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:2019-02-27, Stock:RIO, The news for the past five days is as follows:
2019-02-20: NEWS1: U.S. Silica (SLCA) Looks Good: Stock Adds 5.6% in Session.NEWS2: U.S. Silica (SLCA) Looks Good: Stock Adds 5.6% in Session.NEWS3: Freeport Looks Solid as Long-Awaited Supply Disruption Hits.NEWS4: U.S. Silica (SLCA) Looks Good: Stock Adds 5.6% in Session.NEWS5: Glencore Brings the End of Thermal Coal a Step Closer.
2019-02-21: nan
2019-02-22: NEWS1: Will copper’s revival last? China is the X-factor.NEWS2: Top Ranked Income Stocks to Buy for February 22nd.NEWS3: Top Ranked Income Stocks to Buy for February 22nd.NEWS4: Top Ranked Income Stocks to Buy for February 22nd.
2019-02-25: NEWS1: Analyzing Alcoa’s 2019 Outlook.NEWS2: Is Alcoa Undervalued like Analysts’ Estimates Suggest?.NEWS3: Should You Expect More Gains from Alcoa in 2019?.NEWS4: Mining Billionaire Ends Bitter Guinea Dispute After Months of Secret Negotiations.NEWS5: [$$] Beny Steinmetz and Mick Davis eye Guinea’s iron potential.NEWS6: [$$] Beny Steinmetz ends iron ore dispute with Guinea.
2019-02-26: NEWS1: Top Ranked Income Stocks to Buy for February 26th.NEWS2: Top Ranked Income Stocks to Buy for February 26th.NEWS3: The Zacks Analyst Blog Highlights: Boeing, GlaxoSmithKline and Rio Tinto.NEWS4: The Zacks Analyst Blog Highlights: Boeing, GlaxoSmithKline and Rio Tinto.NEWS5: Royal Gold Inks Deal With Cupric to Acquire Silver Stream.NEWS6: Royal Gold Inks Deal With Cupric to Acquire Silver Stream.NEWS7: Top Ranked Income Stocks to Buy for February 26th.NEWS8: The Zacks Analyst Blog Highlights: Boeing, GlaxoSmithKline and Rio Tinto.NEWS9: Royal Gold Inks Deal With Cupric to Acquire Silver Stream.

Answer: Decrease