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Stocks bounced as Federal Reserve Chair Janet Yellen continued to sound a dovish call, though pointed to recent economic weakness as likely transitory. Yellen said labor market weakness in May was likely a leftover from a rough start to the year. Existing-home sales in May rose to their highest level since February 2007 and prices notched their best level ever. Tighter inventory, higher demand and lower interest rates have boosted activity in the sector. Crude oil gave up earlier gains after weekly inventories data showed a far-smaller decline than analysts had expected. A recent recovery to the $50-a-barrel level was largely driven by decreasing U.S. production. FedEx declined after issuing cautious guidance for the next 12 months. The delivery company also reported a loss in its recent quarter, partially tied to large pension costs.

U.S. stocks opened slightly higher on Wednesday as investors braced for remarks from Federal Reserve Chair Janet Yellen, who will address the House Financial Services Committee in Washington. On Tuesday, Yellen testified in front of Senators, reiterating the Fed's cautious approach when it comes to rate hikes going forward. She also said a Brexit could causes significant economic repercussions. Tesla shares were in focus after the electric automaker shocked investors on Tuesday night, announcing a $2.8 billion stock offer for energy company SolarCity . The price Tesla offered represented a 21 percent premium to SolarCity's closing stock price on Tuesday. TheStreet's Scott Gamm reports from Wall Street.

Voter support for the U.K. to remain in the European Union appears to roughly match support to exit. The uncertainty over the 'Brexit' vote on Thursday led to choppy trading through much of the day. Federal Reserve Chair Yellen warned of the repercussions to an exit earlier in the session. Neustar ended the day slightly higher after announcing plans to split into two publicly traded companies. The tax-free spinoff will separate its information services from its order-management services, the latter of which will retain the brand. Deutsche Bank has raised its price target on Viacom to $39, pointing to a board management shakeup as potential upside catalyst. The firm reiterated a HOLD rating. United Continental hopes to boost revenue and cut costs by a cumulative $3.1 billion through to 2018.

Stocks were in flux as Federal Reserve Chair Yellen warned of an uncertain economic outlook. The Fed will continue with a 'cautious approach' to interest rates, particularly with a potential 'Brexit' muddying its outlook, Yellen said in testimony to the Senate. CVS Health announced plans to expand its healthier foods initiative to more than 2,900 stores. The drugstore chain distinguished itself as the healthier alternative after banning tobacco sales in 2014. Carmax fell after missing quarterly estimates on its top- and bottom-line. The auto parts retailer suffered from a rise in expenses that ate into its profit margins. Planet Fitness was lower after announcing a secondary offering of up to 10 million shares of Class A common stock.

U.S. stocks opened higher on Tuesday as investors await testimony from Federal Reserve Chair Janet Yellen and fears of a Brexit continue to fade. Billionaire investor George Soros warned of a currency crisis for the pound if the UK left the EU, similar to the one seen in the early 1990s, according to an op-ed in The Guardian. 'It won't be pretty for the pound - whether it's going to compare with the crisis in the 90s which Soros made his fame, perhaps not,' said Simon Smith, chief economist at FxPro, based in London. Meanwhile, Boeing shares rose after signing an agreement with Iran Air, which intends to buy Boeing jetliners. This comes after burdensome sanctions were lifted following the landmark Iran nuclear deal from last year. TheStreet's Scott Gamm reports from Wall Street.

U.S. stocks rallied on Monday as a new poll suggested the UK may remain in the European Union, ahead of the critical referendum on Thursday. The three major indexes gained over 1 percent. Meanwhile, shares of Anthem and Cigna were in focus after reports said U.S. regulators remained worried about their proposed $48 billion merger, according to The Wall Street Journal, citing concerns about competition. Walt Disney shares rose after its movie 'Finding Dory' brought in $136.2 million over the weekend in North America box office sales, making it the highest-grossing animated film debut ever. TheStreet's Scott Gamm reports from Wall Street.

The stock market rally lost some of its luster by late afternoon, though equities remained sharply higher to close out the session. Better chances of a 'remain' vote in the 'Brexit' referendum helped to fuel gains. Marathon Oil rose after agreeing to acquire PayRock Energy from private-equity firm EnCap Investments. The $888 million deal is expected to close in the third quarter. Twitter was higher after acquiring Magic Pony Technology, a machine-learning developer that specializes in images. Financial terms were not disclosed but sources say the social network paid roughly $150 million. Hertz jumped ahead of its split on Wednesday. Analysts at Morgan Stanley reiterated a BUY rating ahead of the split.

U.S. stocks held onto big gains through the morning session as new 'Brexit' polls suggested the U.K. could remain in the European Union. The outcome of the referendum is announced on Friday. Walmart climbed on reports it is in talks to sell its Chinese e-commerce business to JD.com . The move would likely be part of a strategic partnering that would give Walmart a better shot at competing in the region's retail industry. Federal-Mogul jumped after billionaire Carl Icahn increased his bid to buy a minority stake to $8 dollars a share. Icahn previously offered $7 in February. CVS Health was downgraded to EQUAL WEIGHT at Morgan Stanley. Analysts said the company is facing increased competition in the pharmacy benefit management market.

If UK citizens vote to leave the European Union in a landmark referendum next Thursday, that could push oil prices lower, according to one analyst. 'I think it's likely prices would drop a little bit more,' said Spencer Welch, an oil analyst with IHS, based in London. 'Some of the fall is already being priced into the market right now.' On Friday, oil prices snapped a six-session losing streak with Brent eclipsing $48 a barrel and West Texas Intermediate crossing $47 a barrel. Earlier this month, prices topped $50 a barrel. 'There's uncertainty around what a Brexit might mean - a concern about potentially reduced trade,' Welch said. TheStreet's Scott Gamm reports from Wall Street.

Global stocks are rallying this morning and oil is rebounding. The fears of a 'Brexit' are easing as recent polls give a slight edge to supporters of staying in the European Union. Both sides in the referendum debate suspended campaigning after the murder of a British lawmaker. Gold prices are retreating. Revlon is buying Elizabeth Arden in a cosmetics matchup. The deal is worth $870 million, including debt. Revlon is paying $14 a share, a 50% premium to Elizabeth Arden's closing stock price. The deal allows Revlon to expand more into skincare. Oracle's stock is climbing after the company's cloud business helped it beat Wall Street expectations. Oracle's software business grew 2% but CEO Safra Katz says the company is more focused on its cloud business, which saw growth of 49%. Housing starts for May are reported. The Baker Hughes rig count is released.