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:2019-12-20, Stock:ECL, The news for the past five days is as follows:
2019-12-13: NEWS1: ECOLAB NL 11 B.V. -- Moody's changes Ecolab's outlook to positive.
2019-12-16: nan
2019-12-17: nan
2019-12-18: nan
2019-12-19: NEWS1: Ecolab will merge 'upstream' business with Apergy in $4.4B deal.NEWS2: Apergy to combine with Ecolab's upstream energy business in a deal valued at $4.4 bln.NEWS3: Apergy to Combine with Ecolab’s Upstream Energy Business in a Tax-Free Transaction, Creating a Global Leader in Production-Optimization Solutions.NEWS4: Apergy to Combine With Ecolab’s Upstream Energy Business in a Tax-Free Transaction, Creating a Global Leader in Production-Optimization Solutions.

Answer: Decrease