By Alexander Kolyandr 

MOSCOW--The Russian ruble strengthened and stock market rose on Tuesday as a new wave of Western sanctions appeared to be softer than expected.

The U.S. and Europe imposed sanctions on a slate of new Russian government officials and business entities in an effort to pressure President Vladimir Putin and his Ukrainian allies to cease military activity in eastern Ukraine.

However, despite widely circulated rumors that a number of leading Russian publicly traded companies--including banks and energy firms--may be on the list, only privately owned companies connected with people already sanctioned appeared on the list.

"In anticipation of new sanctions, markets were indubitably prepared for a number of grim scenarios. The publication of the latest list thus was taken with a considerable degree of relief," Russia's largest lender Sberbank said.

Sobinbank, one of the sanctioned banks, said in a statement to clients that the move would not impede its operations any further, as it has been under de facto sanctions for a month after its owner, Rossija Bank, was targeted in March.

International payment systems Visa Inc. and MasterCard Inc. in March stopped servicing Bank Rossiya and three banks connected with it--Sobinbank, InvestCapitalBank and SMP Bank. The payment systems resumed services to two of the banks briefly, but stopped again after they were sanctioned on April 28.

SMP Bank, controlled by the already sanctioned brothers Arkady Rotenberg and Boris Rotenberg, informed customers about the sanctions on its website, and asked them to use their cards only to withdraw cash and not to wire any foreign currency. The bank also stopped taking deposits in foreign currency, but promised to service all of its obligations in rubles.

IvestCapitalBank also asked clients not to use cards other than for withdrawing cash, but promised to continue services as usual.

Russian State Technology Corporation Rostec, whose Chief Executive Sergey Chemezov was sanctioned Tuesday, said "restrictions introduced will not prevent him from performing his duties nor will they affect the operations of the companies in which" he is a board member.

The U.S. put a number of non-public companies controlled by Gennady Timchenko, sanctioned in March, on the new list , but left natural gas company Novatek, in which he owns just below 25%, untouched. Shares in Novatek gained 1.2%, outperforming both the wider market and the peers.

Construction firm Mostotrest, in which Arkady Rotenberg controls just above 25%, was also not sanctioned, and its shares were up almost 1% in the first half of the day, but then lost some of its gains.

The market itself was up Tuesday, with Micex trading up almost 0.9% during the day. The ruble strengthened 0.7% against the dollar, while Russia's 30-years sovereign bonds rose 1 percentage point.

But Russia doesn't appear to take the sanctions lightly. Deputy Foreign Minister Sergei Ryabkov said Tuesday "the seriousness of the sanctions is obvious to us, particularly in the high-tech sector, the U.S. import that can be used in defense, and in space industry".

Write to Alexander Kolyandr at Alexander.Kolyandr@wsj.com

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