The spread between French and German bond yields has surged to a new high since the European debt crisis, and the ECB faces a "nightmare scenario": should it intervene to rescue the market or protect its credit?

French bond spreads have surged to their highest level since the European debt crisis, forcing the European Central Bank to make the difficult decision of whether to use crisis intervention tools, and the tension between its credibility and market stability is rapidly intensifying.

The 10-year yield spread between France and Germany has widened to about 150 basis points, the highest since the European debt crisis in 2012, while the 5-year credit default swap (CDS) in France has risen to about 87 basis points, the highest since the beginning of 2013 ; this widening was completed within a week, the fastest since 2011.

The widening spread between French and German bond yields has fueled growing speculation about whether the European Central Bank will use its Transmission Protection Instrument (TPI).

The TPI tool refers to the European Central Bank's (ECB) ability to purchase government bonds issued by a country on the secondary market if it determines that the country's bonds have experienced an "unjustified and disorderly" market sell-off. However, the root of France's current predicament lies precisely in its real, out-of-control fiscal deficit and political deadlock, making the determination of the conditions for its use extremely difficult.

Meanwhile, eurozone inflation is approaching 4% due to the impact of the Middle East conflict. The European Central Bank has raised interest rates for several consecutive years this year. If it were to restart bond purchases and ease financing conditions at this time, it would directly contradict its monetary tightening stance.

Currently, European Central Bank officials have not signaled any intervention, but the situation could become further complicated if market pressure continues to spread to highly indebted countries such as Italy.

Interest rate spreads hit a new high since the European debt crisis, reigniting the debate over the future of the TPI.

The risk premium of French government bonds relative to German government bonds has risen to its highest level since the 2012 European debt crisis, forcing the market to re-examine the European Central Bank's response options. The TPI was created during the Italian bond market turmoil in 2022, and its design logic is that the existence of the tool itself is sufficient to deter speculative selling, without the need for actual use.

However, this deterrent logic is facing a test. Piet Christiansen, chief strategist at Danske Bank, points out: "Given France's fiscal stance and political uncertainty, widening interest rate spreads are reasonable. But this is precisely what confuses the market regarding the ECB's judgment—if it has hindered the transmission of monetary policy, that is the ECB's responsibility; if it hasn't, then the market should be allowed to price in the fundamentals itself, without intervention."

According to the established terms of the TPI, the triggering condition must be that market volatility is "unfounded and disorderly" and poses a substantial threat to the transmission of monetary policy. France's current predicament clearly does not meet the former condition, which puts the European Central Bank in a dilemma—intervention could be interpreted as helping the government finance its deficit, damaging the central bank's independence and credibility.

Officials maintain their stance on price stability; conditions for intervention are not yet ripe.

European Central Bank officials have so far been cautious in their rhetoric, sending no indication of any intention to intervene in the market. When asked about the potential use of the TPI this week, Bundesbank President Joachim Nagel stated unequivocally: " My role on the Governing Council is to fulfill my mandate. Price stability is the core issue, and this has nothing to do with certain interest rate spreads."

In her speech in Dublin last month, European Central Bank President Christine Lagarde took a relatively relaxed stance on the pressures on the French bond market, emphasizing the broader context:

"We haven't seen any disorderly fluctuations, nor any signs of tension. This is a global movement affecting all bonds, especially long-term bonds, with multiple causes, but there has been no disorderly failure of market function."

Olli Rehn, Governor of the Bank of Finland, explicitly placed the responsibility for addressing the issue on national governments: "Higher borrowing costs, growing spending demands, and limited fiscal space could exacerbate sovereign risks and expose vulnerabilities in other parts of the financial system. These risks underscore the necessity of continued vigilance and the advancement of fiscal integration."

French central bank governor Emmanuel Moulin also warned that the European Central Bank has no "magic bullet" for the French economy.

Quantitative tightening may be a compromise option, but its effectiveness remains questionable.

Before the full implementation of TPI, some market participants believe that stopping "quantitative tightening"—that is, stopping the natural reduction of bond holdings upon maturity—may be the first step in the ECB's easing measures.

Ana Boata, chief economist at Allianz Trade, said: "There is clearly room for maneuver in this area. Take France as an example; the monthly maturities are around €5 billion, accounting for 20% of new issuances, which is by no means negligible."

However, the inflationary backdrop also limits this option. Fluctuations in energy and commodity prices triggered by the Middle East conflict have pushed Eurozone inflation close to 4%, and the European Central Bank has already raised interest rates in June and September. In this context, easing financing conditions again would logically run counter to the current tightening cycle.

The risk of contagion is a key trigger, and Italy's actions are being closely watched.

According to Bloomberg analysts Jean Dalbard and Simona Delle Chiaie, the key trigger for the TPI (Transnational Producer Index) is whether pressure in the French bond market spreads to other Eurozone sovereign debt or asset classes. Currently, there are no clear signs of contagion, but Italian bond spreads are widening, although they remain relatively low compared to historical highs.

Against this backdrop, the Italian government under Prime Minister Giorgia Meloni made temporary adjustments to its budget this week, cutting defense spending to reduce the fiscal deficit to below the EU's 3% GDP red line, demonstrating a clear awareness of market pressures.

In contrast, France only plans to reduce its deficit from 5.4% in 2026 to 5% in 2025, a far less significant reform effort.

Anxiety is also rising among Brussels officials. According to an unnamed EU official, member states have not fully grasped the severity of the situation and continue to seek to ease EU fiscal constraints, while what the market needs is precisely policy predictability.

TPI has never been actually used, but its theoretical power should not be underestimated.

Despite the conservative stance of European Central Bank officials, some market participants still believe that the ECB will have no choice but to act should the situation spiral out of control.

Marion Le Morhedec, Chief Investment Officer of Fixed Income at Fidelity International, said: "The ECB is paying close attention to this and has been in communication with market participants, including hedge funds. They really want to understand what's happening and are prepared to take all necessary measures to avoid major turmoil."

Scope Ratings sovereign analyst Eiko Sievert noted, "TPI has never been actually tested, but theoretically it's a very powerful tool."

The key challenge for the European Central Bank in the coming weeks will be whether the conditions for using the tools and the political will are in place before market pressures spiral out of control.

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