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:2018-09-21, Stock:BRK-A, The news for the past five days is as follows:
2018-09-14: NEWS1: Notable ETF Inflow Detected - SPY, AMZN, BRK.B, JPM.NEWS2: Notable ETF Inflow Detected - SPY, AMZN, BRK.B, JPM.
2018-09-17: NEWS1: XLF, UDN: Big ETF Outflows.NEWS2: XLF, UDN: Big ETF Outflows.
2018-09-18: nan
2018-09-19: nan
2018-09-20: NEWS1: Markel (MKL) to Acquire Brahmin Through Markel Venture.NEWS2: Markel (MKL) to Acquire Brahmin Through Markel Venture.NEWS3: Why You Should Add Selective Insurance to Your Portfolio.NEWS4: Why You Should Add Selective Insurance to Your Portfolio.NEWS5: Why Berkshire Hathaway Inc. (BRK.B) is a Top Pick for Momentum Investors.NEWS6: Why Berkshire Hathaway Inc. (BRK.B) is a Top Pick for Momentum Investors.

Answer: Decrease