For all the sci-fi promises about blockchain transforming finance, the reality will be more mundane as thousands of ordinary instruments quietly move to digital ledgers. On Wednesday, it was money market funds.

Goldman Sachs and BNY have joined hands to launch digital tokens that mirror shares of money market funds, deepening Wall Street's push to bring blockchain technology into traditional finance. Investors can now buy and sell money market fund shares on BNY's LiquidityDirect platform,

The Bank of New York Mellon (NYSE:BK), also known as BNY, is teaming up with Goldman Sachs Group (NYSE:GS) to use blockchain technology developed by Goldman to keep a record of customers' ownership of certain money market funds ("MMF"),