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:2021-09-20, Stock:NVS, The news for the past five days is as follows:
2021-09-13: NEWS1: BeiGene's (BGNE) BLA for Tislelizumab in ESCC Accepted by FDA.
2021-09-14: nan
2021-09-15: nan
2021-09-16: NEWS1: Novartis reports positive health-related quality of life data for 177Lu-PSMA-617 radioligand therapy in patients with advanced prostate cancer at ESMO 2021.NEWS2: Zymeworks' Zanidatamab Aces Mid-Stage Esophageal Cancer Trial.NEWS3: Are You a Value Investor? This 1 Stock Could Be the Perfect Pick.
2021-09-17: NEWS1: Novartis announces findings from a real-world study of alpelisib demonstrating clinical benefit in people with PIK3CA-Related Overgrowth Spectrum (PROS).NEWS2: Novartis' Prostate Cancer Therapy Linked To Improved Quality Of Life.

Answer: Decrease