Policymakers at the heart of the Greek government went on the offensive this weekend, stating that the struggling euro zone nation would not need a further loan.
European taxpayers should not be left accountable for the securities that form part of the ECB's new asset-purchase program, according to the Bundesbank chief.
Shares in Air France-KLM fell more than 3 percent as pilots at the French arm of the business began a one-week strike.
The vote is on a knife edge, with three out of four weekend polls suggesting a small victory for the No camp.
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Jeffrey Solomon, CEO of Cowen & Co., says that interest rates would have to move "significantly" for the M&A flow to tail off and touches upon tax inversion deals.
Francis Gaskins, president and editor at IPODesktop.com, says demand for Alibaba is "huge" and that it could price above the current range and discusses the risks for the company going forward.
Andrew Burkly, head of institutional portfolio strategy at Oppenheimer & Co., discusses U.S. monetary policy ahead of the FOMC meeting and discusses the OECD's global growth forecast downgrade.