Investors were feeling on edge Tuesday as uncertainty about President Donald Trump's trade policies looked set to drag down the blue-chip U.S. stock indexes. The Cboe Volatility Index, a widely followed fear gauge that tracks S&P 500 options contracts and trades under the ticker VIX,

Wall Street's main indexes fell on Tuesday after U.S. President Donald Trump's latest plans for pharma tariffs renewed worries of the impact of a trade war, while some downbeat corporate results also weighed on investor sentiment.

Stocks closed lower on Wall Street Monday, breaking a nine-day winning streak, as oil prices hit a four-year low after the OPEC+ group announced plans to increase output. The losses came amid a relatively calm day of mostly mixed trading.

Stocks are slipping on Wall Street and crude prices are falling to a four-year low after the OPEC+ group of oil-producing nations said it plans to increase output.