Goldman Sachs has been awarded a patent for its proposed "SETLcoin" cryptocurrency settlement system. The concept envisions a system for settling securities trades using a built-in cryptocurrency.
[A] SETLcoin wallet can house a single security or multiple denominations of the same security (e.g., 1 IBM-S SETLcoin valued at 100 IBM shares). SETLcoin wallets may also house multiple securities (e.g., 1 IBM-S SETLcoin and 2 GOOG-S SETLcoins). For example, a single IBM-S SETLcoin may be exchangeable for one or more "GOOG" SETLcoins (i.e., Google shares), for 13,000 USD SETLcoins, 100 litecoins, and/or for 5 bitcoins."
http://www.coindesk.com/goldman-sachs-granted-setlcoin-cryptocurrency-patent/