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:2021-10-07, Stock:Unp, The news for the past five days is as follows:
2021-09-30: NEWS1: Union Pacific Elects Sheri Edison to Board of Directors.NEWS2: Ports Tangle Won't Clear Until COVID is Under Control.
2021-10-01: nan
2021-10-04: NEWS1: Union Pacific Upgraded on Valuation; Barclays Sees Stronger Demand.
2021-10-05: nan
2021-10-06: nan

Answer: Decrease