The RMBS is backed by prime owner-occupier mortgages originated by Accord Mortgages, an intermediary-only lending subsidiary of the Yorkshire.
Yorkshire has sold £400m of the class A notes to investors and will retain £350m.
The move follows RMBS launches by lenders including Skipton Building Society and Santander in recent months.
Chris Parrish, group treasurer at the Yorkshire, says the society originally planned to enter the securitisation market in 2007 but the credit crunch put its plans on hold.
He says: “We decided now was the right time for the launch because the market is beginning to recover and we wanted to develop our ability to access a variety of funding sources.
“The bonds were very well received by investors and were two times over-subscribed. The securitisation market is clearly smaller than it was pre-credit crunch, but it is now much more sustainable.”