U.S. stocks rallied on Monday, as investors continued to analyze comments from Federal Reserve Chair Janet Yellen, who delivered a speech on Friday. Harley Davidson (HOG) - Get Report shares slipped 2.3 percent after Longbow analysts downgraded the stock to UNDERPERFORM from NEUTRAL amid a lack of upside catalysts in the near-term. Shares of capital equipment company KLA-Tencor (KLAC) - Get Report rose 1.8 percent after Cowen analysts upgraded the stock to OUTPERFORM from MARKET PERFORM with an $80 price target. The stock trades near $68.71. Starbucks (SBUX) - Get Report said it will open its first location in Trinidad, an island in the Caribbean. Starbucks first came to the region with its launch of a San Juan, Puerto Rico cafe, back in 2002. TheStreet's Scott Gamm reports from Wall Street.