U.S. stocks reversed early losses, finishing in positive territory Tuesday after Federal Reserve Chairwoman Janet Yellen emphasized that policy makers would take a cautious approach to raising interest rates. The S&P 500 gained 17.99 points, or 0.9%, to 2,055.03. The Dow industrials gained 98.27 points, or 0.6%, to 17,633.66, with Apple Inc. and Microsoft Corp. leading the blue-chip gauge higher. Both the S&P and Dow logged their highest closes of the year. The Nasdaq gained 79.84 points, or 1.7%, to 4,846.62 -- bolstered by strong gains among tech stocks.
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