EU diplomats will weigh sweeping Russian sanctions on Thursday that include a proposal to ban all Europeans from purchasing any new debt or stock issued by Russia’s largest banks, according to a proposal seen by the Financial Times.

The sanctions measure, contained in a 10-page options memo prepared by the European Commission and distributed to national capitals, also proposes barring the Russian banks from listing new issues on European exchanges, preventing them from using London or other EU stock markets to raise funds from non-Europeans.

The proposal would not initially include a similar prohibition for Russian sovereign bond auctions out of fear the Kremlin could retaliate by ordering an end to Russian purchases of EU government debt, the document states.