Russia's 10-year government bonds became more expensive to borrow against on July 6, 2026. The cost rose to 16.71%, up slightly from the day before, according to Trading Economics. This happened the same day a Ukrainian drone struck the Omsk refinery, Russia's biggest, in what Reuters called one of the deepest strikes yet into Russian territory—nearly 2,700 km inside Russia.

To understand what this means: when investors lend money to a government or company, they expect to be paid back with interest. That interest rate is called a yield. When a borrower becomes riskier, investors demand a higher interest rate as payment for the extra danger. Think of it like lending money to a friend: if your friend's job becomes shaky, you'd ask for a higher interest rate before you lend again. That's what happened to Russia's bonds.

Russia's 10-year bonds now yield far more than they did earlier in the year. Back then, the rate was 13.274%. That means the rate has jumped by roughly 3.4 percentage points in just a few months—a big shift that signals investors now see Russia as riskier.

Multiple refineries hit in weeks

The Omsk strike is not an isolated incident. On June 16, 2026, a drone hit the Moscow oil refinery, Reuters reported. Two days later, on June 18, the same facility was struck again. The Guardian called it Ukraine's biggest air raid on Moscow since the war started. By late June, Reuters reported that this refinery might not restart until the end of the year—meaning it could be shut down for six months or longer.

On June 27–28, another strike hit the Krasnodar refinery, Reuters reported. Within three weeks, three of Russia's largest refineries had been damaged.

Why this matters for bond prices

When refineries shut down, they stop producing fuel. Russia sells refined oil products around the world and taxes the companies that make them. When refineries are offline, those sales and tax revenues drop. Government bonds become riskier when investors worry a country won't have enough money to pay its debts. So when Russia loses refinery income, bond investors get nervous—and they demand higher interest rates as protection against that risk.

No one has published a number yet for how much money Russia will lose from these strikes. But the timing is hard to miss: on the day of the Omsk strike, bond yields jumped. This came after weeks of damage to other major refineries. It suggests investors are watching these attacks closely and repricing what they think Russian bonds are worth.

There's a question the bond market will answer in the coming weeks: if Russia gets these refineries back online quickly, will yields fall back down? Or will investors stay cautious about future attacks? Right now, we don't know.