U.S. stocks open higher as ECB unveils easing measures

U.S. stocks opened slightly higher on Thursday as investors assessed the impact of the European Central Bank's monetary easing measures. The S&P 500 added 2 points, or 0.1%, to 2,081. The Dow Jones Industrial Average gained 13 points, or 0.1%, to 17,744. The Nasdaq Composite began the day up 14 points, or 0.3%, at 5,138.

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