Jan 21 (Reuters) - F/m Investments said on Wednesday that the asset manager has filed with a regulator for approval to record ​ownership of tokenized shares in its U.S. Treasury 3-month bill (TBIL) ETF ‌on a permissioned blockchain. The filing with the U.S. Securities and Exchange Commission comes amid growing ‌efforts by asset managers and exchanges to bring tokenization into traditional markets, even as U.S. regulators assess how blockchain-based settlement and record-keeping can operate under long-stan ...