A recent EU decision to use funds from so-called "windfall profits" generated by frozen assets could potentially provide billions of dollars annually to help Ukraine resist the Russian invasion, Neiman said.
The U.S. and its G7 partners are discussing how to deliver an even larger amount of funds to Ukraine right now, he said.
"One possibility may be to lend a significant amount up front to help Ukraine over the short run and link repayment of that loan to the stream of future windfall profits," Neiman said.
Doing so would provide an immediate fiscal boost to Ukraine and signal to Russian dictator Vladimir Putin that he "cannot simply outlast Ukraine and its partners," he said.
The U.S. has been pushing the United Kingdom, Canada, France, Germany, Italy, and Japan to embrace a loan backed by the income from the frozen assets that could provide Kyiv with as much as $50 billion in near-term funding, Reuters said.
The loan has emerged as the top option given that G7 countries remain at odds over seizing the assets outright.
Confiscation of Russian assets
The USA and EU are jointly considering legal authority to direct $300 billion in Russian assets to Ukraine's reconstruction and other needs, U.S. State Secretary Antony Blinken said.
The U.S. Senate Foreign Relations Committee approved a bill to confiscate Russian assets and transfer them to Ukraine to rebuild its infrastructure on Jan. 24.
Outlines of decisions necessary to transfer frozen Russian assets to Ukraine are already being prepared, Ukrainian President Volodymyr Zelenskyy said.
Bill No. 8038 on the transfer of frozen Russian assets to Ukraine received the required number of votes to be passed by the U.S. House of Representatives on April 20.
Ukraine may receive almost $8 billion as part of this procedure.
EU ambassadors reached a preliminary agreement on May 8 to direct revenue generated by frozen Russian assets toward supporting Ukraine.
The U.S. intends to use seized Russian assets to finance the reconstruction of Ukraine, Blinken confirmed on May 14, during a visit to Kyiv.
The first payment of surplus profits from the use of frozen Russian assets in the EU will be in July 2024, the European Commission announced on May 21.