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:VALE, The news for the past five days is as follows:
2020-05-15: nan
2020-05-18: NEWS1: EMERGING MARKETS-Latam assets surge as commodity prices rally.NEWS2: Brazil maritime trade surplus widens as ports remain open, farm exports strong -ATP.NEWS3: EMERGING MARKETS-Latam stocks, FX surge as commodity prices rally.NEWS4: Brazil's Vale resumes operations at distribution center in Malaysia - filing.
2020-05-19: nan
2020-05-20: NEWS1: EMERGING MARKETS-Rise in commodity prices lift Latam assets as recovery hopes grow.NEWS2: EMERGING MARKETS-Most Latam FX, stocks rally on hopes of strong recovery.
2020-05-21: NEWS1: Interesting VALE Put And Call Options For July 2nd.

Answer: Decrease