For years, Russia’s central financial institution has skillfully shielded the nation’s economic system when disaster has loomed, drastically elevating rates of interest, limiting cash actions or taking on ailing banks. The swift, sharp strikes conveyed a transparent message that, regardless of more and more bitter financial conflicts with the West, financial stability could be maintained at any price.

On Tuesday, the financial institution’s long-serving and broadly revered chief, Elvira Nabiullina, moved assertively once more, asserting the third-largest rate of interest improve in a decade to shore up the nationwide foreign money, the ruble, and dent rising inflation. But, this time, her aggressive strikes had little speedy impact on the markets.

The central financial institution’s actions underlined the perilous second going through Russian financial officers as they attempt to comprise the seismic forces unleashed by President Vladimir V. Putin’s invasion of Ukraine. The warfare has left policymakers with a seemingly unattainable set of duties: sustaining financial stability whereas financing the warfare machine and dealing with Western sanctions; taming inflation with out pitching the economic system into recession.

The financial institution raised the benchmark rate of interest by 3.5 proportion factors to 12 p.c. Excessive rates of interest elevate the price of borrowing, inhibiting spending. That, in flip, slows financial development and might curb inflation. However political issues can push in the other way, for low rates of interest that stimulate spending and maintain the economic system transferring.

The ruble recovered modestly after the announcement; after falling to 100 to the greenback on Monday, it reached 97 on Tuesday.

Businesspeople criticized the rising price of borrowing, and economists stated the elements weakening the ruble had been so highly effective that the rate of interest improve would fail to attain Ms. Nabiullina’s targets. Her political detractors, in the meantime, have stepped up their assaults, accusing the central financial institution chief this week of both going too far or not far sufficient to defend the Russian foreign money.

“So long as the federal government’s precedence stays spending on the warfare effort, it’s going to be very troublesome for the central financial institution to forestall the economic system from overheating,” stated Liam Peach, a senior rising markets economist at Capital Economics in London. He added that altering rates of interest wouldn’t have the specified results until the federal government reduce spending, which it’s unlikely to do earlier than subsequent yr’s scheduled presidential election.

Financial officers around the globe, together with these in the US, are pressured to make trade-offs between conflicting priorities, and they’re more and more subjected to political pressures.

However the balancing act for Ms. Nabiullina and different Russian financial leaders is made particularly laborious by Mr. Putin’s dedication to wage the biggest land warfare in Europe since World Battle II whereas preserving the facade of a nation at peace. Regardless of hundreds of Russian deaths, a authorities that refuses to name the battle a warfare has labored laborious to permit most residents to hold on with their lives as typical and to forestall any public questioning of the rationale for warfare.

The warfare prompted waves of Western sanctions and an exodus of capital and employees — each international and Russian.

Days after the invasion in February 2022, the central financial institution raised rates of interest by greater than 10 proportion factors and quickly restricted foreign money buying and selling, drastic strikes aimed toward shielding the economic system from the preliminary shock. The insurance policies broadly labored, stopping the Russian economic system from collapsing. After an preliminary plunge, the ruble stabilized.

But, because the invasion descended right into a warfare of attrition, the central financial institution started to steadily reduce charges once more, mirroring the Kremlin’s want to keep up in style help for the warfare. Public spending boomed, permitting factories to boost wages and rent extra employees to fulfill army orders, and the federal government gave Russians entry to low-cost mortgages and different subsidies.

Within the first 5 months of this yr, the federal government spent 50 p.c extra, in rubles, than in the identical interval in 2021, at the same time as state revenues fell sharply due to oil sanctions.

That spending binge put extra money in strange Russians’ pockets, at the same time as home manufacturing was unable to fulfill the brand new demand for items and providers. That provides as much as inflation, which rose to a mean of seven.6 p.c per yr up to now three months, when adjusted for seasonal discrepancies, in response to the central financial institution, considerably above its 4 p.c annual goal.

Inflation and the weakening ruble additionally ate up one another. Unable to fulfill their wants regionally, corporations and people have turned to imports, usually paying larger costs to bypass sanctions. That has boosted demand for international foreign money and weakened the ruble, which raises the price of imports nonetheless larger.

Ordinarily, a weak foreign money boosts exports, making a rustic’s merchandise cheaper overseas, however sanctions have sharply restricted Russian producers’ capability to promote to international markets.

Whereas Russia’s inflation stays beneath what the US and far of Europe have skilled as just lately as early this yr, the speedy tempo of value will increase created a notion that the central financial institution was dropping management at a dangerous time for the economic system.

Russia’s foreign money can also be pressured by the continued capital flight. Dealing with an unsure future, many Russians have moved their financial savings overseas because the outbreak of the warfare, transferring greater than a billion {dollars}’ price in three days of nationwide upheaval in late June, in response to the central financial institution, when Wagner mercenaries mutinied towards the army.

The ruble has been on a protracted, regular slide since early January, when it traded briefly at fewer than 70 to the greenback. On Monday, when it crossed the symbolically threshold of 100 to a greenback, a number of Russian politicians blamed Ms. Nabiullina for the decline.

The Kremlin’s chief financial adviser stated the foreign money was dropping its worth as a result of the central financial institution was offering excessively low-cost credit score, with out mentioning the federal government’s personal function in stoking a wartime credit score growth. A “sturdy ruble is within the curiosity of the Russian economic system,” the adviser, Maksim Oreshkin, wrote in a column printed by the state-run TASS information company.

A number of Russian lawmakers referred to as on Ms. Nabiullina to publicly clarify the explanations for the ruble’s decline. “The alternate price has a major affect on the social rights of our residents,” one nationalist lawmaker, Andrei Klishas, wrote on the Telegram messaging app on Monday.

The central financial institution reacted on Monday with a brief assertion that it was calling a unprecedented assembly the subsequent day, after which sharply raised charges on Tuesday.

Some Russian economists criticized Ms. Nabiullina for a heavy-handed response to an issue she was unable to unravel.

“We’re dissatisfied that the press assertion didn’t clarify the need of holding the extraordinary assembly,” economists at Russia’s largest personal lender, Alfa Financial institution, wrote in a observe to purchasers on Tuesday. This “reduces the predictability of the central financial institution’s actions,” they added.

Economists say they consider that Ms. Nabiullina nonetheless has technical instruments to have an effect on the course of the Russian economic system. Final week, for instance, the central financial institution halted its typical buy of Chinese language yuan for its reserves so as to shore up the ruble.

The central financial institution can go additional, promoting off extra of its international foreign money holdings, limiting motion of cash overseas and forcing exporters to transform their worldwide foreign money earnings into rubles, Mikhail Vasiliev, an analyst with the Moscow-based lender Sovkombank, instructed native information media on Monday.

However the warfare seems to have dented Ms. Nabiullina’s primary weapon, setting the price of borrowing, underlining the waning energy of Mr. Putin’s financial officers to defend the economic system from his actions.

Oleg Matsnev and Alina Lobzina contributed reporting.