Goldman Sachs is seeking to create its own cryptocurrency for post-trade settlement, according to a recently released patent filing.

The cryptocurrency, called SETLcoin, would be the architecture behind a new securities settlement system for the banking giant that would reduce delays in the transfer of assets; the time between when the transaction is initiated and finalized can take days.

SETLcoin guarantees instant execution and settlement, according to the filing, submitted October 2014.

"As implemented by the described technology, a trader no longer trades securities by meeting at an exchange with an indication of cash for security and then settles the transaction… meanwhile bearing all of the associated credit risk in the interim," it says.

Goldman isn't the first to patent its own cryptocurrency. Citi and Bank of New York Mellon have also created them, CitiCoin and BK Coins respectively, for internal testing of blockchain technology.

Banks have become increasingly interested in blockchain technology this year. Goldman Sachs was one of the inaugural members of the R3CEV consortium, which now has 30 members and is expected to announce more soon. That firm is developing a similar distributed ledger-based settlement platform with which its members can experiment.