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:2021-09-28, Stock:ABT, The news for the past five days is as follows:
2021-09-21: NEWS1: U.S. government to buy point-of-care COVID-19 tests from Abbott, Celltrion -source.NEWS2: Abbott's (ABT) Portico With FlexNav System Gets FDA Approval.
2021-09-22: NEWS1: Abbott (ABT) Stock Sinks As Market Gains: What You Should Know.
2021-09-23: NEWS1: Abbott Hosts Conference Call for Third-Quarter Earnings.
2021-09-24: nan
2021-09-27: NEWS1: 10 Best Biotech Stocks Under $10.

Answer: Decrease