Morgan Stanley is seeking regulatory approval to launch exchange-traded funds tied to the price of cryptocurrency tokens, ​according to filings with the U.S. Securities and Exchange Commission ‌on Tuesday, the first such move by a big U.S. bank. Regulatory clarity under U.S. President Donald Trump has encouraged mainstream finance companies ⁠to embrace digital assets, which ‌were once considered merely speculative instruments. In December, the Office of the Comptroller of the Currency also allowed banks ‍to act as intermediaries on crypto transactions, narrowing the gap between the traditional sector and digital assets.