Italian bonds have witnessed one of their worst trading weeks since the euro zone sovereign debt crisis, with many traders getting a stark reminder of the volatility that once characterized markets in the region.
On Friday, two-year Italian bond yields rose 35 basis points in one day — almost equivalent to the entire range of the year for U.S. 10-year Treasurys. This was the weakest session in five years and continued a month that's seen these yields rise 70 basis points in total.
Yields move inversely to a bond's price and a spike higher is seen as investors feeling more concerned about lending to Italy's government. More specifically, traders usually sell short-maturity paper when there are growing credit risk concerns at a sovereign level.
The original catalyst for the selling came from the populist parties hoping to take control of Italy after inconclusive elections in March. Lega and the Five Star Movement (M5S) plan to issue short-term bills to finance state activity in their economic policy proposals. Market participants were taken aback and many have interpreted that initiative as laying the foundation for a potential parallel currency in the future, further amplifying the potential new government's collision course with the rest of Europe.