy: GlaxoSmithKline vs. Pfizer.NEWS6: J&J to Stop Sale of Talc-Based Baby Powder in North America.
2020-05-21: NEWS1: Fmr. CDC Official: 'we’re not cutting any corners' on COVID-19 vaccine development.NEWS2: For Moderna, a Coronavirus Vaccine Would Be the “Tip of the Iceberg”.NEWS3: AstraZeneca/Merck's Lynparza Get FDA Nod for Prostate Cancer.

Answer: Rise