Italy's reform rumble: The referendum that's worrying the markets

It’s been called the referendum that could lead to the death of the euro. Voters in Italy will go to the polls on December 4 to cast their ballot on a major overhaul of the country's constitution. The markets are watching with concern: a “no” vote would be seen as a boost to anti-EU parties. Why is that? How significant are the reforms promoted by Prime Minister Matteo Renzi? Is this really a vote about the economy?