France sells €12 billion, pays more

France's debt agency sold all €11.999 billion of long-term bonds it offered on 1 October and drew bids worth €27.487 billion (ABC Bourse, Reuters auction table). Investors still want French debt, but they are charging more for it. On a bond maturing in November 2036, buyers demanded a yield of 4.93%, up from 4.23% when the same bond was sold on 3 September (Reuters auction table).

A bond's yield is the yearly return a buyer locks in for the price they pay. The coupon, the fixed interest France promises each year, did not change. Investors simply paid less for each bond, which raises their return and raises what France pays for the money it raised.

Finance Minister Roland Lescure presented the sale as proof that investors still trust France. A Natixis Investment Managers strategist told Le Monde that bids worth more than twice the amount offered sit toward the low end of normal (Le Monde). The sale shows something narrower than trust: France found buyers that morning, at a higher price.

Why the gap with Germany widened

The same pressure showed up where existing bonds change hands. There, France's ten-year yield came close to 5% on 1 October (La Tribune). The next day, the gap between what France and Germany pay to borrow for ten years passed 150 basis points (1.5 percentage points), the widest since late 2011 (Reuters).

Part of that move came from Germany. German bonds rose against the trend as investors looked for a safe place to park money (dpa-AFX), and rising prices push Germany's yields down. The wider gap therefore reflects demand for Germany as well as worry about France. We traced how the sell-off spread across markets in earlier coverage (To Brief).

How the higher rate reaches the budget

Most French debt pays fixed coupons, so higher yields leave bonds already sold untouched. Each new bond carries its auction price from the day it is sold. The total cost builds as old bonds mature and are replaced at today's rates, and roughly €197.4 billion falls due in 2027 (AFT).

That is why a lasting rise in rates hurts more each year. The French Senate's analysis of such a rise found the extra interest cost growing year after year as more debt rolls over (French Senate). Its figures depend on how large a rise it assumed, so they are no forecast of this week's move.

The bill is already large before any further increase. The government projects interest costs rising from €79.2 billion in 2026 to €91.2 billion in 2027 (French government). That forecast rests on the government's own assumptions. This week's auction did not cause it.

Buyers of the new bonds are the clear winners: they collect the higher return for years, provided France keeps paying. The bill lands on the budget. Prime Minister Sébastien Lecornu aims to cut the deficit, the yearly gap between spending and revenue, from 5.4% of GDP to 5.0% in 2027, while debt still rises to about 121.7% (budget dossier).

Public workers and most pensioners would carry part of that effort through pay and pension freezes, alongside new taxes (Reuters). France's independent fiscal watchdog called the government's growth forecast of about 1.0% optimistic and described the deficit target as a minimum (Le Monde). A bigger deficit means more bonds to sell at the new price.

France has no trouble finding lenders. If yields stay near this week's level, every refinancing will lock in a higher rate for years, and the interest bill will climb with each bond that matures. How far it climbs depends on where rates sit when that €197.4 billion comes due. Lecornu's government, and the divided parliament that must pass its budget, will then have to choose how to pay for it: deeper freezes, more taxes, or more borrowing at the higher price.