Midday Report: Weight Watchers Gets Oprah Bump; U.S. Stocks Rise

U.S. stocks followed crude oil higher as both a massive Canadian wildfire and fighting in Libya threatened disrupted output. The energy sector was the best performer on Wall Street. Weight Watchers (WTW) - Get Report rose after increasing its full-year outlook. The weight loss company in which Oprah Winfrey holds a 10 percent stake reported a bump in membership in its first quarter, its first increase in four years. Fitbit (FIT) - Get Report slumped after issuing a disappointing second-quarter outlook. The fitness tracker company spent heavily to drive sales in its recent quarter. SeaWorld (SEAS) - Get Report fell as ballooning expenses and declining theme park attendance caused first-quarter losses to widen. The aquatic theme park has endured roughly three years of harsh criticism over the captivity and breeding programs of its orcas. TheStreet's Keris Lahiff reports from Wall Street.