Traders are turning their sights to the eurozone, betting Britain’s decision to leave the EU could put more pressure on the fault lines running through the currency union.

Stock markets in the countries sharing the euro, and the common currency itself, were at the forefront of the steep falls in global markets at the end of last week. But more telling were trading patterns like those during the eurozone's sovereign-debt crisis that ran from 2010 to 2012. Government bonds and shares of weaker economies such as Italy and Spain suffered an even bigger sell-off.